platform/kernel/linux-starfive.git
6 years agobcache: Populate writeback_rate_minimum attribute
Ben Peddell [Mon, 8 Oct 2018 12:41:13 +0000 (20:41 +0800)]
bcache: Populate writeback_rate_minimum attribute

Forgot to include the maintainers with my first email.

Somewhere between Michael Lyle's original
"bcache: PI controller for writeback rate V2" patch dated 07 Sep 2017
and 1d316e6 bcache: implement PI controller for writeback rate,
the mapping of the writeback_rate_minimum attribute was dropped.

Re-add the missing sysfs writeback_rate_minimum attribute mapping to
"allow the user to specify a minimum rate at which dirty blocks are
retired."

Fixes: 1d316e6 ("bcache: implement PI controller for writeback rate")
Signed-off-by: Ben Peddell <klightspeed@killerwolves.net>
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agobcache: correct dirty data statistics
Tang Junhui [Mon, 8 Oct 2018 12:41:12 +0000 (20:41 +0800)]
bcache: correct dirty data statistics

When bcache device is clean, dirty keys may still exist after
journal replay, so we need to count these dirty keys even
device in clean status, otherwise after writeback, the amount
of dirty data would be incorrect.

Signed-off-by: Tang Junhui <tang.junhui.linux@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agobcache: fix typo in code comments of closure_return_with_destructor()
Coly Li [Mon, 8 Oct 2018 12:41:11 +0000 (20:41 +0800)]
bcache: fix typo in code comments of closure_return_with_destructor()

The code comments of closure_return_with_destructor() in closure.h makrs
function name as closure_return(). This patch fixes this type with the
correct name - closure_return_with_destructor.

Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agobcache: fix ioctl in flash device
Tang Junhui [Mon, 8 Oct 2018 12:41:10 +0000 (20:41 +0800)]
bcache: fix ioctl in flash device

When doing ioctl in flash device, it will call ioctl_dev() in super.c,
then we should not to get cached device since flash only device has
no backend device. This patch just move the jugement dc->io_disable
to cached_dev_ioctl() to make ioctl in flash device correctly.

Fixes: 0f0709e6bfc3c ("bcache: stop bcache device when backing device is offline")
Signed-off-by: Tang Junhui <tang.junhui.linux@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agobcache: use REQ_PRIO to indicate bio for metadata
Coly Li [Mon, 8 Oct 2018 12:41:09 +0000 (20:41 +0800)]
bcache: use REQ_PRIO to indicate bio for metadata

In cached_dev_cache_miss() and check_should_bypass(), REQ_META is used
to check whether a bio is for metadata request. REQ_META is used for
blktrace, the correct REQ_ flag should be REQ_PRIO. This flag means the
bio should be prior to other bio, and frequently be used to indicate
metadata io in file system code.

This patch replaces REQ_META with correct flag REQ_PRIO.

CC Adam Manzanares because he explains to me what REQ_PRIO is for.

Signed-off-by: Coly Li <colyli@suse.de>
Cc: Adam Manzanares <adam.manzanares@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agobcache: trace missed reading by cache_missed
Tang Junhui [Mon, 8 Oct 2018 12:41:08 +0000 (20:41 +0800)]
bcache: trace missed reading by cache_missed

Missed reading IOs are identified by s->cache_missed, not the
s->cache_miss, so in trace_bcache_read() using trace_bcache_read
to identify whether the IO is missed or not.

Signed-off-by: Tang Junhui <tang.junhui.linux@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agobcache: account size of buckets used in uuid write to ca->meta_sectors_written
Shenghui Wang [Mon, 8 Oct 2018 12:41:07 +0000 (20:41 +0800)]
bcache: account size of buckets used in uuid write to ca->meta_sectors_written

UUIDs are considered as metadata. __uuid_write should add the number
of buckets (in sectors) written to disk to ca->meta_sectors_written.
Currently only 1 bucket is used in uuid write.

Steps to test:
1) create a fresh backing device and a fresh cache device separately.
   The backing device didn't attach to any cache set.
2) cd /sys/block/<cache device>/bcache
   cat metadata_written      // record the output value
   cat bucket_size
3) attach the backing device to cache set
4) cat metadata_written
   The output value is almost the same as the value in step 2
   before the change.
   After the change, the value is bigger about 1 bucket size.

Signed-off-by: Shenghui Wang <shhuiw@foxmail.com>
Reviewed-by: Tang Junhui <tang.junhui.linux@gmail.com>
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoblk-mq-debugfs: Also show requests that have not yet been started
Bart Van Assche [Thu, 4 Oct 2018 17:35:24 +0000 (10:35 -0700)]
blk-mq-debugfs: Also show requests that have not yet been started

When debugging e.g. the SCSI timeout handler it is important that
requests that have not yet been started or that already have
completed are also reported through debugfs.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoMerge branch 'nvme-4.20' of git://git.infradead.org/nvme into for-4.20/block
Jens Axboe [Fri, 5 Oct 2018 14:15:12 +0000 (08:15 -0600)]
Merge branch 'nvme-4.20' of git://git.infradead.org/nvme into for-4.20/block

Pull NVMe updates from Christoph:

"A relatively boring merge window:

 - better AEN tracing (Chaitanya)
 - NUMA aware PCIe multipathing (me)
 - RDMA workqueue fixes (Sagi)
 - better bio usage in the target (Sagi)
 - FC rework for target removal (James)
 - better multipath handling of ->queue_rq failures (James)
 - various cleanups (Milan)"

* 'nvme-4.20' of git://git.infradead.org/nvme:
  nvmet-rdma: use a private workqueue for delete
  nvme: take node locality into account when selecting a path
  nvmet: don't split large I/Os unconditionally
  nvme: call nvme_complete_rq when nvmf_check_ready fails for mpath I/O
  nvme-core: add async event trace helper
  nvme_fc: add 'nvme_discovery' sysfs attribute to fc transport device
  nvmet_fc: support target port removal with nvmet layer
  nvme-fc: fix for a minor typos
  nvmet: remove redundant module prefix
  nvme: fix typo in nvme_identify_ns_descs

6 years agonvmet-rdma: use a private workqueue for delete
Sagi Grimberg [Thu, 27 Sep 2018 18:00:31 +0000 (11:00 -0700)]
nvmet-rdma: use a private workqueue for delete

Queue deletion is done asynchronous when the last reference on the queue
is dropped.  Thus, in order to make sure we don't over allocate under a
connect/disconnect storm, we let queue deletion complete before making
forward progress.

However, given that we flush the system_wq from rdma_cm context which
runs from a workqueue context, we can have a circular locking complaint
[1]. Fix that by using a private workqueue for queue deletion.

[1]:
======================================================
WARNING: possible circular locking dependency detected
4.19.0-rc4-dbg+ #3 Not tainted
------------------------------------------------------
kworker/5:0/39 is trying to acquire lock:
00000000a10b6db9 (&id_priv->handler_mutex){+.+.}, at: rdma_destroy_id+0x6f/0x440 [rdma_cm]

but task is already holding lock:
00000000331b4e2c ((work_completion)(&queue->release_work)){+.+.}, at: process_one_work+0x3ed/0xa20

which lock already depends on the new lock.

the existing dependency chain (in reverse order) is:

-> #3 ((work_completion)(&queue->release_work)){+.+.}:
       process_one_work+0x474/0xa20
       worker_thread+0x63/0x5a0
       kthread+0x1cf/0x1f0
       ret_from_fork+0x24/0x30

-> #2 ((wq_completion)"events"){+.+.}:
       flush_workqueue+0xf3/0x970
       nvmet_rdma_cm_handler+0x133d/0x1734 [nvmet_rdma]
       cma_ib_req_handler+0x72f/0xf90 [rdma_cm]
       cm_process_work+0x2e/0x110 [ib_cm]
       cm_req_handler+0x135b/0x1c30 [ib_cm]
       cm_work_handler+0x2b7/0x38cd [ib_cm]
       process_one_work+0x4ae/0xa20
nvmet_rdma:nvmet_rdma_cm_handler: nvmet_rdma: disconnected (10): status 0 id 0000000040357082
       worker_thread+0x63/0x5a0
       kthread+0x1cf/0x1f0
       ret_from_fork+0x24/0x30
nvme nvme0: Reconnecting in 10 seconds...

-> #1 (&id_priv->handler_mutex/1){+.+.}:
       __mutex_lock+0xfe/0xbe0
       mutex_lock_nested+0x1b/0x20
       cma_ib_req_handler+0x6aa/0xf90 [rdma_cm]
       cm_process_work+0x2e/0x110 [ib_cm]
       cm_req_handler+0x135b/0x1c30 [ib_cm]
       cm_work_handler+0x2b7/0x38cd [ib_cm]
       process_one_work+0x4ae/0xa20
       worker_thread+0x63/0x5a0
       kthread+0x1cf/0x1f0
       ret_from_fork+0x24/0x30

-> #0 (&id_priv->handler_mutex){+.+.}:
       lock_acquire+0xc5/0x200
       __mutex_lock+0xfe/0xbe0
       mutex_lock_nested+0x1b/0x20
       rdma_destroy_id+0x6f/0x440 [rdma_cm]
       nvmet_rdma_release_queue_work+0x8e/0x1b0 [nvmet_rdma]
       process_one_work+0x4ae/0xa20
       worker_thread+0x63/0x5a0
       kthread+0x1cf/0x1f0
       ret_from_fork+0x24/0x30

Fixes: 777dc82395de ("nvmet-rdma: occasionally flush ongoing controller teardown")
Reported-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Tested-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
6 years agoblock: Finish renaming REQ_DISCARD into REQ_OP_DISCARD
Bart Van Assche [Wed, 3 Oct 2018 20:56:25 +0000 (13:56 -0700)]
block: Finish renaming REQ_DISCARD into REQ_OP_DISCARD

Some time ago REQ_DISCARD was renamed into REQ_OP_DISCARD. Some comments
and documentation files were not updated however. Update these comments
and documentation files. See also commit 4e1b2d52a80d ("block, fs,
drivers: remove REQ_OP compat defs and related code").

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Philipp Reisner <philipp.reisner@linbit.com>
Cc: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agocdrom: fix improper type cast, which can leat to information leak.
Young_X [Wed, 3 Oct 2018 12:54:29 +0000 (12:54 +0000)]
cdrom: fix improper type cast, which can leat to information leak.

There is another cast from unsigned long to int which causes
a bounds check to fail with specially crafted input. The value is
then used as an index in the slot array in cdrom_slot_status().

This issue is similar to CVE-2018-16658 and CVE-2018-10940.

Signed-off-by: Young_X <YangX92@hotmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agopktcdvd: fix fall-through annotation
Gustavo A. R. Silva [Tue, 2 Oct 2018 10:24:40 +0000 (12:24 +0200)]
pktcdvd: fix fall-through annotation

Replace "fallthru" with a proper "fall through" annotation.

This fix is part of the ongoing efforts to enabling
-Wimplicit-fallthrough

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agonvme: take node locality into account when selecting a path
Christoph Hellwig [Tue, 11 Sep 2018 07:51:29 +0000 (09:51 +0200)]
nvme: take node locality into account when selecting a path

Make current_path an array with an entry for every possible node, and
cache the best path on a per-node basis.  Take the node distance into
account when selecting it.  This is primarily useful for dual-ported PCIe
devices which are connected to PCIe root ports on different sockets.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
6 years agonvmet: don't split large I/Os unconditionally
Sagi Grimberg [Fri, 28 Sep 2018 22:40:43 +0000 (15:40 -0700)]
nvmet: don't split large I/Os unconditionally

If we know that the I/O size exceeds our inline bio vec, no
point using it and split the rest to begin with. We could
in theory reuse the inline bio and only allocate the bio_vec,
but its really not worth optimizing for.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
6 years agonvme: call nvme_complete_rq when nvmf_check_ready fails for mpath I/O
James Smart [Thu, 27 Sep 2018 23:58:54 +0000 (16:58 -0700)]
nvme: call nvme_complete_rq when nvmf_check_ready fails for mpath I/O

When an io is rejected by nvmf_check_ready() due to validation of the
controller state, the nvmf_fail_nonready_command() will normally return
BLK_STS_RESOURCE to requeue and retry.  However, if the controller is
dying or the I/O is marked for NVMe multipath, the I/O is failed so that
the controller can terminate or so that the io can be issued on a
different path.  Unfortunately, as this reject point is before the
transport has accepted the command, blk-mq ends up completing the I/O
and never calls nvme_complete_rq(), which is where multipath may preserve
or re-route the I/O. The end result is, the device user ends up seeing an
EIO error.

Example: single path connectivity, controller is under load, and a reset
is induced.  An I/O is received:

  a) while the reset state has been set but the queues have yet to be
     stopped; or
  b) after queues are started (at end of reset) but before the reconnect
     has completed.

The I/O finishes with an EIO status.

This patch makes the following changes:

  - Adds the HOST_PATH_ERROR pathing status from TP4028
  - Modifies the reject point such that it appears to queue successfully,
    but actually completes the io with the new pathing status and calls
    nvme_complete_rq().
  - nvme_complete_rq() recognizes the new status, avoids resetting the
    controller (likely was already done in order to get this new status),
    and calls the multipather to clear the current path that errored.
    This allows the next command (retry or new command) to select a new
    path if there is one.

Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
6 years agonvme-core: add async event trace helper
Chaitanya Kulkarni [Mon, 17 Sep 2018 17:47:06 +0000 (10:47 -0700)]
nvme-core: add async event trace helper

This patch adds a new event for nvme async event notification.
We print the async event in the decoded format when we recognize
the event otherwise we just dump the result.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
6 years agonvme_fc: add 'nvme_discovery' sysfs attribute to fc transport device
James Smart [Thu, 13 Sep 2018 23:17:38 +0000 (16:17 -0700)]
nvme_fc: add 'nvme_discovery' sysfs attribute to fc transport device

The fc transport device should allow for a rediscovery, as userspace
might have lost the events. Example is udev events not handled during
system startup.

This patch add a sysfs entry 'nvme_discovery' on the fc class to
have it replay all udev discovery events for all local port/remote
port address pairs.

Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
6 years agonvmet_fc: support target port removal with nvmet layer
James Smart [Thu, 9 Aug 2018 23:48:14 +0000 (16:48 -0700)]
nvmet_fc: support target port removal with nvmet layer

Currently, if a targetport has been connected to via the nvmet config
(in other words, the add_port() transport routine called, and the nvmet
port pointer stored for using in upcalls on new io), and if the
targetport is then removed (say the lldd driver decides to unload or
fully reset its hardware) and then re-added (the lldd driver reloads or
reinits its hardware), the port pointer has been lost so there's no way
to continue to post commands up to nvmet via the transport port.

Correct by allocating a small "port context" structure that will be
linked to by the targetport. The context will save the targetport WWN's
and the nvmet port pointer to use for it.  Initial allocation will occur
when the targetport is bound to via add_port.  The context will be
deallocated when remove_port() is called.  If a targetport is removed
while nvmet has the active port context, the targetport will be unlinked
from the port context before removal.  If a new targetport is registered,
the port contexts without a binding are looked through and if the WWN's
match (so it's the same as nvmet's port context) the port context is
linked to the new target port.  Thus new io can be received on the new
targetport and operation resumes with nvmet.

Additionally, this also resolves nvmet configuration changing out from
underneath of the nvme-fc target port (for example: a nvmetcli clear).

Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
6 years agonvme-fc: fix for a minor typos
Milan P. Gandhi [Fri, 10 Aug 2018 09:24:02 +0000 (14:54 +0530)]
nvme-fc: fix for a minor typos

Signed-off-by: Milan P. Gandhi <mgandhi@redhat.com>
Reviewed-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
6 years agonvmet: remove redundant module prefix
Chaitanya Kulkarni [Tue, 11 Sep 2018 00:39:33 +0000 (17:39 -0700)]
nvmet: remove redundant module prefix

This patch removes the redundant module prefix used in the pr_err() when
nvmet_get_smart_log_nsid() failed to find the namespace provided as a part
of smart-log command.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
6 years agonvme: fix typo in nvme_identify_ns_descs
Milan P. Gandhi [Thu, 9 Aug 2018 16:19:24 +0000 (21:49 +0530)]
nvme: fix typo in nvme_identify_ns_descs

Signed-off-by: Milan P. Gandhi <mgandhi@redhat.com>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
6 years agoMerge tag 'v4.19-rc6' into for-4.20/block
Jens Axboe [Mon, 1 Oct 2018 14:58:57 +0000 (08:58 -0600)]
Merge tag 'v4.19-rc6' into for-4.20/block

Merge -rc6 in, for two reasons:

1) Resolve a trivial conflict in the blk-mq-tag.c documentation
2) A few important regression fixes went into upstream directly, so
   they aren't in the 4.20 branch.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
* tag 'v4.19-rc6': (780 commits)
  Linux 4.19-rc6
  MAINTAINERS: fix reference to moved drivers/{misc => auxdisplay}/panel.c
  cpufreq: qcom-kryo: Fix section annotations
  perf/core: Add sanity check to deal with pinned event failure
  xen/blkfront: correct purging of persistent grants
  Revert "xen/blkfront: When purging persistent grants, keep them in the buffer"
  selftests/powerpc: Fix Makefiles for headers_install change
  blk-mq: I/O and timer unplugs are inverted in blktrace
  dax: Fix deadlock in dax_lock_mapping_entry()
  x86/boot: Fix kexec booting failure in the SEV bit detection code
  bcache: add separate workqueue for journal_write to avoid deadlock
  drm/amd/display: Fix Edid emulation for linux
  drm/amd/display: Fix Vega10 lightup on S3 resume
  drm/amdgpu: Fix vce work queue was not cancelled when suspend
  Revert "drm/panel: Add device_link from panel device to DRM device"
  xen/blkfront: When purging persistent grants, keep them in the buffer
  clocksource/drivers/timer-atmel-pit: Properly handle error cases
  block: fix deadline elevator drain for zoned block devices
  ACPI / hotplug / PCI: Don't scan for non-hotplug bridges if slot is not bridge
  drm/syncobj: Don't leak fences when WAIT_FOR_SUBMIT is set
  ...

Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoLinux 4.19-rc6
Greg Kroah-Hartman [Sun, 30 Sep 2018 14:15:35 +0000 (07:15 -0700)]
Linux 4.19-rc6

6 years agoMerge tag 'auxdisplay-for-greg-v4.19-rc6' of https://github.com/ojeda/linux
Greg Kroah-Hartman [Sun, 30 Sep 2018 13:20:33 +0000 (06:20 -0700)]
Merge tag 'auxdisplay-for-greg-v4.19-rc6' of https://github.com/ojeda/linux

Miguel writes:
  "A trivial fix for auxdisplay

    - MAINTAINERS reference fix for moved file
      Reported by Joe Perches"

* tag 'auxdisplay-for-greg-v4.19-rc6' of https://github.com/ojeda/linux:
  MAINTAINERS: fix reference to moved drivers/{misc => auxdisplay}/panel.c

6 years agoMerge tag 'libnvdimm-fixes2-4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel...
Greg Kroah-Hartman [Sun, 30 Sep 2018 13:19:38 +0000 (06:19 -0700)]
Merge tag 'libnvdimm-fixes2-4.19-rc6' of git://git./linux/kernel/git/nvdimm/nvdimm

Dan writes:
  "filesystem-dax for 4.19-rc6

   Fix a deadlock in the new for 4.19 dax_lock_mapping_entry() routine."

* tag 'libnvdimm-fixes2-4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  dax: Fix deadlock in dax_lock_mapping_entry()

6 years agoMAINTAINERS: fix reference to moved drivers/{misc => auxdisplay}/panel.c
Miguel Ojeda [Sun, 30 Sep 2018 11:50:05 +0000 (13:50 +0200)]
MAINTAINERS: fix reference to moved drivers/{misc => auxdisplay}/panel.c

Commit 51c1e9b554c9 ("auxdisplay: Move panel.c to drivers/auxdisplay folder")
moved the file, but the MAINTAINERS reference was not updated.

Link: https://lore.kernel.org/lkml/20180928220131.31075-1-joe@perches.com/
Reported-by: Joe Perches <joe@perches.com>
Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
6 years agoMerge tag 'for-linus-20180929' of git://git.kernel.dk/linux-block
Greg Kroah-Hartman [Sat, 29 Sep 2018 21:52:14 +0000 (14:52 -0700)]
Merge tag 'for-linus-20180929' of git://git.kernel.dk/linux-block

Jens writes:
  "Block fixes for 4.19-rc6

   A set of fixes that should go into this release. This pull request
   contains:

   - A fix (hopefully) for the persistent grants for xen-blkfront. A
     previous fix from this series wasn't complete, hence reverted, and
     this one should hopefully be it. (Boris Ostrovsky)

   - Fix for an elevator drain warning with SMR devices, which is
     triggered when you switch schedulers (Damien)

   - bcache deadlock fix (Guoju Fang)

   - Fix for the block unplug tracepoint, which has had the
     timer/explicit flag reverted since 4.11 (Ilya)

   - Fix a regression in this series where the blk-mq timeout hook is
     invoked with the RCU read lock held, hence preventing it from
     blocking (Keith)

   - NVMe pull from Christoph, with a single multipath fix (Susobhan Dey)"

* tag 'for-linus-20180929' of git://git.kernel.dk/linux-block:
  xen/blkfront: correct purging of persistent grants
  Revert "xen/blkfront: When purging persistent grants, keep them in the buffer"
  blk-mq: I/O and timer unplugs are inverted in blktrace
  bcache: add separate workqueue for journal_write to avoid deadlock
  xen/blkfront: When purging persistent grants, keep them in the buffer
  block: fix deadline elevator drain for zoned block devices
  blk-mq: Allow blocking queue tag iter callbacks
  nvme: properly propagate errors in nvme_mpath_init

6 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Greg Kroah-Hartman [Sat, 29 Sep 2018 21:34:06 +0000 (14:34 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Thomas writes:
  "A single fix for the AMD memory encryption boot code so it does not
   read random garbage instead of the cached encryption bit when a kexec
   kernel is allocated above the 32bit address limit."

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/boot: Fix kexec booting failure in the SEV bit detection code

6 years agoMerge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Greg Kroah-Hartman [Sat, 29 Sep 2018 21:32:49 +0000 (14:32 -0700)]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Thomas writes:
  "Three small fixes for clocksource drivers:
   - Proper error handling in the Atmel PIT driver
   - Add CLOCK_SOURCE_SUSPEND_NONSTOP for TI SoCs so suspend works again
   - Fix the next event function for Facebook Backpack-CMM BMC chips so
     usleep(100) doesnt sleep several milliseconds"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  clocksource/drivers/timer-atmel-pit: Properly handle error cases
  clocksource/drivers/fttmr010: Fix set_next_event handler
  clocksource/drivers/ti-32k: Add CLOCK_SOURCE_SUSPEND_NONSTOP flag for non-am43 SoCs

6 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Greg Kroah-Hartman [Sat, 29 Sep 2018 18:32:03 +0000 (11:32 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Thomas writes:
  "A single fix for a missing sanity check when a pinned event is tried
  to be read on the wrong CPU due to a legit event scheduling failure."

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/core: Add sanity check to deal with pinned event failure

6 years agoMerge tag 'pm-4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Greg Kroah-Hartman [Sat, 29 Sep 2018 13:50:36 +0000 (06:50 -0700)]
Merge tag 'pm-4.19-rc6' of git://git./linux/kernel/git/rafael/linux-pm

Rafael writes:
  "Power management fix for 4.19-rc6

   Fix incorrect __init and __exit annotations in the Qualcomm
   Kryo cpufreq driver (Nathan Chancellor)."

* tag 'pm-4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq: qcom-kryo: Fix section annotations

6 years agocpufreq: qcom-kryo: Fix section annotations
Nathan Chancellor [Thu, 20 Sep 2018 00:22:21 +0000 (17:22 -0700)]
cpufreq: qcom-kryo: Fix section annotations

There is currently a warning when building the Kryo cpufreq driver into
the kernel image:

WARNING: vmlinux.o(.text+0x8aa424): Section mismatch in reference from
the function qcom_cpufreq_kryo_probe() to the function
.init.text:qcom_cpufreq_kryo_get_msm_id()
The function qcom_cpufreq_kryo_probe() references
the function __init qcom_cpufreq_kryo_get_msm_id().
This is often because qcom_cpufreq_kryo_probe lacks a __init
annotation or the annotation of qcom_cpufreq_kryo_get_msm_id is wrong.

Remove the '__init' annotation from qcom_cpufreq_kryo_get_msm_id
so that there is no more mismatch warning.

Additionally, Nick noticed that the remove function was marked as
'__init' when it should really be marked as '__exit'.

Fixes: 46e2856b8e18 (cpufreq: Add Kryo CPU scaling driver)
Fixes: 5ad7346b4ae2 (cpufreq: kryo: Add module remove and exit)
Reported-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: 4.18+ <stable@vger.kernel.org> # 4.18+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
6 years agoMerge tag 'dma-mapping-4.19-3' of git://git.infradead.org/users/hch/dma-mapping
Greg Kroah-Hartman [Sat, 29 Sep 2018 09:52:24 +0000 (02:52 -0700)]
Merge tag 'dma-mapping-4.19-3' of git://git.infradead.org/users/hch/dma-mapping

Christoph writes:
  "dma mapping fix for 4.19-rc6

   fix a missing Kconfig symbol for commits introduced in 4.19-rc"

* tag 'dma-mapping-4.19-3' of git://git.infradead.org/users/hch/dma-mapping:
  dma-mapping: add the missing ARCH_HAS_SYNC_DMA_FOR_CPU_ALL declaration

6 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Greg Kroah-Hartman [Sat, 29 Sep 2018 01:04:50 +0000 (18:04 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input

Dmitry writes:
  "Input updates for v4.19-rc5

   Just a few driver fixes"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: uinput - allow for max == min during input_absinfo validation
  Input: elantech - enable middle button of touchpad on ThinkPad P72
  Input: atakbd - fix Atari CapsLock behaviour
  Input: atakbd - fix Atari keymap
  Input: egalax_ts - add system wakeup support
  Input: gpio-keys - fix a documentation index issue

6 years agoMerge tag 'spi-fix-v4.19-rc5' of https://git.kernel.org/pub/scm/linux/kernel/git...
Greg Kroah-Hartman [Sat, 29 Sep 2018 01:04:06 +0000 (18:04 -0700)]
Merge tag 'spi-fix-v4.19-rc5' of https://git./linux/kernel/git/broonie/spi

Mark writes:
  "spi: Fixes for v4.19

   Quite a few fixes for the Renesas drivers in here, plus a fix for the
   Tegra driver and some documentation fixes for the recently added
   spi-mem code.  The Tegra fix is relatively large but fairly
   straightforward and mechanical, it runs on probe so it's been
   reasonably well covered in -next testing."

* tag 'spi-fix-v4.19-rc5' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: spi-mem: Move the DMA-able constraint doc to the kerneldoc header
  spi: spi-mem: Add missing description for data.nbytes field
  spi: rspi: Fix interrupted DMA transfers
  spi: rspi: Fix invalid SPI use during system suspend
  spi: sh-msiof: Fix handling of write value for SISTR register
  spi: sh-msiof: Fix invalid SPI use during system suspend
  spi: gpio: Fix copy-and-paste error
  spi: tegra20-slink: explicitly enable/disable clock

6 years agoMerge tag 'regulator-v4.19-rc5' of https://git.kernel.org/pub/scm/linux/kernel/git...
Greg Kroah-Hartman [Sat, 29 Sep 2018 01:02:25 +0000 (18:02 -0700)]
Merge tag 'regulator-v4.19-rc5' of https://git./linux/kernel/git/broonie/regulator

Mark writes:
  "regulator: Fixes for 4.19

   A collection of fairly minor bug fixes here, a couple of driver
   specific ones plus two core fixes.  There's one fix for the new
   suspend state code which fixes some confusion with constant values
   that are supposed to indicate noop operation and another fixing a
   race condition with the creation of sysfs files on new regulators."

* tag 'regulator-v4.19-rc5' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: fix crash caused by null driver data
  regulator: Fix 'do-nothing' value for regulators without suspend state
  regulator: da9063: fix DT probing with constraints
  regulator: bd71837: Disable voltage monitoring for LDO3/4

6 years agoMerge tag 'powerpc-4.19-3' of https://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
Greg Kroah-Hartman [Sat, 29 Sep 2018 00:43:32 +0000 (17:43 -0700)]
Merge tag 'powerpc-4.19-3' of https://git./linux/kernel/git/powerpc/linux

Michael writes:
  "powerpc fixes for 4.19 #3

   A reasonably big batch of fixes due to me being away for a few weeks.

   A fix for the TM emulation support on Power9, which could result in
   corrupting the guest r11 when running under KVM.

   Two fixes to the TM code which could lead to userspace GPR corruption
   if we take an SLB miss at exactly the wrong time.

   Our dynamic patching code had a bug that meant we could patch freed
   __init text, which could lead to corrupting userspace memory.

   csum_ipv6_magic() didn't work on little endian platforms since we
   optimised it recently.

   A fix for an endian bug when reading a device tree property telling
   us how many storage keys the machine has available.

   Fix a crash seen on some configurations of PowerVM when migrating the
   partition from one machine to another.

   A fix for a regression in the setup of our CPU to NUMA node mapping
   in KVM guests.

   A fix to our selftest Makefiles to make them work since a recent
   change to the shared Makefile logic."

* tag 'powerpc-4.19-3' of https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  selftests/powerpc: Fix Makefiles for headers_install change
  powerpc/numa: Use associativity if VPHN hcall is successful
  powerpc/tm: Avoid possible userspace r1 corruption on reclaim
  powerpc/tm: Fix userspace r13 corruption
  powerpc/pseries: Fix unitialized timer reset on migration
  powerpc/pkeys: Fix reading of ibm, processor-storage-keys property
  powerpc: fix csum_ipv6_magic() on little endian platforms
  powerpc/powernv/ioda2: Reduce upper limit for DMA window size (again)
  powerpc: Avoid code patching freed init sections
  KVM: PPC: Book3S HV: Fix guest r11 corruption with POWER9 TM workarounds

6 years agoMerge tag 'pinctrl-v4.19-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
Greg Kroah-Hartman [Sat, 29 Sep 2018 00:42:44 +0000 (17:42 -0700)]
Merge tag 'pinctrl-v4.19-4' of git://git./linux/kernel/git/linusw/linux-pinctrl

Linus writes:
  "Pin control fixes for v4.19:
   - Fixes to x86 hardware:
   - AMD interrupt debounce issues
   - Faulty Intel cannonlake register offset
   - Revert pin translation IRQ locking"

* tag 'pinctrl-v4.19-4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
  Revert "pinctrl: intel: Do pin translation when lock IRQ"
  pinctrl: cannonlake: Fix HOSTSW_OWN register offset of H variant
  pinctrl/amd: poll InterruptEnable bits in amd_gpio_irq_set_type

6 years agoperf/core: Add sanity check to deal with pinned event failure
Reinette Chatre [Wed, 19 Sep 2018 17:29:06 +0000 (10:29 -0700)]
perf/core: Add sanity check to deal with pinned event failure

It is possible that a failure can occur during the scheduling of a
pinned event. The initial portion of perf_event_read_local() contains
the various error checks an event should pass before it can be
considered valid. Ensure that the potential scheduling failure
of a pinned event is checked for and have a credible error.

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: fenghua.yu@intel.com
Cc: tony.luck@intel.com
Cc: acme@kernel.org
Cc: gavin.hindman@intel.com
Cc: jithu.joseph@intel.com
Cc: dave.hansen@intel.com
Cc: hpa@zytor.com
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/6486385d1f30336e9973b24c8c65f5079543d3d3.1537377064.git.reinette.chatre@intel.com
6 years agoblk-iolatency: keep track of previous windows stats
Josef Bacik [Fri, 28 Sep 2018 17:45:43 +0000 (13:45 -0400)]
blk-iolatency: keep track of previous windows stats

We apply a smoothing to the scale changes in order to keep sawtoothy
behavior from occurring.  However our window for checking if we've
missed our target can sometimes be lower than the smoothing interval
(500ms), especially on faster drives like ssd's.  In order to deal with
this keep track of the running tally of the previous intervals that we
threw away because we had already done a scale event recently.

This is needed for the ssd case as these low latency drives will have
bursts of latency, and if it happens to be ok for the window that
directly follows the opening of the scale window we could unthrottle
when previous windows we were missing our target.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoblk-iolatency: use a percentile approache for ssd's
Josef Bacik [Fri, 28 Sep 2018 17:45:42 +0000 (13:45 -0400)]
blk-iolatency: use a percentile approache for ssd's

We use an average latency approach for determining if we're missing our
latency target.  This works well for rotational storage where we have
generally consistent latencies, but for ssd's and other low latency
devices you have more of a spikey behavior, which means we often won't
throttle misbehaving groups because a lot of IO completes at drastically
faster times than our latency target.  Instead keep track of how many
IO's miss our target and how many IO's are done in our time window.  If
the p(90) latency is above our target then we know we need to throttle.
With this change in place we are seeing the same throttling behavior
with our testcase on ssd's as we see with rotational drives.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoblk-iolatency: deal with small samples
Josef Bacik [Fri, 28 Sep 2018 17:45:41 +0000 (13:45 -0400)]
blk-iolatency: deal with small samples

There is logic to keep cgroups that haven't done a lot of IO in the most
recent scale window from being punished for over-active higher priority
groups.  However for things like ssd's where the windows are pretty
short we'll end up with small numbers of samples, so 5% of samples will
come out to 0 if there aren't enough.  Make the floor 1 sample to keep
us from improperly bailing out of scaling down.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoblk-iolatency: deal with nr_requests == 1
Josef Bacik [Fri, 28 Sep 2018 17:45:40 +0000 (13:45 -0400)]
blk-iolatency: deal with nr_requests == 1

Hitting the case where blk_queue_depth() returned 1 uncovered the fact
that iolatency doesn't actually handle this case properly, it simply
doesn't scale down anybody.  For this case we should go straight into
applying the time delay, which we weren't doing.  Since we already limit
the floor at 1 request this if statement is not needed, and this allows
us to set our depth to 1 which allows us to apply the delay if needed.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoblk-iolatency: use q->nr_requests directly
Josef Bacik [Fri, 28 Sep 2018 17:45:39 +0000 (13:45 -0400)]
blk-iolatency: use q->nr_requests directly

We were using blk_queue_depth() assuming that it would return
nr_requests, but we hit a case in production on drives that had to have
NCQ turned off in order for them to not shit the bed which resulted in a
qd of 1, even though the nr_requests was much larger.  iolatency really
only cares about requests we are allowed to queue up, as any io that
get's onto the request list is going to be serviced soonish, so we want
to be throttling before the bio gets onto the request list.  To make
iolatency work as expected, simply use q->nr_requests instead of
blk_queue_depth() as that is what we actually care about.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoMerge tag 'drm-fixes-2018-09-28' of git://anongit.freedesktop.org/drm/drm
Greg Kroah-Hartman [Fri, 28 Sep 2018 16:55:17 +0000 (18:55 +0200)]
Merge tag 'drm-fixes-2018-09-28' of git://anongit.freedesktop.org/drm/drm

Dave writes:
  "drm fixes for 4.19-rc6

   Looks like a pretty normal week for graphics,

   core: syncobj fix, panel link regression revert
   amd: suspend/resume fixes, EDID emulation fix
   mali-dp: NV12 writeback and vblank reset fixes
   etnaviv: DMA setup fix"

* tag 'drm-fixes-2018-09-28' of git://anongit.freedesktop.org/drm/drm:
  drm/amd/display: Fix Edid emulation for linux
  drm/amd/display: Fix Vega10 lightup on S3 resume
  drm/amdgpu: Fix vce work queue was not cancelled when suspend
  Revert "drm/panel: Add device_link from panel device to DRM device"
  drm/syncobj: Don't leak fences when WAIT_FOR_SUBMIT is set
  drm/malidp: Fix writeback in NV12
  drm: mali-dp: Call drm_crtc_vblank_reset on device init
  drm/etnaviv: add DMA configuration for etnaviv platform device

6 years agoMerge tag 'riscv-for-linus-4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel...
Greg Kroah-Hartman [Fri, 28 Sep 2018 16:53:22 +0000 (18:53 +0200)]
Merge tag 'riscv-for-linus-4.19-rc6' of git://git./linux/kernel/git/palmer/riscv-linux

Palmer writes:
  "A Single RISC-V Update for 4.19-rc6

   The Debian guys have been pushing on our port and found some
   unversioned symbols leaking into modules.  This PR contains a single
   fix for that issue."

* tag 'riscv-for-linus-4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux:
  RISC-V: include linux/ftrace.h in asm-prototypes.h

6 years agokyber: fix integer overflow of latency targets on 32-bit
Omar Sandoval [Fri, 28 Sep 2018 16:22:50 +0000 (09:22 -0700)]
kyber: fix integer overflow of latency targets on 32-bit

NSEC_PER_SEC has type long, so 5 * NSEC_PER_SEC is calculated as a long.
However, 5 seconds is 5,000,000,000 nanoseconds, which overflows a
32-bit long. Make sure all of the targets are calculated as 64-bit
values.

Fixes: 6e25cb01ea20 ("kyber: implement improved heuristics")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoMerge tag 'pci-v4.19-fixes-2' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git...
Greg Kroah-Hartman [Fri, 28 Sep 2018 16:20:41 +0000 (18:20 +0200)]
Merge tag 'pci-v4.19-fixes-2' of ssh://gitolite./linux/kernel/git/helgaas/pci

Bjorn writes:
  "PCI fixes:

  - Fix ACPI hotplug issue that causes black screen crash at boot (Mika
    Westerberg)

  - Fix DesignWare "scheduling while atomic" issues (Jisheng Zhang)

  - Add PPC contacts to MAINTAINERS for PCI core error handling (Bjorn
    Helgaas)

  - Sort Mobiveil MAINTAINERS entry (Lorenzo Pieralisi)"

* tag 'pci-v4.19-fixes-2' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  ACPI / hotplug / PCI: Don't scan for non-hotplug bridges if slot is not bridge
  PCI: dwc: Fix scheduling while atomic issues
  MAINTAINERS: Move mobiveil PCI driver entry where it belongs
  MAINTAINERS: Update PPC contacts for PCI core error handling

6 years agoMerge branch 'nvme-4.19' of git://git.infradead.org/nvme into for-linus
Jens Axboe [Fri, 28 Sep 2018 15:41:40 +0000 (09:41 -0600)]
Merge branch 'nvme-4.19' of git://git.infradead.org/nvme into for-linus

Pull NVMe fix from Christoph.

* 'nvme-4.19' of git://git.infradead.org/nvme:
  nvme: properly propagate errors in nvme_mpath_init

6 years agoxen/blkfront: correct purging of persistent grants
Juergen Gross [Fri, 28 Sep 2018 07:28:27 +0000 (09:28 +0200)]
xen/blkfront: correct purging of persistent grants

Commit a46b53672b2c2e3770b38a4abf90d16364d2584b ("xen/blkfront: cleanup
stale persistent grants") introduced a regression as purged persistent
grants were not pu into the list of free grants again. Correct that.

Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoRevert "xen/blkfront: When purging persistent grants, keep them in the buffer"
Jens Axboe [Fri, 28 Sep 2018 15:40:17 +0000 (09:40 -0600)]
Revert "xen/blkfront: When purging persistent grants, keep them in the buffer"

Fix didn't work for all cases, reverting to add a (hopefully)
better fix.

This reverts commit f151ba989d149bbdfc90e5405724bbea094f9b17.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agovirtio-blk: modernize sysfs attribute creation
Hannes Reinecke [Fri, 28 Sep 2018 06:17:23 +0000 (08:17 +0200)]
virtio-blk: modernize sysfs attribute creation

Use new-style DEVICE_ATTR_RO/DEVICE_ATTR_RW to create the sysfs attributes
and register the disk with default sysfs attribute groups.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agozram: register default groups with device_add_disk()
Hannes Reinecke [Fri, 28 Sep 2018 06:17:22 +0000 (08:17 +0200)]
zram: register default groups with device_add_disk()

Register default sysfs groups during device_add_disk() to avoid a
race condition with udev during startup.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoaoe: register default groups with device_add_disk()
Hannes Reinecke [Fri, 28 Sep 2018 06:17:21 +0000 (08:17 +0200)]
aoe: register default groups with device_add_disk()

Register default sysfs groups during device_add_disk() to avoid a
race condition with udev during startup.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Ed L. Cachin <ed.cashin@acm.org>
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agonvme: register ns_id attributes as default sysfs groups
Hannes Reinecke [Fri, 28 Sep 2018 06:17:20 +0000 (08:17 +0200)]
nvme: register ns_id attributes as default sysfs groups

We should be registering the ns_id attribute as default sysfs
attribute groups, otherwise we have a race condition between
the uevent and the attributes appearing in sysfs.

Suggested-by: Bart van Assche <bvanassche@acm.org>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoblock: genhd: add 'groups' argument to device_add_disk
Hannes Reinecke [Fri, 28 Sep 2018 06:17:19 +0000 (08:17 +0200)]
block: genhd: add 'groups' argument to device_add_disk

Update device_add_disk() to take an 'groups' argument so that
individual drivers can register a device with additional sysfs
attributes.
This avoids race condition the driver would otherwise have if these
groups were to be created with sysfs_add_groups().

Signed-off-by: Martin Wilck <martin.wilck@suse.com>
Signed-off-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoselftests/powerpc: Fix Makefiles for headers_install change
Michael Ellerman [Fri, 28 Sep 2018 04:53:18 +0000 (14:53 +1000)]
selftests/powerpc: Fix Makefiles for headers_install change

Commit b2d35fa5fc80 ("selftests: add headers_install to lib.mk")
introduced a requirement that Makefiles more than one level below the
selftests directory need to define top_srcdir, but it didn't update
any of the powerpc Makefiles.

This broke building all the powerpc selftests with eg:

  make[1]: Entering directory '/src/linux/tools/testing/selftests/powerpc'
  BUILD_TARGET=/src/linux/tools/testing/selftests/powerpc/alignment; mkdir -p $BUILD_TARGET; make OUTPUT=$BUILD_TARGET -k -C alignment all
  make[2]: Entering directory '/src/linux/tools/testing/selftests/powerpc/alignment'
  ../../lib.mk:20: ../../../../scripts/subarch.include: No such file or directory
  make[2]: *** No rule to make target '../../../../scripts/subarch.include'.
  make[2]: Failed to remake makefile '../../../../scripts/subarch.include'.
  Makefile:38: recipe for target 'alignment' failed

Fix it by setting top_srcdir in the affected Makefiles.

Fixes: b2d35fa5fc80 ("selftests: add headers_install to lib.mk")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
6 years agokyber: add tracepoints
Omar Sandoval [Thu, 27 Sep 2018 22:55:55 +0000 (15:55 -0700)]
kyber: add tracepoints

When debugging Kyber, it's really useful to know what latencies we've
been having, how the domain depths have been adjusted, and if we've
actually been throttling. Add three tracepoints, kyber_latency,
kyber_adjust, and kyber_throttled, to record that.

Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agokyber: implement improved heuristics
Omar Sandoval [Thu, 27 Sep 2018 22:55:54 +0000 (15:55 -0700)]
kyber: implement improved heuristics

Kyber's current heuristics have a few flaws:

- It's based on the mean latency, but p99 latency tends to be more
  meaningful to anyone who cares about latency. The mean can also be
  skewed by rare outliers that the scheduler can't do anything about.
- The statistics calculations are purely time-based with a short window.
  This works for steady, high load, but is more sensitive to outliers
  with bursty workloads.
- It only considers the latency once an I/O has been submitted to the
  device, but the user cares about the time spent in the kernel, as
  well.

These are shortcomings of the generic blk-stat code which doesn't quite
fit the ideal use case for Kyber. So, this replaces the statistics with
a histogram used to calculate percentiles of total latency and I/O
latency, which we then use to adjust depths in a slightly more
intelligent manner:

- Sync and async writes are now the same domain.
- Discards are a separate domain.
- Domain queue depths are scaled by the ratio of the p99 total latency
  to the target latency (e.g., if the p99 latency is double the target
  latency, we will double the queue depth; if the p99 latency is half of
  the target latency, we can halve the queue depth).
- We use the I/O latency to determine whether we should scale queue
  depths down: we will only scale down if any domain's I/O latency
  exceeds the target latency, which is an indicator of congestion in the
  device.

These new heuristics are just as scalable as the heuristics they
replace.

Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agokyber: don't make domain token sbitmap larger than necessary
Omar Sandoval [Thu, 27 Sep 2018 22:55:53 +0000 (15:55 -0700)]
kyber: don't make domain token sbitmap larger than necessary

The domain token sbitmaps are currently initialized to the device queue
depth or 256, whichever is larger, and immediately resized to the
maximum depth for that domain (256, 128, or 64 for read, write, and
other, respectively). The sbitmap is never resized larger than that, so
it's unnecessary to allocate a bitmap larger than the maximum depth.
Let's just allocate it to the maximum depth to begin with. This will use
marginally less memory, and more importantly, give us a more appropriate
number of bits per sbitmap word.

Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoblock: export blk_stat_enable_accounting()
Omar Sandoval [Thu, 27 Sep 2018 22:55:52 +0000 (15:55 -0700)]
block: export blk_stat_enable_accounting()

Kyber will need this in a future change if it is built as a module.

Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoblock: move call of scheduler's ->completed_request() hook
Omar Sandoval [Thu, 27 Sep 2018 22:55:51 +0000 (15:55 -0700)]
block: move call of scheduler's ->completed_request() hook

Commit 4bc6339a583c ("block: move blk_stat_add() to
__blk_mq_end_request()") consolidated some calls using ktime_get() so
we'd only need to call it once. Kyber's ->completed_request() hook also
calls ktime_get(), so let's move it to the same place, too.

Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoMerge branch 'drm-fixes-4.19' of git://people.freedesktop.org/~agd5f/linux into drm...
Dave Airlie [Thu, 27 Sep 2018 23:30:11 +0000 (09:30 +1000)]
Merge branch 'drm-fixes-4.19' of git://people.freedesktop.org/~agd5f/linux into drm-fixes

Just a few fixes for 4.19:
- Couple of suspend/resume fixes
- Fix EDID emulation with DC

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexdeucher@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180927155418.2813-1-alexander.deucher@amd.com
6 years agoMerge tag 'drm-misc-fixes-2018-09-27-1' of git://anongit.freedesktop.org/drm/drm...
Dave Airlie [Thu, 27 Sep 2018 23:25:26 +0000 (09:25 +1000)]
Merge tag 'drm-misc-fixes-2018-09-27-1' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

- Revert adding device-link to panels
- Don't leak fences in drm/syncobj

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Sean Paul <sean@poorly.run>
Link: https://patchwork.freedesktop.org/patch/msgid/20180927152712.GA53076@art_vandelay
6 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
Greg Kroah-Hartman [Thu, 27 Sep 2018 19:53:55 +0000 (21:53 +0200)]
Merge tag 'for-linus' of git://git./linux/kernel/git/rdma/rdma

Jason writes:
  "Second RDMA rc pull request

   - Fix a long standing race bug when destroying comp_event file descriptors

   - srp, hfi1, bnxt_re: Various driver crashes from missing validation
     and other cases

   - Fixes for regressions in patches merged this window in the gid
     cache, devx, ucma and uapi."

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
  RDMA/core: Set right entry state before releasing reference
  IB/mlx5: Destroy the DEVX object upon error flow
  IB/uverbs: Free uapi on destroy
  RDMA/bnxt_re: Fix system crash during RDMA resource initialization
  IB/hfi1: Fix destroy_qp hang after a link down
  IB/hfi1: Fix context recovery when PBC has an UnsupportedVL
  IB/hfi1: Invalid user input can result in crash
  IB/hfi1: Fix SL array bounds check
  RDMA/uverbs: Fix validity check for modify QP
  IB/srp: Avoid that sg_reset -d ${srp_device} triggers an infinite loop
  ucma: fix a use-after-free in ucma_resolve_ip()
  RDMA/uverbs: Atomically flush and mark closed the comp event queue
  cxgb4: fix abort_req_rss6 struct

6 years agoMerge tag 'for_v4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Greg Kroah-Hartman [Thu, 27 Sep 2018 19:16:24 +0000 (21:16 +0200)]
Merge tag 'for_v4.19-rc6' of git://git./linux/kernel/git/jack/linux-fs

Jan writes:
  "an ext2 patch fixing fsync(2) for DAX mounts."

* tag 'for_v4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  ext2, dax: set ext2_dax_aops for dax files

6 years agoblk-mq: I/O and timer unplugs are inverted in blktrace
Ilya Dryomov [Wed, 26 Sep 2018 12:35:50 +0000 (14:35 +0200)]
blk-mq: I/O and timer unplugs are inverted in blktrace

trace_block_unplug() takes true for explicit unplugs and false for
implicit unplugs.  schedule() unplugs are implicit and should be
reported as timer unplugs.  While correct in the legacy code, this has
been inverted in blk-mq since 4.11.

Cc: stable@vger.kernel.org
Fixes: bd166ef183c2 ("blk-mq-sched: add framework for MQ capable IO schedulers")
Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agodax: Fix deadlock in dax_lock_mapping_entry()
Jan Kara [Thu, 27 Sep 2018 11:23:32 +0000 (13:23 +0200)]
dax: Fix deadlock in dax_lock_mapping_entry()

When dax_lock_mapping_entry() has to sleep to obtain entry lock, it will
fail to unlock mapping->i_pages spinlock and thus immediately deadlock
against itself when retrying to grab the entry lock again. Fix the
problem by unlocking mapping->i_pages before retrying.

Fixes: c2a7d2a11552 ("filesystem-dax: Introduce dax_lock_mapping_entry()")
Reported-by: Barret Rhoden <brho@google.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
6 years agox86/boot: Fix kexec booting failure in the SEV bit detection code
Kairui Song [Thu, 27 Sep 2018 12:38:45 +0000 (20:38 +0800)]
x86/boot: Fix kexec booting failure in the SEV bit detection code

Commit

  1958b5fc4010 ("x86/boot: Add early boot support when running with SEV active")

can occasionally cause system resets when kexec-ing a second kernel even
if SEV is not active.

That's because get_sev_encryption_bit() uses 32-bit rIP-relative
addressing to read the value of enc_bit - a variable which caches a
previously detected encryption bit position - but kexec may allocate
the early boot code to a higher location, beyond the 32-bit addressing
limit.

In this case, garbage will be read and get_sev_encryption_bit() will
return the wrong value, leading to accessing memory with the wrong
encryption setting.

Therefore, remove enc_bit, and thus get rid of the need to do 32-bit
rIP-relative addressing in the first place.

 [ bp: massage commit message heavily. ]

Fixes: 1958b5fc4010 ("x86/boot: Add early boot support when running with SEV active")
Suggested-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Kairui Song <kasong@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Cc: linux-kernel@vger.kernel.org
Cc: tglx@linutronix.de
Cc: mingo@redhat.com
Cc: hpa@zytor.com
Cc: brijesh.singh@amd.com
Cc: kexec@lists.infradead.org
Cc: dyoung@redhat.com
Cc: bhe@redhat.com
Cc: ghook@redhat.com
Link: https://lkml.kernel.org/r/20180927123845.32052-1-kasong@redhat.com
6 years agobcache: add separate workqueue for journal_write to avoid deadlock
Guoju Fang [Thu, 27 Sep 2018 15:41:46 +0000 (23:41 +0800)]
bcache: add separate workqueue for journal_write to avoid deadlock

After write SSD completed, bcache schedules journal_write work to
system_wq, which is a public workqueue in system, without WQ_MEM_RECLAIM
flag. system_wq is also a bound wq, and there may be no idle kworker on
current processor. Creating a new kworker may unfortunately need to
reclaim memory first, by shrinking cache and slab used by vfs, which
depends on bcache device. That's a deadlock.

This patch create a new workqueue for journal_write with WQ_MEM_RECLAIM
flag. It's rescuer thread will work to avoid the deadlock.

Signed-off-by: Guoju Fang <fangguoju@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agodrm/amd/display: Fix Edid emulation for linux
Bhawanpreet Lakha [Wed, 26 Sep 2018 17:42:10 +0000 (13:42 -0400)]
drm/amd/display: Fix Edid emulation for linux

[Why]
EDID emulation didn't work properly for linux, as we stop programming
if nothing is connected physically.

[How]
We get a flag from DRM when we want to do edid emulation. We check if
this flag is true and nothing is connected physically, if so we only
program the front end using VIRTUAL_SIGNAL.

Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
6 years agodrm/amd/display: Fix Vega10 lightup on S3 resume
Roman Li [Wed, 26 Sep 2018 17:42:16 +0000 (13:42 -0400)]
drm/amd/display: Fix Vega10 lightup on S3 resume

[Why]
There have been a few reports of Vega10 display remaining blank
after S3 resume. The regression is caused by workaround for mode
change on Vega10 - skip set_bandwidth if stream count is 0.
As a result we skipped dispclk reset on suspend, thus on resume
we may skip the clock update assuming it hasn't been changed.
On some systems it causes display blank or 'out of range'.

[How]
Revert "drm/amd/display: Fix Vega10 black screen after mode change"
Verified that it hadn't cause mode change regression.

Signed-off-by: Roman Li <Roman.Li@amd.com>
Reviewed-by: Sun peng Li <Sunpeng.Li@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
6 years agodrm/amdgpu: Fix vce work queue was not cancelled when suspend
Rex Zhu [Thu, 27 Sep 2018 12:48:39 +0000 (20:48 +0800)]
drm/amdgpu: Fix vce work queue was not cancelled when suspend

The vce cancel_delayed_work_sync never be called.
driver call the function in error path.

This caused the A+A suspend hang when runtime pm enebled.
As we will visit the smu in the idle queue. this will cause
smu hang because the dgpu has been suspend, and the dgpu also
will be waked up. As the smu has been hang, so the dgpu resume
will failed.

Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Feifei Xu <Feifei.Xu@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
6 years agoRevert "drm/panel: Add device_link from panel device to DRM device"
Linus Walleij [Thu, 27 Sep 2018 12:41:30 +0000 (14:41 +0200)]
Revert "drm/panel: Add device_link from panel device to DRM device"

This reverts commit 0c08754b59da5557532d946599854e6df28edc22.

commit 0c08754b59da
("drm/panel: Add device_link from panel device to DRM device")
creates a circular dependency under these circumstances:

1. The panel depends on dsi-host because it is MIPI-DSI child
   device.
2. dsi-host depends on the drm parent device (connector->dev->dev)
   this should be allowed.
3. drm parent dev (connector->dev->dev) depends on the panel
   after this patch.

This makes the dependency circular and while it appears it
does not affect any in-tree drivers (they do not seem to have
dsi hosts depending on the same parent device) this does not
seem right.

As noted in a response from Andrzej Hajda, the intent is
likely to make the panel dependent on the DRM device
(connector->dev) not its parent. But we have no way of
doing that since the DRM device doesn't contain any
struct device on its own (arguably it should).

Revert this until a proper approach is figured out.

Cc: Jyri Sarha <jsarha@ti.com>
Cc: Eric Anholt <eric@anholt.net>
Cc: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180927124130.9102-1-linus.walleij@linaro.org
6 years agoMerge branch 'clockevents/4.19-fixes' of https://git.linaro.org/people/daniel.lezcano...
Thomas Gleixner [Thu, 27 Sep 2018 14:50:22 +0000 (16:50 +0200)]
Merge branch 'clockevents/4.19-fixes' of https://git.linaro.org/people/daniel.lezcano/linux into timers/urgent

Pull another fix from Daniel Lezcano, which felt through the cracks:

 - Fix a potential memory leak reported by smatch in the atmel timer driver

6 years agoxen/blkfront: When purging persistent grants, keep them in the buffer
Boris Ostrovsky [Sat, 22 Sep 2018 19:55:49 +0000 (15:55 -0400)]
xen/blkfront: When purging persistent grants, keep them in the buffer

Commit a46b53672b2c ("xen/blkfront: cleanup stale persistent grants")
added support for purging persistent grants when they are not in use. As
part of the purge, the grants were removed from the grant buffer, This
eventually causes the buffer to become empty, with BUG_ON triggered in
get_free_grant(). This can be observed even on an idle system, within
20-30 minutes.

We should keep the grants in the buffer when purging, and only free the
grant ref.

Fixes: a46b53672b2c ("xen/blkfront: cleanup stale persistent grants")
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoclocksource/drivers/timer-atmel-pit: Properly handle error cases
Alexandre Belloni [Wed, 25 Apr 2018 10:14:39 +0000 (12:14 +0200)]
clocksource/drivers/timer-atmel-pit: Properly handle error cases

The smatch utility reports a possible leak:

smatch warnings:
drivers/clocksource/timer-atmel-pit.c:183 at91sam926x_pit_dt_init() warn: possible memory leak of 'data'

Ensure data is freed before exiting with an error.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
6 years agoblock: fix deadline elevator drain for zoned block devices
Damien Le Moal [Thu, 27 Sep 2018 01:55:13 +0000 (10:55 +0900)]
block: fix deadline elevator drain for zoned block devices

When the deadline scheduler is used with a zoned block device, writes
to a zone will be dispatched one at a time. This causes the warning
message:

deadline: forced dispatching is broken (nr_sorted=X), please report this

to be displayed when switching to another elevator with the legacy I/O
path while write requests to a zone are being retained in the scheduler
queue.

Prevent this message from being displayed when executing
elv_drain_elevator() for a zoned block device. __blk_drain_queue() will
loop until all writes are dispatched and completed, resulting in the
desired elevator queue drain without extensive modifications to the
deadline code itself to handle forced-dispatch calls.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Fixes: 8dc8146f9c92 ("deadline-iosched: Introduce zone locking support")
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoMerge branch 'for-upstream/malidp-fixes' of git://linux-arm.org/linux-ld into drm...
Dave Airlie [Thu, 27 Sep 2018 00:49:44 +0000 (10:49 +1000)]
Merge branch 'for-upstream/malidp-fixes' of git://linux-arm.org/linux-ld into drm-fixes

Fix NV12 writeback and fix vblank reset.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Liviu Dudau <Liviu.Dudau@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180921112354.GR936@e110455-lin.cambridge.arm.com
6 years agoMerge branch 'etnaviv/fixes' of https://git.pengutronix.de/git/lst/linux into drm...
Dave Airlie [Thu, 27 Sep 2018 00:19:26 +0000 (10:19 +1000)]
Merge branch 'etnaviv/fixes' of https://git.pengutronix.de/git/lst/linux into drm-fixes

one fix to get a proper DMA configuration in place for the etnaviv
virtual device. I'm sending this as a fix, as a dma-mapping change at
the ARC architecture side during the 4.19 cycle broke etnaviv on this
platform, which gets remedied with this patch, but it also enables
ARM64.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Lucas Stach <l.stach@pengutronix.de>
Link: https://patchwork.freedesktop.org/patch/msgid/ea1f712bf09bf9439c6b092bf2c2bde7bb01cf5e.camel@pengutronix.de
6 years agoblk-mq: Enable support for runtime power management
Bart Van Assche [Wed, 26 Sep 2018 21:01:10 +0000 (14:01 -0700)]
blk-mq: Enable support for runtime power management

Now that the blk-mq core processes power management requests
(marked with RQF_PREEMPT) in other states than RPM_ACTIVE, enable
runtime power management for blk-mq.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Jianchao Wang <jianchao.w.wang@oracle.com>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoblock: Make blk_get_request() block for non-PM requests while suspended
Bart Van Assche [Wed, 26 Sep 2018 21:01:09 +0000 (14:01 -0700)]
block: Make blk_get_request() block for non-PM requests while suspended

Instead of allowing requests that are not power management requests
to enter the queue in runtime suspended status (RPM_SUSPENDED), make
the blk_get_request() caller block. This change fixes a starvation
issue: it is now guaranteed that power management requests will be
executed no matter how many blk_get_request() callers are waiting.
For blk-mq, instead of maintaining the q->nr_pending counter, rely
on q->q_usage_counter. Call pm_runtime_mark_last_busy() every time a
request finishes instead of only if the queue depth drops to zero.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Jianchao Wang <jianchao.w.wang@oracle.com>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoblock: Allow unfreezing of a queue while requests are in progress
Bart Van Assche [Wed, 26 Sep 2018 21:01:08 +0000 (14:01 -0700)]
block: Allow unfreezing of a queue while requests are in progress

A later patch will call blk_freeze_queue_start() followed by
blk_mq_unfreeze_queue() without waiting for q_usage_counter to drop
to zero. Make sure that this doesn't cause a kernel warning to appear
by switching from percpu_ref_reinit() to percpu_ref_resurrect(). The
former namely requires that the refcount it operates on is zero.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Jianchao Wang <jianchao.w.wang@oracle.com>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agopercpu-refcount: Introduce percpu_ref_resurrect()
Bart Van Assche [Wed, 26 Sep 2018 21:01:07 +0000 (14:01 -0700)]
percpu-refcount: Introduce percpu_ref_resurrect()

This function will be used in a later patch to switch the struct
request_queue q_usage_counter from killed back to live. In contrast
to percpu_ref_reinit(), this new function does not require that the
refcount is zero.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Jianchao Wang <jianchao.w.wang@oracle.com>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoblock: Schedule runtime resume earlier
Bart Van Assche [Wed, 26 Sep 2018 21:01:06 +0000 (14:01 -0700)]
block: Schedule runtime resume earlier

Instead of scheduling runtime resume of a request queue after a
request has been queued, schedule asynchronous resume during request
allocation. The new pm_request_resume() calls occur after
blk_queue_enter() has increased the q_usage_counter request queue
member. This change is needed for a later patch that will make request
allocation block while the queue status is not RPM_ACTIVE.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Jianchao Wang <jianchao.w.wang@oracle.com>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoblock: Split blk_pm_add_request() and blk_pm_put_request()
Bart Van Assche [Wed, 26 Sep 2018 21:01:05 +0000 (14:01 -0700)]
block: Split blk_pm_add_request() and blk_pm_put_request()

Move the pm_request_resume() and pm_runtime_mark_last_busy() calls into
two new functions and thereby separate legacy block layer code from code
that works for both the legacy block layer and blk-mq. A later patch will
add calls to the new functions in the blk-mq code.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Jianchao Wang <jianchao.w.wang@oracle.com>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoblock, scsi: Change the preempt-only flag into a counter
Bart Van Assche [Wed, 26 Sep 2018 21:01:04 +0000 (14:01 -0700)]
block, scsi: Change the preempt-only flag into a counter

The RQF_PREEMPT flag is used for three purposes:
- In the SCSI core, for making sure that power management requests
  are executed even if a device is in the "quiesced" state.
- For domain validation by SCSI drivers that use the parallel port.
- In the IDE driver, for IDE preempt requests.
Rename "preempt-only" into "pm-only" because the primary purpose of
this mode is power management. Since the power management core may
but does not have to resume a runtime suspended device before
performing system-wide suspend and since a later patch will set
"pm-only" mode as long as a block device is runtime suspended, make
it possible to set "pm-only" mode from more than one context. Since
with this change scsi_device_quiesce() is no longer idempotent, make
that function return early if it is called for a quiesced queue.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Cc: Jianchao Wang <jianchao.w.wang@oracle.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoblock: Move power management code into a new source file
Bart Van Assche [Wed, 26 Sep 2018 21:01:03 +0000 (14:01 -0700)]
block: Move power management code into a new source file

Move the code for runtime power management from blk-core.c into the
new source file blk-pm.c. Move the corresponding declarations from
<linux/blkdev.h> into <linux/blk-pm.h>. For CONFIG_PM=n, leave out
the declarations of the functions that are not used in that mode.
This patch not only reduces the number of #ifdefs in the block layer
core code but also reduces the size of header file <linux/blkdev.h>
and hence should help to reduce the build time of the Linux kernel
if CONFIG_PM is not defined.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Jianchao Wang <jianchao.w.wang@oracle.com>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoACPI / hotplug / PCI: Don't scan for non-hotplug bridges if slot is not bridge
Mika Westerberg [Wed, 26 Sep 2018 20:39:28 +0000 (15:39 -0500)]
ACPI / hotplug / PCI: Don't scan for non-hotplug bridges if slot is not bridge

HP 6730b laptop has an ethernet NIC connected to one of the PCIe root
ports.  The root ports themselves are native PCIe hotplug capable.  Now,
during boot after PCI devices are scanned the BIOS triggers ACPI bus check
directly to the NIC:

  ACPI: \_SB_.PCI0.RP06.NIC_: Bus check in hotplug_event()

It is not clear why it is sending bus check but regardless the ACPI hotplug
notify handler calls enable_slot() directly (instead of going through
acpiphp_check_bridge() as there is no bridge), which ends up handling
special case for non-hotplug bridges with native PCIe hotplug.  This
results a crash of some kind but the reporter only sees black screen so it
is hard to figure out the exact spot and what actually happens.  Based on
a few fix proposals it was tracked to crash somewhere inside
pci_assign_unassigned_bridge_resources().

In any case we should not really be in that special branch at all because
the ACPI notify happened to a slot that is not a PCI bridge (it is just a
regular PCI device).

Fix this so that we only go to that special branch if we are calling
enable_slot() for a bridge (e.g., the ACPI notification was for the
bridge).

Link: https://bugzilla.kernel.org/show_bug.cgi?id=201127
Fixes: 84c8b58ed3ad ("ACPI / hotplug / PCI: Don't scan bridges managed by native hotplug")
Reported-by: Peter Anemone <peter.anemone@gmail.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
CC: stable@vger.kernel.org # v4.18+
6 years agoxen: don't include <xen/xen.h> from <asm/io.h> and <asm/dma-mapping.h>
Christoph Hellwig [Tue, 25 Sep 2018 20:30:09 +0000 (13:30 -0700)]
xen: don't include <xen/xen.h> from <asm/io.h> and <asm/dma-mapping.h>

Nothing Xen specific in these headers, which get included from a lot
of code in the kernel.  So prune the includes and move them to the
Xen-specific files that actually use them instead.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoblock: remove ARCH_BIOVEC_PHYS_MERGEABLE
Christoph Hellwig [Tue, 25 Sep 2018 20:30:08 +0000 (13:30 -0700)]
block: remove ARCH_BIOVEC_PHYS_MERGEABLE

Take the Xen check into the core code instead of delegating it to
the architectures.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoxen: provide a prototype for xen_biovec_phys_mergeable in xen.h
Christoph Hellwig [Tue, 25 Sep 2018 20:30:07 +0000 (13:30 -0700)]
xen: provide a prototype for xen_biovec_phys_mergeable in xen.h

Having multiple externs in arch headers is not a good way to provide
a common interface.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoxen: remove the xen_biovec_phys_mergeable export
Christoph Hellwig [Tue, 25 Sep 2018 20:30:06 +0000 (13:30 -0700)]
xen: remove the xen_biovec_phys_mergeable export

BIOVEC_PHYS_MERGEABLE is only called from core block code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agoarm: remove the unused BIOVEC_MERGEABLE define
Christoph Hellwig [Tue, 25 Sep 2018 20:30:05 +0000 (13:30 -0700)]
arm: remove the unused BIOVEC_MERGEABLE define

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agodrm/syncobj: Don't leak fences when WAIT_FOR_SUBMIT is set
Jason Ekstrand [Wed, 26 Sep 2018 07:17:03 +0000 (02:17 -0500)]
drm/syncobj: Don't leak fences when WAIT_FOR_SUBMIT is set

We attempt to get fences earlier in the hopes that everything will
already have fences and no callbacks will be needed.  If we do succeed
in getting a fence, getting one a second time will result in a duplicate
ref with no unref.  This is causing memory leaks in Vulkan applications
that create a lot of fences; playing for a few hours can, apparently,
bring down the system.

Cc: stable@vger.kernel.org
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107899
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180926071703.15257-1-jason.ekstrand@intel.com
6 years agoMerge tag 'iommu-fixes-v4.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git...
Greg Kroah-Hartman [Wed, 26 Sep 2018 11:08:53 +0000 (13:08 +0200)]
Merge tag 'iommu-fixes-v4.19-rc5' of git://git./linux/kernel/git/joro/iommu

Joerg writes:
  "IOMMU Fixes for Linux v4.19-rc5

   Three fixes queued up:

- Warning fix for Rockchip IOMMU where there were IRQ handlers
  for offlined hardware.

- Fix for Intel VT-d because recent changes caused boot failures
  on some machines because it tried to allocate to much
  contiguous memory.

- Fix for AMD IOMMU to handle eMMC devices correctly that appear
  as ACPI HID devices."

* tag 'iommu-fixes-v4.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/amd: Return devid as alias for ACPI HID devices
  iommu/vt-d: Handle memory shortage on pasid table allocation
  iommu/rockchip: Free irqs in shutdown handler

6 years agoiommu/amd: Return devid as alias for ACPI HID devices
Arindam Nath [Tue, 18 Sep 2018 10:10:58 +0000 (15:40 +0530)]
iommu/amd: Return devid as alias for ACPI HID devices

ACPI HID devices do not actually have an alias for
them in the IVRS. But dev_data->alias is still used
for indexing into the IOMMU device table for devices
being handled by the IOMMU. So for ACPI HID devices,
we simply return the corresponding devid as an alias,
as parsed from IVRS table.

Signed-off-by: Arindam Nath <arindam.nath@amd.com>
Fixes: 2bf9a0a12749 ('iommu/amd: Add iommu support for ACPI HID devices')
Signed-off-by: Joerg Roedel <jroedel@suse.de>
6 years agoblk-mq: Allow blocking queue tag iter callbacks
Keith Busch [Tue, 25 Sep 2018 16:36:20 +0000 (10:36 -0600)]
blk-mq: Allow blocking queue tag iter callbacks

A recent commit runs tag iterator callbacks under the rcu read lock,
but existing callbacks do not satisfy the non-blocking requirement.
The commit intended to prevent an iterator from accessing a queue that's
being modified. This patch fixes the original issue by taking a queue
reference instead of reading it, which allows callbacks to make blocking
calls.

Fixes: f5bbbbe4d6357 ("blk-mq: sync the update nr_hw_queues with blk_mq_queue_tag_busy_iter")
Acked-by: Jianchao Wang <jianchao.w.wang@oracle.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
6 years agonvme: properly propagate errors in nvme_mpath_init
Susobhan Dey [Tue, 25 Sep 2018 19:29:15 +0000 (12:29 -0700)]
nvme: properly propagate errors in nvme_mpath_init

Signed-off-by: Susobhan Dey <susobhan.dey@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>