platform/adaptation/renesas_rcar/renesas_kernel.git
11 years agokvm/ppc/booke64: Fix lazy ee handling in kvmppc_handle_exit()
Scott Wood [Fri, 7 Jun 2013 00:16:32 +0000 (19:16 -0500)]
kvm/ppc/booke64: Fix lazy ee handling in kvmppc_handle_exit()

EE is hard-disabled on entry to kvmppc_handle_exit(), so call
hard_irq_disable() so that PACA_IRQ_HARD_DIS is set, and soft_enabled
is unset.

Without this, we get warnings such as arch/powerpc/kernel/time.c:300,
and sometimes host kernel hangs.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
11 years agokvm/ppc/booke: Hold srcu lock when calling gfn functions
Scott Wood [Fri, 7 Jun 2013 00:16:31 +0000 (19:16 -0500)]
kvm/ppc/booke: Hold srcu lock when calling gfn functions

KVM core expects arch code to acquire the srcu lock when calling
gfn_to_memslot and similar functions.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
11 years agokvm/ppc/booke64: Disable e6500 support
Scott Wood [Fri, 7 Jun 2013 00:16:30 +0000 (19:16 -0500)]
kvm/ppc/booke64: Disable e6500 support

The previous patch made 64-bit booke KVM build again, but Altivec
support is still not complete, and we can't prevent the guest from
turning on Altivec (which can corrupt host state until state
save/restore is implemented).  Disable e6500 on KVM until this is
fixed.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
11 years agokvm/ppc/booke64: Fix AltiVec interrupt numbers and build breakage
Mihai Caraman [Fri, 7 Jun 2013 00:16:29 +0000 (19:16 -0500)]
kvm/ppc/booke64: Fix AltiVec interrupt numbers and build breakage

Interrupt numbers defined for Book3E follows IVORs definition. Align
BOOKE_INTERRUPT_ALTIVEC_UNAVAIL and BOOKE_INTERRUPT_ALTIVEC_ASSIST to this
rule which also fixes the build breakage.
IVORs 32 and 33 are shared so reflect this in the interrupts naming.

This fixes a build break for 64-bit booke KVM.

Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
11 years agomips/kvm: Use KVM_REG_MIPS and proper size indicators for *_ONE_REG
David Daney [Mon, 10 Jun 2013 19:33:48 +0000 (12:33 -0700)]
mips/kvm: Use KVM_REG_MIPS and proper size indicators for *_ONE_REG

The API requires that the GET_ONE_REG and SET_ONE_REG ioctls have this
extra information encoded in the register identifiers.

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
11 years agokvm: Add definition of KVM_REG_MIPS
David Daney [Mon, 10 Jun 2013 19:33:47 +0000 (12:33 -0700)]
kvm: Add definition of KVM_REG_MIPS

We use 0x7000000000000000ULL as 0x6000000000000000ULL is reserved for
ARM64.

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
11 years agoKVM: add kvm_para_available to asm-generic/kvm_para.h
James Hogan [Wed, 22 May 2013 11:29:22 +0000 (12:29 +0100)]
KVM: add kvm_para_available to asm-generic/kvm_para.h

According to include/uapi/linux/kvm_para.h architectures should define
kvm_para_available, so add an implementation to asm-generic/kvm_para.h
which just returns false.

This fixes intel8x0.c build failure on mips with KVM enabled.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Gleb Natapov <gleb@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
11 years agoMerge tag 'mmc-fixes-for-3.10-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Wed, 5 Jun 2013 00:13:06 +0000 (09:13 +0900)]
Merge tag 'mmc-fixes-for-3.10-rc5' of git://git./linux/kernel/git/cjb/mmc

Pull MMC fixes from Chris Ball:
 - sdhci-acpi: Fix initial runtime PM status, add more ACPI IDs
 - atmel-mci, omap_hsmmc: DT handling fixes
 - esdhc-imx: Fix SDIO IRQs, fix multiblock reads (both h/w errata)

* tag 'mmc-fixes-for-3.10-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc:
  mmc: omap_hsmmc: Skip platform_get_resource_byname() for dt case
  mmc: omap_hsmmc: convert to dma_request_slave_channel_compat
  mmc: omap_hsmmc: Fix the DT pbias workaround for MMC controllers 2 to 5
  mmc: sdhci-pci: add more device ids
  mmc: sdhci-acpi: add more device ids
  mmc: sdhci-acpi: fix initial runtime pm status
  mmc: atmel-mci: convert to dma_request_slave_channel_compat()
  mmc: sdhci-esdhc-imx: fix multiblock reads on i.MX53
  mmc: sdhci-esdhc-imx: Fix SDIO interrupts

11 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Linus Torvalds [Wed, 5 Jun 2013 00:11:06 +0000 (09:11 +0900)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input

Pull input fixes from Dmitry Torokhov:
 "Just a 2 small driver fixups here"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: wacom - fix a typo for Cintiq 22HDT
  Input: synaptics - fix sync lost after resume on some laptops

11 years agoMerge branch 'fixes' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Wed, 5 Jun 2013 00:09:35 +0000 (09:09 +0900)]
Merge branch 'fixes' of git://git./virt/kvm/kvm

Pull kvm bugfixes from Gleb Natapov:
 "The bulk of the fixes is in MIPS KVM kernel<->userspace ABI.  MIPS KVM
  is new for 3.10 and some problems were found with current ABI.  It is
  better to fix them now and do not have a kernel with broken one"

* 'fixes' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: Fix race in apic->pending_events processing
  KVM: fix sil/dil/bpl/spl in the mod/rm fields
  KVM: Emulate multibyte NOP
  ARM: KVM: be more thorough when invalidating TLBs
  ARM: KVM: prevent NULL pointer dereferences with KVM VCPU ioctl
  mips/kvm: Use ENOIOCTLCMD to indicate unimplemented ioctls.
  mips/kvm: Fix ABI by moving manipulation of CP0 registers to KVM_{G,S}ET_ONE_REG
  mips/kvm: Use ARRAY_SIZE() instead of hardcoded constants in kvm_arch_vcpu_ioctl_{s,g}et_regs
  mips/kvm: Fix name of gpr field in struct kvm_regs.
  mips/kvm: Fix ABI for use of 64-bit registers.
  mips/kvm: Fix ABI for use of FPU.

11 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-fixes
Linus Torvalds [Wed, 5 Jun 2013 00:06:28 +0000 (09:06 +0900)]
Merge git://git./linux/kernel/git/steve/gfs2-3.0-fixes

Pull gfs2 fixes from Steven Whitehouse:
 "There are four patches this time.

  The first fixes a problem where the wrong descriptor type was being
  written into the log for journaled data blocks.

  The second fixes a race relating to the deallocation of allocator
  data.

  The third provides a fallback if kmalloc is unable to satisfy a
  request to allocate a directory hash table.

  The fourth fixes the iopen glock caching so that inodes are deleted in
  a more timely manner after rmdir/unlink"

* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-fixes:
  GFS2: Don't cache iopen glocks
  GFS2: Fall back to vmalloc if kmalloc fails for dir hash tables
  GFS2: Increase i_writecount during gfs2_setattr_size
  GFS2: Set log descriptor type for jdata blocks

11 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi...
Linus Torvalds [Wed, 5 Jun 2013 00:03:31 +0000 (09:03 +0900)]
Merge branch 'for-linus' of git://git./linux/kernel/git/mszeredi/fuse

Pull fuse fixes from Miklos Szeredi:
 "One patch fixes an Oops introduced in 3.9 with the readdirplus
  feature.  The rest are fixes for async-dio in 3.10"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
  fuse: fix alignment in short read optimization for async_dio
  fuse: return -EIOCBQUEUED from fuse_direct_IO() for all async requests
  fuse: fix readdirplus Oops in fuse_dentry_revalidate
  fuse: update inode size and invalidate attributes on fallocate
  fuse: truncate pagecache range on hole punch
  fuse: allocate for_background dio requests based on io->async state

11 years agoMerge branch 'next' of git://git.monstr.eu/linux-2.6-microblaze
Linus Torvalds [Wed, 5 Jun 2013 00:02:09 +0000 (09:02 +0900)]
Merge branch 'next' of git://git.monstr.eu/linux-2.6-microblaze

Pull microblaze fixes from Michal Simek:
 "One is fixing warning reported by sparse and the second warning was
  reported by Geert in his build regressions/improvements status update
  for -rc4."

* 'next' of git://git.monstr.eu/linux-2.6-microblaze:
  microblaze: Use static inline functions in cacheflush.h
  microblaze: Fix sparse warnings

11 years agoInput: wacom - fix a typo for Cintiq 22HDT
Ping Cheng [Thu, 23 May 2013 17:22:33 +0000 (10:22 -0700)]
Input: wacom - fix a typo for Cintiq 22HDT

And make the lines easier to read.

Signed-off-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
11 years agoInput: synaptics - fix sync lost after resume on some laptops
Eric Miao [Tue, 4 Jun 2013 16:30:55 +0000 (09:30 -0700)]
Input: synaptics - fix sync lost after resume on some laptops

In summary, the symptom is intermittent key events lost after resume
on some machines with synaptics touchpad (seems this is synaptics _only_),
and key events loss is due to serio port reconnect after psmouse sync lost.
Removing psmouse and inserting it back during the suspend/resume process
is able to work around the issue, so the difference between psmouse_connect()
and psmouse_reconnect() is the key to the root cause of this problem.

After comparing the two different paths, synaptics driver has its own
implementation of synaptics_reconnect(), and the missing psmouse_probe()
seems significant, the patch below added psmouse_probe() to the reconnect
process, and has been verified many times that the issue could not be reliably
reproduced.

There are two PS/2 commands in psmouse_probe():

  1. PSMOUSE_CMD_GETID
  2. PSMOUSE_CMD_RESET_DIS

Only the PSMOUSE_CMD_GETID seems to be significant. The
PSMOUSE_CMD_RESET_DIS is irrelevant to this issue after trying
several times.  So we have only implemented this patch to issue
the PSMOUSE_CMD_GETID so far.

Tested-by: Daniel Manrique <daniel.manrique@canonical.com>
Signed-off-by: James M Leddy <james.leddy@canonical.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
11 years agoMerge tag 'regulator-v3.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Mon, 3 Jun 2013 21:34:51 +0000 (06:34 +0900)]
Merge tag 'regulator-v3.10-rc4' of git://git./linux/kernel/git/broonie/regulator

Pull regulator fixes from Mark Brown:
 "A few small fixes for v3.10, documentation things in the core and a
  few driver bugs."

* tag 'regulator-v3.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: palmas: Fix "enable_reg" to point to the correct reg for SMPS10
  regulator: palmas: Fix incorrect condition
  regulator: core: Correct spelling mistake in comment
  regulator: dbx500: Make local symbol static
  regulator: Fix kernel-doc generation warnings.

11 years agoMerge tag 'jfs-3.10-rc5' of git://github.com/kleikamp/linux-shaggy
Linus Torvalds [Mon, 3 Jun 2013 21:33:44 +0000 (06:33 +0900)]
Merge tag 'jfs-3.10-rc5' of git://github.com/kleikamp/linux-shaggy

Pull jfs bugfixes from David Kleikamp:
 "A couple jfs bug fixes for 3.10-rc5"

* tag 'jfs-3.10-rc5' of git://github.com/kleikamp/linux-shaggy:
  fs/jfs: Add check if journaling to disk has been disabled in lbmRead()
  jfs: Several bugs in jfs_freeze() and jfs_unfreeze()

11 years agoGFS2: Don't cache iopen glocks
Bob Peterson [Wed, 29 May 2013 15:51:52 +0000 (11:51 -0400)]
GFS2: Don't cache iopen glocks

This patch makes GFS2 immediately reclaim/delete all iopen glocks
as soon as they're dequeued. This allows deleters to get an
EXclusive lock on iopen so files are deleted properly instead of
being set as unlinked.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
11 years agoGFS2: Fall back to vmalloc if kmalloc fails for dir hash tables
Bob Peterson [Thu, 30 May 2013 13:48:56 +0000 (09:48 -0400)]
GFS2: Fall back to vmalloc if kmalloc fails for dir hash tables

This version has one more correction: the vmalloc calls are replaced
by __vmalloc calls to preserve the GFP_NOFS flag.

When GFS2's directory management code allocates buffers for a
directory hash table, if it can't get the memory it needs, it
currently gives a bad return code. Rather than giving an error,
this patch allows it to use virtual memory rather than kernel
memory for the hash table. This should make it possible for
directories to function properly, even when kernel memory becomes
very fragmented.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
11 years agoGFS2: Increase i_writecount during gfs2_setattr_size
Bob Peterson [Tue, 28 May 2013 14:04:44 +0000 (10:04 -0400)]
GFS2: Increase i_writecount during gfs2_setattr_size

This patch calls get_write_access in a few functions. This
merely increases inode->i_writecount for the duration of the function.
That will ensure that any file closes won't delete the inode's
multi-block reservation while the function is running.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
11 years agoGFS2: Set log descriptor type for jdata blocks
Bob Peterson [Fri, 24 May 2013 19:02:49 +0000 (15:02 -0400)]
GFS2: Set log descriptor type for jdata blocks

This patch sets the log descriptor type according to whether the
journal commit is for (journaled) data or metadata. This was
recently broken when the functions to process data and metadata
log ops were combined.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
11 years agofuse: fix alignment in short read optimization for async_dio
Maxim Patlasov [Thu, 30 May 2013 12:41:34 +0000 (16:41 +0400)]
fuse: fix alignment in short read optimization for async_dio

The bug was introduced with async_dio feature: trying to optimize short reads,
we cut number-of-bytes-to-read to i_size boundary. Hence the following example:

truncate --size=300 /mnt/file
dd if=/mnt/file of=/dev/null iflag=direct

led to FUSE_READ request of 300 bytes size. This turned out to be problem
for userspace fuse implementations who rely on assumption that kernel fuse
does not change alignment of request from client FS.

The patch turns off the optimization if async_dio is disabled. And, if it's
enabled, the patch fixes adjustment of number-of-bytes-to-read to preserve
alignment.

Note, that we cannot throw out short read optimization entirely because
otherwise a direct read of a huge size issued on a tiny file would generate
a huge amount of fuse requests and most of them would be ACKed by userspace
with zero bytes read.

Signed-off-by: Maxim Patlasov <MPatlasov@parallels.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
11 years agofuse: return -EIOCBQUEUED from fuse_direct_IO() for all async requests
Brian Foster [Thu, 30 May 2013 19:35:50 +0000 (15:35 -0400)]
fuse: return -EIOCBQUEUED from fuse_direct_IO() for all async requests

If request submission fails for an async request (i.e.,
get_user_pages() returns -ERESTARTSYS), we currently skip the
-EIOCBQUEUED return and drop into wait_for_sync_kiocb() forever.

Avoid this by always returning -EIOCBQUEUED for async requests. If
an error occurs, the error is passed into fuse_aio_complete(),
returned via aio_complete() and thus propagated to userspace via
io_getevents().

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Maxim Patlasov <MPatlasov@parallels.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
11 years agofuse: fix readdirplus Oops in fuse_dentry_revalidate
Miklos Szeredi [Mon, 3 Jun 2013 12:40:22 +0000 (14:40 +0200)]
fuse: fix readdirplus Oops in fuse_dentry_revalidate

Fix bug introduced by commit 4582a4ab2a "FUSE: Adapt readdirplus to application
usage patterns".

We need to check for a positive dentry; negative dentries are not added by
readdirplus.  Secondly we need to advise the use of readdirplus on the *parent*,
otherwise the whole thing is useless.  Thirdly all this is only relevant if
"readdirplus_auto" mode is selected by the filesystem.

We advise the use of readdirplus only if the dentry was still valid.  If we had
to redo the lookup then there was no use in doing the -plus version.

Reported-by: Bernd Schubert <bernd.schubert@itwm.fraunhofer.de>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: Feng Shuo <steve.shuo.feng@gmail.com>
CC: stable@vger.kernel.org
11 years agomicroblaze: Use static inline functions in cacheflush.h
Michal Simek [Mon, 3 Jun 2013 09:30:04 +0000 (11:30 +0200)]
microblaze: Use static inline functions in cacheflush.h

Using static inline functions ensure proper type checking
which also remove compilation warning for no MMU

Compilation warning:
arch/microblaze/include/asm/cacheflush.h: warning: 'addr'
 may be used uninitialized in this function [-Wmaybe-uninitialized]

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
11 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux...
Linus Torvalds [Mon, 3 Jun 2013 09:09:42 +0000 (18:09 +0900)]
Merge branch 'for-linus' of git://git./linux/kernel/git/geert/linux-m68k

Pull m68k fix from Geert Uytterhoeven:
 "A boot lock-up on Mac, also destined for stable"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
  m68k/mac: Fix unexpected interrupt with CONFIG_EARLY_PRINTK

11 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Linus Torvalds [Mon, 3 Jun 2013 09:04:07 +0000 (18:04 +0900)]
Merge branch 'for-linus' of git://git./linux/kernel/git/s390/linux

Pull s390 fixes from Martin Schwidefsky:
 "Recent bug fixes, one of them touches a common code file.

  It adds two #ifndef/#endif pairs to asm-generic/io.h to be able to
  override xlate_dev_kmem_ptr and xlate_dev_mem_ptr."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/pgtable: Fix gmap notifier address
  s390/dasd: fix handling of gone paths
  s390/pgtable: Fix check for pgste/storage key handling
  arch: s390: appldata: using strncpy() and strnlen() instead of sprintf()
  s390/smp: lost IPIs on cpu hotplug
  kernel: Fix s390 absolute memory access for /dev/mem
  s390/dma: do not call debug_dma after free

11 years agoMerge branch 'for-3.10-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj...
Linus Torvalds [Mon, 3 Jun 2013 08:57:16 +0000 (17:57 +0900)]
Merge branch 'for-3.10-fixes' of git://git./linux/kernel/git/tj/cgroup

Pull cgroup fixes from Tejun Heo:

 - Fix for yet another xattr bug which may lead to NULL deref.

 - A subtle bug in for_each_descendant_pre().  This bug requires quite
   specific conditions to trigger and isn't too likely to actually
   happen in the wild, but maybe that just makes it that much more
   nastier.

 - A warning message added for silly cgroup re-mount (not -o remount,
   but unmount followed by mount) behavior.

* 'for-3.10-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cgroup: warn about mismatching options of a new mount of an existing hierarchy
  cgroup: fix a subtle bug in descendant pre-order walk
  cgroup: initialize xattr before calling d_instantiate()

11 years agoMerge branch 'for-3.10-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj...
Linus Torvalds [Mon, 3 Jun 2013 08:55:09 +0000 (17:55 +0900)]
Merge branch 'for-3.10-fixes' of git://git./linux/kernel/git/tj/libata

Pull libata changes from Tejun Heo:
 "Nothing too interesting.  PCI ID additions, some sata_rcar fixes and a
  fringe bug fix for DMADIR handling which shouldn't affect any device
  remotely modern."

* 'for-3.10-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
  sata_rcar: fix interrupt handling
  ahci: add an observed PCI ID for Marvell 88se9172 SATA controller
  sata_rcar: clear STOP bit in bmdma_start() method
  libata: make ata_exec_internal_sg honor DMADIR
  ata_piix: add PCI IDs for Intel BayTail
  libata: update "Maintained by:" tags

11 years agomicroblaze: Fix sparse warnings
Michal Simek [Thu, 30 May 2013 13:10:52 +0000 (15:10 +0200)]
microblaze: Fix sparse warnings

arch/microblaze/include/asm/uaccess.h:101:3:
 warning: cast removes address space of expression
arch/microblaze/include/asm/uaccess.h:107:2:
 warning: cast removes address space of expression

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
11 years agoKVM: Fix race in apic->pending_events processing
Gleb Natapov [Mon, 3 Jun 2013 08:30:02 +0000 (11:30 +0300)]
KVM: Fix race in apic->pending_events processing

apic->pending_events processing has a race that may cause INIT and
SIPI
processing to be reordered:

vpu0:                            vcpu1:
set INIT
                               test_and_clear_bit(KVM_APIC_INIT)
                                  process INIT
set INIT
set SIPI
                               test_and_clear_bit(KVM_APIC_SIPI)
                                  process SIPI

At the end INIT is left pending in pending_events. The following patch
fixes this by latching pending event before processing them.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
11 years agoKVM: fix sil/dil/bpl/spl in the mod/rm fields
Paolo Bonzini [Thu, 30 May 2013 14:35:55 +0000 (16:35 +0200)]
KVM: fix sil/dil/bpl/spl in the mod/rm fields

The x86-64 extended low-byte registers were fetched correctly from reg,
but not from mod/rm.

This fixes another bug in the boot of RHEL5.9 64-bit, but it is still
not enough.

Cc: <stable@vger.kernel.org> # 3.9
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
11 years agoKVM: Emulate multibyte NOP
Paolo Bonzini [Thu, 30 May 2013 11:22:39 +0000 (13:22 +0200)]
KVM: Emulate multibyte NOP

This is encountered when booting RHEL5.9 64-bit.  There is another bug
after this one that is not a simple emulation failure, but this one lets
the boot proceed a bit.

Cc: <stable@vger.kernel.org> # 3.9
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
11 years agoARM: KVM: be more thorough when invalidating TLBs
Marc Zyngier [Tue, 14 May 2013 11:11:34 +0000 (12:11 +0100)]
ARM: KVM: be more thorough when invalidating TLBs

The KVM/ARM MMU code doesn't take care of invalidating TLBs before
freeing a {pte,pmd} table. This could cause problems if the page
is reallocated and then speculated into by another CPU.

Reported-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
11 years agoARM: KVM: prevent NULL pointer dereferences with KVM VCPU ioctl
Andre Przywara [Wed, 8 May 2013 22:28:06 +0000 (00:28 +0200)]
ARM: KVM: prevent NULL pointer dereferences with KVM VCPU ioctl

Some ARM KVM VCPU ioctls require the vCPU to be properly initialized
with the KVM_ARM_VCPU_INIT ioctl before being used with further
requests. KVM_RUN checks whether this initialization has been
done, but other ioctls do not.
Namely KVM_GET_REG_LIST will dereference an array with index -1
without initialization and thus leads to a kernel oops.
Fix this by adding checks before executing the ioctl handlers.

 [ Removed superflous comment from static function - Christoffer ]

Changes from v1:
 * moved check into a static function with a meaningful name

Signed-off-by: Andre Przywara <andre.przywara@linaro.org>
Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
11 years agomips/kvm: Use ENOIOCTLCMD to indicate unimplemented ioctls.
David Daney [Thu, 23 May 2013 16:49:10 +0000 (09:49 -0700)]
mips/kvm: Use ENOIOCTLCMD to indicate unimplemented ioctls.

The Linux Way is to return -ENOIOCTLCMD to the vfs when an
unimplemented ioctl is requested.  Do this in kvm_mips instead of a
random mixture of -ENOTSUPP and -EINVAL.

Signed-off-by: David Daney <david.daney@cavium.com>
Acked-by: Sanjay Lal <sanjayl@kymasys.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
11 years agomips/kvm: Fix ABI by moving manipulation of CP0 registers to KVM_{G,S}ET_ONE_REG
David Daney [Thu, 23 May 2013 16:49:09 +0000 (09:49 -0700)]
mips/kvm: Fix ABI by moving manipulation of CP0 registers to KVM_{G,S}ET_ONE_REG

Because not all 256 CP0 registers are ever implemented, we need a
different method of manipulating them.  Use the
KVM_SET_ONE_REG/KVM_GET_ONE_REG mechanism.

Now unused code and definitions are removed.

Signed-off-by: David Daney <david.daney@cavium.com>
Acked-by: Sanjay Lal <sanjayl@kymasys.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
11 years agomips/kvm: Use ARRAY_SIZE() instead of hardcoded constants in kvm_arch_vcpu_ioctl_...
David Daney [Thu, 23 May 2013 16:49:08 +0000 (09:49 -0700)]
mips/kvm: Use ARRAY_SIZE() instead of hardcoded constants in kvm_arch_vcpu_ioctl_{s,g}et_regs

Also we cannot set special zero register, so force it to zero.

Signed-off-by: David Daney <david.daney@cavium.com>
Acked-by: Sanjay Lal <sanjayl@kymasys.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
11 years agomips/kvm: Fix name of gpr field in struct kvm_regs.
David Daney [Thu, 23 May 2013 16:49:07 +0000 (09:49 -0700)]
mips/kvm: Fix name of gpr field in struct kvm_regs.

Signed-off-by: David Daney <david.daney@cavium.com>
Acked-by: Sanjay Lal <sanjayl@kymasys.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
11 years agomips/kvm: Fix ABI for use of 64-bit registers.
David Daney [Thu, 23 May 2013 16:49:06 +0000 (09:49 -0700)]
mips/kvm: Fix ABI for use of 64-bit registers.

All registers are 64-bits wide, 32-bit guests use the least
significant portion of the register storage fields.

Signed-off-by: David Daney <david.daney@cavium.com>
Acked-by: Sanjay Lal <sanjayl@kymasys.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
11 years agomips/kvm: Fix ABI for use of FPU.
David Daney [Thu, 23 May 2013 16:49:05 +0000 (09:49 -0700)]
mips/kvm: Fix ABI for use of FPU.

Define a non-empty struct kvm_fpu.

Signed-off-by: David Daney <david.daney@cavium.com>
Acked-by: Sanjay Lal <sanjayl@kymasys.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
11 years agoLinux 3.10-rc4
Linus Torvalds [Sun, 2 Jun 2013 08:11:17 +0000 (17:11 +0900)]
Linux 3.10-rc4

11 years agosata_rcar: fix interrupt handling
Sergei Shtylyov [Fri, 31 May 2013 22:38:35 +0000 (02:38 +0400)]
sata_rcar: fix interrupt handling

The driver's interrupt handling code is too picky in deciding whether it should
handle an interrupt or not which causes completely unneeded spurious interrupts.
Thus make sata_rcar_{ata|serr}_interrupt() *void*; add ATA status register read
to sata_rcar_ata_interrupt() to clear an unexpected ATA interrupt -- it doesn't
get cleared by writing to the SATAINTSTAT register in the interrupt mode we use.

Also, in sata_rcar_ata_interrupt() we should check SATAINTSTAT register only for
enabled interrupts and we should clear  only those interrupts  that we have read
as active first time around, because else we have  a  race and risk clearing  an
interrupt that  can  occur between read  and write of the  SATAINTSTAT  register
and never registering it...

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
11 years agoMerge branch 'for-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/paris...
Linus Torvalds [Sat, 1 Jun 2013 21:24:54 +0000 (06:24 +0900)]
Merge branch 'for-3.10' of git://git./linux/kernel/git/deller/parisc-linux

Pull parisc fixes from Helge Deller:
 "This patcheset includes fixes for:

   - the PCI/LBA which brings back the stifb graphics framebuffer
     console
   - possible memory overflows in parisc kernel init code
   - parport support on older GSC machines
   - avoids that users by mistake enable PARPORT_PC_SUPERIO on parisc
   - MAINTAINERS file list updates for parisc."

* 'for-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: parport0: fix this legacy no-device port driver!
  parport_pc: disable PARPORT_PC_SUPERIO on parisc architecture
  parisc/PCI: lba: fix: convert to pci_create_root_bus() for correct root bus resources (v2)
  parisc/PCI: Set type for LBA bus_num resource
  MAINTAINERS: update parisc architecture file list
  parisc: kernel: using strlcpy() instead of strcpy()
  parisc: rename "CONFIG_PA7100" to "CONFIG_PA7000"
  parisc: fix kernel BUG at arch/parisc/include/asm/mmzone.h:50
  parisc: memory overflow, 'name' length is too short for using

11 years agoparisc: parport0: fix this legacy no-device port driver!
Helge Deller [Thu, 30 May 2013 21:06:39 +0000 (21:06 +0000)]
parisc: parport0: fix this legacy no-device port driver!

Fix the above kernel error from parport_announce_port() on 32bit GSC
machines (e.g. B160L). The parport driver requires now a pointer to the
device struct.

Signed-off-by: Helge Deller <deller@gmx.de>
11 years agoparport_pc: disable PARPORT_PC_SUPERIO on parisc architecture
Helge Deller [Thu, 30 May 2013 16:24:46 +0000 (16:24 +0000)]
parport_pc: disable PARPORT_PC_SUPERIO on parisc architecture

If enabled, CONFIG_PARPORT_PC_SUPERIO scans on PC-like hardware for
various super-io chips by accessing i/o ports in a range which will
crash any parisc hardware at once.

In addition, parisc has it's own incompatible superio chip
(CONFIG_SUPERIO), so if we disable PARPORT_PC_SUPERIO completely for
parisc we can avoid that people by accident enable the parport_pc
superio option too.

Signed-off-by: Helge Deller <deller@gmx.de>
11 years agoparisc/PCI: lba: fix: convert to pci_create_root_bus() for correct root bus resources...
Helge Deller [Fri, 31 May 2013 22:24:58 +0000 (22:24 +0000)]
parisc/PCI: lba: fix: convert to pci_create_root_bus() for correct root bus resources (v2)

commit dc7dce280a
Author: Bjorn Helgaas <bhelgaas@google.com>
Date:   Fri Oct 28 16:27:27 2011 -0600
   parisc/PCI: lba: convert to pci_create_root_bus() for correct root bus
                    resources

  Supply root bus resources to pci_create_root_bus() so they're correct
  immediately.  This fixes the problem of "early" and "header" quirks seeing
  incorrect root bus resources.

added tests for elmmio_space.start while it should use
elmmio_space.flags.  This for example led to incorrect resource
assignments and a non-working stifb framebuffer on most parisc machines.

LBA 10:1: PCI host bridge to bus 0000:01
pci_bus 0000:01: root bus resource [io  0x12000-0x13fff] (bus address [0x2000-0x3fff])
pci_bus 0000:01: root bus resource [mem 0xfffffffffa000000-0xfffffffffbffffff] (bus address [0xfa000000-0xfbffffff])
pci_bus 0000:01: root bus resource [mem 0xfffffffff4800000-0xfffffffff4ffffff] (bus address [0xf4800000-0xf4ffffff])
pci_bus 0000:01: root bus resource [??? 0x00000001 flags 0x0]

Signed-off-by: Helge Deller <deller@gmx.de>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
11 years agoparisc/PCI: Set type for LBA bus_num resource
Bjorn Helgaas [Thu, 30 May 2013 17:45:39 +0000 (11:45 -0600)]
parisc/PCI: Set type for LBA bus_num resource

The non-PAT resource probing code failed to set the type of the LBA bus_num
resource (30aa80da43 "parisc/PCI: register busn_res for root buses" did
the corresponding thing for the PAT case).

This causes incorrect resource assignments and a non-working stifb
framebuffer on most parisc machines.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Helge Deller <deller@gmx.de>
11 years agoMAINTAINERS: update parisc architecture file list
Helge Deller [Thu, 30 May 2013 13:48:07 +0000 (13:48 +0000)]
MAINTAINERS: update parisc architecture file list

Signed-off-by: Helge Deller <deller@gmx.de>
11 years agoparisc: kernel: using strlcpy() instead of strcpy()
Chen Gang [Thu, 30 May 2013 01:18:43 +0000 (01:18 +0000)]
parisc: kernel: using strlcpy() instead of strcpy()

'boot_args' is an input args, and 'boot_command_line' has a fix length.
So use strlcpy() instead of strcpy() to avoid memory overflow.

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Acked-by: Kyle McMartin <kyle@mcmartin.ca>
Signed-off-by: Helge Deller <deller@gmx.de>
11 years agoparisc: rename "CONFIG_PA7100" to "CONFIG_PA7000"
Paul Bolle [Wed, 29 May 2013 09:56:58 +0000 (09:56 +0000)]
parisc: rename "CONFIG_PA7100" to "CONFIG_PA7000"

There's a Makefile line setting cflags for CONFIG_PA7100. But that
Kconfig macro doesn't exist. There is a Kconfig symbol PA7000, which
covers both PA7000 and PA7100 processors. So let's use the corresponding
Kconfig macro.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Helge Deller <deller@gmx.de>
11 years agoparisc: fix kernel BUG at arch/parisc/include/asm/mmzone.h:50
Helge Deller [Tue, 28 May 2013 20:35:54 +0000 (20:35 +0000)]
parisc: fix kernel BUG at arch/parisc/include/asm/mmzone.h:50

With CONFIG_DISCONTIGMEM=y and multiple physical memory areas,
cat /proc/kpageflags triggers this kernel bug:

kernel BUG at arch/parisc/include/asm/mmzone.h:50!
CPU: 2 PID: 7848 Comm: cat Tainted: G      D W 3.10.0-rc3-64bit #44
 IAOQ[0]: kpageflags_read0x128/0x238
 IAOQ[1]: kpageflags_read0x12c/0x238
 RP(r2): proc_reg_read0xbc/0x130
Backtrace:
 [<00000000402ca2d4>] proc_reg_read0xbc/0x130
 [<0000000040235bcc>] vfs_read0xc4/0x1d0
 [<0000000040235f0c>] SyS_read0x94/0xf0
 [<0000000040105fc0>] syscall_exit0x0/0x14

kpageflags_read() walks through the whole memory, even if some memory
areas are physically not available. So, we should better not BUG on an
unavailable pfn in pfn_to_nid() but just return the expected value -1 or
0.

Signed-off-by: Helge Deller <deller@gmx.de>
11 years agoparisc: memory overflow, 'name' length is too short for using
Chen Gang [Mon, 27 May 2013 04:57:09 +0000 (04:57 +0000)]
parisc: memory overflow, 'name' length is too short for using

'path.bc[i]' can be asigned by PCI_SLOT() which can '> 10', so sizeof(6
* "%u:" + "%u" + '\0') may be 21.

Since 'name' length is 20, it may be memory overflow.

And 'path.bc[i]' is 'unsigned char' for printing, we can be sure the
max length of 'name' must be less than 28.

So simplify thinking, we can use 28 instead of 20 directly, and do not
think of whether 'patchc.bc[i]' can '> 100'.

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Helge Deller <deller@gmx.de>
11 years agoMerge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Linus Torvalds [Sat, 1 Jun 2013 11:13:16 +0000 (20:13 +0900)]
Merge branch 'merge' of git://git./linux/kernel/git/benh/powerpc

Pull powerpc fixes from Ben Herrenschmidt:
 "Here are a few more fixes for powerpc 3.10.  It's a bit more than I
  would have liked this late in the game but I suppose that's what
  happens with a brand new chip generation coming out.

  A few regression fixes, some last minute fixes for new P8 features
  such as transactional memory,...

  There's also one powerpc KVM patch that I requested that adds two
  missing functions to our in-kernel interrupt controller support which
  is itself a new 3.10 feature.  These are defined by the base
  hypervisor specification.  We didn't implement them originally because
  Linux doesn't use them but they are simple and I'm not comfortable
  having a half-implemented interface in 3.10 and having to deal with
  versionning etc...  later when something starts needing those calls.
  They cannot be emulated in qemu when using in-kernel interrupt
  controller (not enough shared state).

  Just added a last minute patch to fix a typo introducing a breakage in
  our cputable for Power7+ processors, sorry about that, but the
  regression it fixes just hurt me :-)"

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc/cputable: Fix typo on P7+ cputable entry
  powerpc/perf: Add missing SIER support
  powerpc/perf: Revert to original NO_SIPR logic
  powerpc/pci: Remove the unused variables in pci_process_bridge_OF_ranges
  powerpc/pci: Remove the stale comments of pci_process_bridge_OF_ranges
  powerpc/pseries: Always enable CONFIG_HOTPLUG_CPU on PSERIES SMP
  powerpc/kvm/book3s: Add support for H_IPOLL and H_XIRR_X in XICS emulation
  powerpc/32bit:Store temporary result in r0 instead of r8
  powerpc/mm: Always invalidate tlb on hpte invalidate and update
  powerpc/pseries: Improve stream generation comments in copypage/user
  powerpc/pseries: Kill all prefetch streams on context switch
  powerpc/cputable: Fix oprofile_cpu_type on power8
  powerpc/mpic: Fix irq distribution problem when MPIC_SINGLE_DEST_CPU
  powerpc/tm: Fix userspace stack corruption on signal delivery for active transactions
  powerpc/tm: Move TM abort cause codes to uapi
  powerpc/tm: Abort on emulation and alignment faults
  powerpc/tm: Update cause codes documentation
  powerpc/tm: Make room for hypervisor in abort cause codes

11 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
Linus Torvalds [Sat, 1 Jun 2013 11:05:20 +0000 (20:05 +0900)]
Merge git://git./linux/kernel/git/nab/target-pending

Pull scsi target fixes from Nicholas Bellinger:
 "The highlights include:

   - Re-instate sess->wait_list in target_wait_for_sess_cmds() for
     active I/O shutdown handling in fabrics using se_cmd->cmd_kref
   - Make ib_srpt call target_sess_cmd_list_set_waiting() during session
     shutdown
   - Fix FILEIO off-by-one READ_CAPACITY bug for !S_ISBLK export
   - Fix iscsi-target login error heap buffer overflow (Kees)
   - Fix iscsi-target active I/O shutdown handling regression in
     v3.10-rc1

  A big thanks to Kees Cook for fixing a long standing login error
  buffer overflow bug.

  All patches are CC'ed to stable with the exception of the v3.10-rc1
  specific regression + other minor target cleanup."

* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
  iscsi-target: Fix iscsit_free_cmd() se_cmd->cmd_kref shutdown handling
  target: Propigate up ->cmd_kref put return via transport_generic_free_cmd
  iscsi-target: fix heap buffer overflow on error
  target/file: Fix off-by-one READ_CAPACITY bug for !S_ISBLK export
  ib_srpt: Call target_sess_cmd_list_set_waiting during shutdown_session
  target: Re-instate sess_wait_list for target_wait_for_sess_cmds
  target: Remove unused wait_for_tasks bit in target_wait_for_sess_cmds

11 years agoMerge tag 'clk-fixes-for-linus' of git://git.linaro.org/people/mturquette/linux
Linus Torvalds [Sat, 1 Jun 2013 10:55:26 +0000 (19:55 +0900)]
Merge tag 'clk-fixes-for-linus' of git://git.linaro.org/people/mturquette/linux

Pull clock subsystem fixes from Mike Turquette:
 "A mix of small fixes affecting mostly ARM platforms as well as a
  discrete clock expander chip.  Most fixes are corrections to lousy
  clock data of one form or another."

* tag 'clk-fixes-for-linus' of git://git.linaro.org/people/mturquette/linux:
  clk: mxs: Include clk mxs header file
  clk: vt8500: Fix unbalanced spinlock in vt8500_dclk_set_rate()
  clk: si5351: Set initial clkout rate when defined in platform data.
  clk: si5351: Fix clkout rate computation.
  clk: samsung: Add CLK_IGNORE_UNUSED flag for the sysreg clocks
  clk: ux500: clk-sysctrl: handle clocks with no parents
  clk: ux500: Provide device enumeration number suffix for SMSC911x

11 years agoMerge tag 'fbdev-for-3.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/plagn...
Linus Torvalds [Sat, 1 Jun 2013 10:53:41 +0000 (19:53 +0900)]
Merge tag 'fbdev-for-3.10-rc4' of git://git./linux/kernel/git/plagnioj/linux-fbdev

Pull fbdev fixes from Jean-Christophe PLAGNIOL-VILLARD:
 "This contains some small fixes

   - Atmel LCDC: fix blank the backlight on remove
   - ps3fb: fix compile warning
   - OMAPDSS: Fix crash with DT boot"

* tag 'fbdev-for-3.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/plagnioj/linux-fbdev:
  atmel_lcdfb: blank the backlight on remove
  trivial: atmel_lcdfb: add missing error message
  OMAPDSS: Fix crash with DT boot
  fbdev/ps3fb: fix compile warning

11 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Linus Torvalds [Sat, 1 Jun 2013 10:51:52 +0000 (19:51 +0900)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs

Pull assorted fixes from Al Viro:
 "There'll be more - I'm trying to dig out from under the pile of mail
  (a couple of weeks of something flu-like ;-/) and there's several more
  things waiting for review; this is just the obvious stuff."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  zoran: racy refcount handling in vm_ops ->open()/->close()
  befs_readdir(): do not increment ->f_pos if filldir tells us to stop
  hpfs: deadlock and race in directory lseek()
  qnx6: qnx6_readdir() has a braino in pos calculation
  fix buffer leak after "scsi: saner replacements for ->proc_info()"
  vfs: Fix invalid ida_remove() call

11 years agoMerge tag 'nfs-for-3.10-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Linus Torvalds [Sat, 1 Jun 2013 10:48:59 +0000 (19:48 +0900)]
Merge tag 'nfs-for-3.10-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull two NFS client fixes from Trond Myklebust:
 - Fix a regression that broke NFS mounting using klibc and busybox
 - Stable fix to check access modes correctly on NFSv4 delegated open()

* tag 'nfs-for-3.10-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  NFS: Fix security flavor negotiation with legacy binary mounts
  NFSv4: Fix a thinko in nfs4_try_open_cached

11 years agopowerpc/cputable: Fix typo on P7+ cputable entry
Will Schmidt [Mon, 20 May 2013 05:04:18 +0000 (05:04 +0000)]
powerpc/cputable: Fix typo on P7+ cputable entry

Fix a typo in setting COMMON_USER2_POWER7 bits to .cpu_user_features2
cpu specs table.

Signed-off-by: Will Schmidt <will_schmidt@vnet.ibm.com>
Acked-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
11 years agopowerpc/perf: Add missing SIER support
Michael Ellerman [Wed, 15 May 2013 20:19:31 +0000 (20:19 +0000)]
powerpc/perf: Add missing SIER support

Commit 8f61aa3 "Add support for SIER" missed updates to siar_valid()
and perf_get_data_addr().

In both cases we need to check the SIER instead of mmcra.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
11 years agopowerpc/perf: Revert to original NO_SIPR logic
Michael Ellerman [Wed, 15 May 2013 20:19:30 +0000 (20:19 +0000)]
powerpc/perf: Revert to original NO_SIPR logic

This is a revert and then some of commit 860aad7 "Add regs_no_sipr()".
This workaround was only needed on early chip versions.

As before NO_SIPR becomes a static flag of the PMU struct.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
11 years agopowerpc/pci: Remove the unused variables in pci_process_bridge_OF_ranges
Kevin Hao [Thu, 16 May 2013 20:58:42 +0000 (20:58 +0000)]
powerpc/pci: Remove the unused variables in pci_process_bridge_OF_ranges

The codes which ever used these two variables have gone. Throw away
them too.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
11 years agopowerpc/pci: Remove the stale comments of pci_process_bridge_OF_ranges
Kevin Hao [Thu, 16 May 2013 20:58:41 +0000 (20:58 +0000)]
powerpc/pci: Remove the stale comments of pci_process_bridge_OF_ranges

These comments already don't apply to the current code. So just remove
them.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
11 years agopowerpc/pseries: Always enable CONFIG_HOTPLUG_CPU on PSERIES SMP
Srivatsa S. Bhat [Tue, 21 May 2013 09:32:48 +0000 (09:32 +0000)]
powerpc/pseries: Always enable CONFIG_HOTPLUG_CPU on PSERIES SMP

Adam Lackorzynski reported the following build failure on
!CONFIG_HOTPLUG_CPU configuration:

  CC      arch/powerpc/kernel/rtas.o
arch/powerpc/kernel/rtas.c: In function â€˜rtas_cpu_state_change_mask’:
arch/powerpc/kernel/rtas.c:843:4: error: implicit declaration of function â€˜cpu_down’ [-Werror=implicit-function-declaration]
cc1: all warnings being treated as errors
make[1]: *** [arch/powerpc/kernel/rtas.o] Error 1
make: *** [arch/powerpc/kernel] Error 2

The build fails because cpu_down() is defined only under CONFIG_HOTPLUG_CPU.

Looking further, the mobility code in pseries is one of the call-sites which
uses rtas_ibm_suspend_me(), which in turn calls rtas_cpu_state_change_mask().
And the mobility code is unconditionally compiled-in (it does not fall under
any Kconfig option). And commit 120496ac (powerpc: Bring all threads online
prior to migration/hibernation) which introduced this build regression is
critical for the proper functioning of the migration code. So it appears
that the only solution to this problem is to enable CONFIG_HOTPLUG_CPU if
SMP is enabled on PPC_PSERIES platforms. So make that change in the Kconfig.

Reported-by: Adam Lackorzynski <adam@os.inf.tu-dresden.de>
Cc: stable@vger.kernel.org
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
11 years agopowerpc/kvm/book3s: Add support for H_IPOLL and H_XIRR_X in XICS emulation
Paul Mackerras [Thu, 23 May 2013 15:42:21 +0000 (15:42 +0000)]
powerpc/kvm/book3s: Add support for H_IPOLL and H_XIRR_X in XICS emulation

This adds the remaining two hypercalls defined by PAPR for manipulating
the XICS interrupt controller, H_IPOLL and H_XIRR_X.  H_IPOLL returns
information about the priority and pending interrupts for a virtual
cpu, without changing any state.  H_XIRR_X is like H_XIRR in that it
reads and acknowledges the highest-priority pending interrupt, but it
also returns the timestamp (timebase register value) from when the
interrupt was first received by the hypervisor.  Currently we just
return the current time, since we don't do any software queueing of
virtual interrupts inside the XICS emulation code.

These hcalls are not currently used by Linux guests, but may be in
future.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Acked-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
11 years agopowerpc/32bit:Store temporary result in r0 instead of r8
Priyanka Jain [Fri, 31 May 2013 01:20:02 +0000 (01:20 +0000)]
powerpc/32bit:Store temporary result in r0 instead of r8

Commit a9c4e541ea9b22944da356f2a9258b4eddcc953b
"powerpc/kprobe: Complete kprobe and migrate exception frame"
introduced a regression:

While returning from exception handling in case of PREEMPT enabled,
_TIF_NEED_RESCHED bit is checked in TI_FLAGS (thread_info flag) of current
task. Only if this bit is set, it should continue with the process of
calling preempt_schedule_irq() to schedule highest priority task if
available.

Current code assumes that r8 contains TI_FLAGS and check this for
_TIF_NEED_RESCHED, but as r8 is modified in the code which executes before
this check, r8 no longer contains the expected TI_FLAGS information.

As a result check for comparison with _TIF_NEED_RESCHED was failing even if
NEED_RESCHED bit is set in the current thread_info flag. Due to this,
preempt_schedule_irq() and in turn scheduler was not getting called even if
highest priority task is ready for execution.

So, store temporary results in r0 instead of r8 to prevent r8 from getting
modified as subsequent code is dependent on its value.

Signed-off-by: Priyanka Jain <Priyanka.Jain@freescale.com>
CC: <stable@vger.kernel.org> [v3.7+]
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
11 years agopowerpc/mm: Always invalidate tlb on hpte invalidate and update
Aneesh Kumar K.V [Fri, 31 May 2013 01:03:24 +0000 (01:03 +0000)]
powerpc/mm: Always invalidate tlb on hpte invalidate and update

If a hash bucket gets full, we "evict" a more/less random entry from it.
When we do that we don't invalidate the TLB (hpte_remove) because we assume
the old translation is still technically "valid". This implies that when
we are invalidating or updating pte, even if HPTE entry is not valid
we should do a tlb invalidate.

This was a regression introduced by b1022fbd293564de91596b8775340cf41ad5214c

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
11 years agopowerpc/pseries: Improve stream generation comments in copypage/user
Michael Neuling [Wed, 29 May 2013 19:34:29 +0000 (19:34 +0000)]
powerpc/pseries: Improve stream generation comments in copypage/user

No code changes, just documenting what's happening a little better.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
11 years agopowerpc/pseries: Kill all prefetch streams on context switch
Michael Neuling [Wed, 29 May 2013 19:34:27 +0000 (19:34 +0000)]
powerpc/pseries: Kill all prefetch streams on context switch

On context switch, we should have no prefetch streams leak from one
userspace process to another.  This frees up prefetch resources for the
next process.

Based on patch from Milton Miller.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
11 years agopowerpc/cputable: Fix oprofile_cpu_type on power8
Nishanth Aravamudan [Tue, 28 May 2013 10:39:50 +0000 (10:39 +0000)]
powerpc/cputable: Fix oprofile_cpu_type on power8

Maynard informed me that neither the oprofile kernel module nor oprofile
userspace has been updated to support that "legacy" oprofile module
interface for power8, which is indicated by "ppc64/power8." This results
in no samples. The solution is to default to the "timer" type, instead.
The raw entry also should be updated, as "ppc64/ibm-compat-v1" indicates
to oprofile userspace to use "compatibility events" which are obsolete
in ISA 2.07.

Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
11 years agopowerpc/mpic: Fix irq distribution problem when MPIC_SINGLE_DEST_CPU
chenhui zhao [Mon, 27 May 2013 21:59:43 +0000 (21:59 +0000)]
powerpc/mpic: Fix irq distribution problem when MPIC_SINGLE_DEST_CPU

For the mpic with a flag MPIC_SINGLE_DEST_CPU, only one bit should be
set in interrupt destination registers.

The code is applicable to 64-bit platforms as well as 32-bit.

Signed-off-by: Zhao Chenhui <chenhui.zhao@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
11 years agopowerpc/tm: Fix userspace stack corruption on signal delivery for active transactions
Michael Neuling [Sun, 26 May 2013 18:09:41 +0000 (18:09 +0000)]
powerpc/tm: Fix userspace stack corruption on signal delivery for active transactions

When in an active transaction that takes a signal, we need to be careful with
the stack.  It's possible that the stack has moved back up after the tbegin.
The obvious case here is when the tbegin is called inside a function that
returns before a tend.  In this case, the stack is part of the checkpointed
transactional memory state.  If we write over this non transactionally or in
suspend, we are in trouble because if we get a tm abort, the program counter
and stack pointer will be back at the tbegin but our in memory stack won't be
valid anymore.

To avoid this, when taking a signal in an active transaction, we need to use
the stack pointer from the checkpointed state, rather than the speculated
state.  This ensures that the signal context (written tm suspended) will be
written below the stack required for the rollback.  The transaction is aborted
becuase of the treclaim, so any memory written between the tbegin and the
signal will be rolled back anyway.

For signals taken in non-TM or suspended mode, we use the
normal/non-checkpointed stack pointer.

Tested with 64 and 32 bit signals

Signed-off-by: Michael Neuling <mikey@neuling.org>
Cc: <stable@vger.kernel.org> # v3.9
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
11 years agopowerpc/tm: Move TM abort cause codes to uapi
Michael Neuling [Sun, 26 May 2013 18:30:56 +0000 (18:30 +0000)]
powerpc/tm: Move TM abort cause codes to uapi

These cause codes are usable by userspace, so let's export to uapi.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Cc: <stable@vger.kernel.org> # v3.9
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
11 years agopowerpc/tm: Abort on emulation and alignment faults
Michael Neuling [Sun, 26 May 2013 18:09:39 +0000 (18:09 +0000)]
powerpc/tm: Abort on emulation and alignment faults

If we are emulating an instruction inside an active user transaction that
touches memory, the kernel can't emulate it as it operates in transactional
suspend context.  We need to abort these transactions and send them back to
userspace for the hardware to rollback.

We can service these if the user transaction is in suspend mode, since the
kernel will operate in the same suspend context.

This adds a check to all alignment faults and to specific instruction
emulations (only string instructions for now).  If the user process is in an
active (non-suspended) transaction, we abort the transaction go back to
userspace allowing the HW to roll back the transaction and tell the user of the
failure.  This also adds new tm abort cause codes to report the reason of the
persistent error to the user.

Crappy test case here http://neuling.org/devel/junkcode/aligntm.c

Signed-off-by: Michael Neuling <mikey@neuling.org>
Cc: <stable@vger.kernel.org> # v3.9
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
11 years agopowerpc/tm: Update cause codes documentation
Michael Neuling [Sun, 26 May 2013 18:09:38 +0000 (18:09 +0000)]
powerpc/tm: Update cause codes documentation

Signed-off-by: Michael Neuling <mikey@neuling.org>
Cc: <stable@vger.kernel.org> # 3.9 only
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
11 years agopowerpc/tm: Make room for hypervisor in abort cause codes
Michael Neuling [Sun, 26 May 2013 18:09:37 +0000 (18:09 +0000)]
powerpc/tm: Make room for hypervisor in abort cause codes

PAPR carves out 0xff-0xe0 for hypervisor use of transactional memory software
abort cause codes.  Unfortunately we don't respect this currently.

Below fixes this to move our cause codes to below this region.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Cc: <stable@vger.kernel.org> # 3.9 only
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
11 years agoMerge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Linus Torvalds [Fri, 31 May 2013 21:59:14 +0000 (06:59 +0900)]
Merge branch 'for_linus' of git://git./linux/kernel/git/jack/linux-fs

Pull reiserfs fixes from Jan Kara:
 "Three reiserfs fixes.  They fix real problems spotted by users so I
  hope they are ok even at this stage."

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  reiserfs: fix deadlock with nfs racing on create/lookup
  reiserfs: fix problems with chowning setuid file w/ xattrs
  reiserfs: fix spurious multiple-fill in reiserfs_readdir_dentry

11 years agoMerge tag 'for-linus-v3.10-rc4-crc-xattr-fixes' of git://oss.sgi.com/xfs/xfs
Linus Torvalds [Fri, 31 May 2013 21:56:21 +0000 (06:56 +0900)]
Merge tag 'for-linus-v3.10-rc4-crc-xattr-fixes' of git://oss.sgi.com/xfs/xfs

Pull xfs extended attribute fixes for CRCs from Ben Myers:
 "Here are several fixes that are relevant on CRC enabled XFS
  filesystems.  They are followed by a rework of the remote attribute
  code so that each block of the attribute contains a header with a CRC.

  Previously there was a CRC header per extent in the remote attribute
  code, but this was untenable because it was not possible to know how
  many extents would be allocated for the attribute until after the
  allocation has completed, due to the fragmentation of free space.
  This became complicated because the size of the headers needs to be
  added to the length of the payload to get the overall length required
  for the allocation.  With a header per block, things are less
  complicated at the cost of a little space.

  I would have preferred to defer this and the rest of the CRC queue to
  3.11 to mitigate risk for existing non-crc users in 3.10.  Doing so
  would require setting a feature bit for the on-disk changes, and so I
  have been pressured into sending this pull request by Eric Sandeen and
  David Chinner from Red Hat.  I'll send another pull request or two
  with the rest of the CRC queue next week.

   - Remove assert on count of remote attribute CRC headers
   - Fix the number of blocks read in for remote attributes
   - Zero remote attribute tails properly
   - Fix mapping of remote attribute buffers to have correct length
   - initialize temp leaf properly in xfs_attr3_leaf_unbalance, and
     xfs_attr3_leaf_compact
   - Rework remote atttributes to have a header per block"

* tag 'for-linus-v3.10-rc4-crc-xattr-fixes' of git://oss.sgi.com/xfs/xfs:
  xfs: rework remote attr CRCs
  xfs: fully initialise temp leaf in xfs_attr3_leaf_compact
  xfs: fully initialise temp leaf in xfs_attr3_leaf_unbalance
  xfs: correctly map remote attr buffers during removal
  xfs: remote attribute tail zeroing does too much
  xfs: remote attribute read too short
  xfs: remote attribute allocation may be contiguous

11 years agoMerge tag 'for-linus-v3.10-rc4' of git://oss.sgi.com/xfs/xfs
Linus Torvalds [Fri, 31 May 2013 21:50:16 +0000 (06:50 +0900)]
Merge tag 'for-linus-v3.10-rc4' of git://oss.sgi.com/xfs/xfs

Pull xfs fixes from Ben Myers:
 - Fix nested transactions in xfs_qm_scall_setqlim
 - Clear suid/sgid bits when we truncate with size update
 - Fix recovery for split buffers
 - Fix block count on remote symlinks
 - Add fsgeom flag for v5 superblock support
 - Disable XFS_IOC_SWAPEXT for CRC enabled filesystems
 - Fix dirv3 freespace block corruption

* tag 'for-linus-v3.10-rc4' of git://oss.sgi.com/xfs/xfs:
  xfs: fix dir3 freespace block corruption
  xfs: disable swap extents ioctl on CRC enabled filesystems
  xfs: add fsgeom flag for v5 superblock support.
  xfs: fix incorrect remote symlink block count
  xfs: fix split buffer vector log recovery support
  xfs: kill suid/sgid through the truncate path.
  xfs: avoid nesting transactions in xfs_qm_scall_setqlim()

11 years agoMerge tag 'please-pull-aertracefix' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 31 May 2013 21:47:04 +0000 (06:47 +0900)]
Merge tag 'please-pull-aertracefix' of git://git./linux/kernel/git/ras/ras

Pull aer error logging fix from Tony Luck:
 "Can't call pci_get_domain_bus_and_slot() from interupt context"

* tag 'please-pull-aertracefix' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras:
  aerdrv: Move cper_print_aer() call out of interrupt context

11 years agoMerge tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas...
Linus Torvalds [Fri, 31 May 2013 21:45:10 +0000 (06:45 +0900)]
Merge tag 'arm64-stable' of git://git./linux/kernel/git/cmarinas/linux-aarch64

Pull arm64 fixes from Catalin Marinas:
 - Module compilation issues (symbol not exported).
 - Plug a hole where user space can bring the kernel down.

* tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
  arm64: don't kill the kernel on a bad esr from el0
  arm64: treat unhandled compat el0 traps as undef
  arm64: Do not report user faults for handled signals
  arm64: kernel: compiling issue, need 'EXPORT_SYMBOL(clear_page)'

11 years agoreiserfs: fix deadlock with nfs racing on create/lookup
Jeff Mahoney [Fri, 31 May 2013 19:51:17 +0000 (15:51 -0400)]
reiserfs: fix deadlock with nfs racing on create/lookup

Reiserfs is currently able to be deadlocked by having two NFS clients
where one has removed and recreated a file and another is accessing the
file with an open file handle.

If one client deletes and recreates a file with timing such that the
recreated file obtains the same [dirid, objectid] pair as the original
file while another client accesses the file via file handle, the create
and lookup can race and deadlock if the lookup manages to create the
in-memory inode first.

The create thread, in insert_inode_locked4, will hold the write lock
while waiting on the other inode to be unlocked. The lookup thread,
anywhere in the iget path, will release and reacquire the write lock while
it schedules. If it needs to reacquire the lock while the create thread
has it, it will never be able to make forward progress because it needs
to reacquire the lock before ultimately unlocking the inode.

This patch drops the write lock across the insert_inode_locked4 call so
that the ordering of inode_wait -> write lock is retained. Since this
would have been the case before the BKL push-down, this is safe.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Jan Kara <jack@suse.cz>
11 years agoreiserfs: fix problems with chowning setuid file w/ xattrs
Jeff Mahoney [Fri, 31 May 2013 19:54:17 +0000 (15:54 -0400)]
reiserfs: fix problems with chowning setuid file w/ xattrs

reiserfs_chown_xattrs() takes the iattr struct passed into ->setattr
and uses it to iterate over all the attrs associated with a file to change
ownership of xattrs (and transfer quota associated with the xattr files).

When the setuid bit is cleared during chown, ATTR_MODE and iattr->ia_mode
are passed to all the xattrs as well. This means that the xattr directory
will have S_IFREG added to its mode bits.

This has been prevented in practice by a missing IS_PRIVATE check
in reiserfs_acl_chmod, which caused a double-lock to occur while holding
the write lock. Since the file system was completely locked up, the
writeout of the corrupted mode never happened.

This patch temporarily clears everything but ATTR_UID|ATTR_GID for the
calls to reiserfs_setattr and adds the missing IS_PRIVATE check.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Jan Kara <jack@suse.cz>
11 years agoreiserfs: fix spurious multiple-fill in reiserfs_readdir_dentry
Jeff Mahoney [Fri, 31 May 2013 19:07:52 +0000 (15:07 -0400)]
reiserfs: fix spurious multiple-fill in reiserfs_readdir_dentry

After sleeping for filldir(), we check to see if the file system has
changed and research. The next_pos pointer is updated but its value
isn't pushed into the key used for the search itself. As a result,
the search returns the same item that the last cycle of the loop did
and filldir() is called multiple times with the same data.

The end result is that the buffer can contain the same name multiple
times. This can be returned to userspace or used internally in the
xattr code where it can manifest with the following warning:

jdm-20004 reiserfs_delete_xattrs: Couldn't delete all xattrs (-2)

reiserfs_for_each_xattr uses reiserfs_readdir_dentry to iterate over
the xattr names and ends up trying to unlink the same name twice. The
second attempt fails with -ENOENT and the error is returned. At some
point I'll need to add support into reiserfsck to remove the orphaned
directories left behind when this occurs.

The fix is to push the value into the key before researching.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Jan Kara <jack@suse.cz>
11 years agozoran: racy refcount handling in vm_ops ->open()/->close()
Al Viro [Thu, 23 May 2013 08:38:22 +0000 (04:38 -0400)]
zoran: racy refcount handling in vm_ops ->open()/->close()

worse, we lock ->resource_lock too late when we are destroying the
final clonal VMA; the check for lack of other mappings of the same
opened file can race with mmap().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoatmel_lcdfb: blank the backlight on remove
Richard Genoud [Fri, 31 May 2013 15:49:35 +0000 (15:49 +0000)]
atmel_lcdfb: blank the backlight on remove

When removing atmel_lcdfb module, the backlight is unregistered but not
blanked. (only for CONFIG_BACKLIGHT_ATMEL_LCDC case).
This can result in the screen going full white depending on how the PWM
is wired.

Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
11 years agotrivial: atmel_lcdfb: add missing error message
Richard Genoud [Fri, 31 May 2013 14:28:38 +0000 (14:28 +0000)]
trivial: atmel_lcdfb: add missing error message

When a too small framebuffer is given, the atmel_lcdfb_check_var
silently fails.
Adding an error message will save some head scratching.

Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
11 years agobefs_readdir(): do not increment ->f_pos if filldir tells us to stop
Al Viro [Wed, 22 May 2013 17:41:26 +0000 (13:41 -0400)]
befs_readdir(): do not increment ->f_pos if filldir tells us to stop

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agohpfs: deadlock and race in directory lseek()
Al Viro [Sat, 18 May 2013 06:38:52 +0000 (02:38 -0400)]
hpfs: deadlock and race in directory lseek()

For one thing, there's an ABBA deadlock on hpfs fs-wide lock and i_mutex
in hpfs_dir_lseek() - there's a lot of methods that grab the former with
the caller already holding the latter, so it must take i_mutex first.

For another, locking the damn thing, carefully validating the offset,
then dropping locks and assigning the offset is obviously racy.

Moreover, we _must_ do hpfs_add_pos(), or the machinery in dnode.c
won't modify the sucker on B-tree surgeries.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agoqnx6: qnx6_readdir() has a braino in pos calculation
Al Viro [Fri, 17 May 2013 19:21:56 +0000 (15:21 -0400)]
qnx6: qnx6_readdir() has a braino in pos calculation

We want to mask lower 5 bits out, not leave only those and clear the
rest...  As it is, we end up always starting to read from the beginning
of directory, no matter what the current position had been.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agofix buffer leak after "scsi: saner replacements for ->proc_info()"
Jan Beulich [Wed, 29 May 2013 12:26:53 +0000 (13:26 +0100)]
fix buffer leak after "scsi: saner replacements for ->proc_info()"

That patch failed to set proc_scsi_fops' .release method.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agovfs: Fix invalid ida_remove() call
Takashi Iwai [Fri, 10 May 2013 12:04:11 +0000 (14:04 +0200)]
vfs: Fix invalid ida_remove() call

When the group id of a shared mount is not allocated, the umount still
tries to call mnt_release_group_id(), which eventually hits a kernel
warning at ida_remove() spewing a message like:
  ida_remove called for id=0 which is not allocated.

This patch fixes the bug simply checking the group id in the caller.

Reported-by: Cristian Rodríguez <crrodriguez@opensuse.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
11 years agos390/pgtable: Fix gmap notifier address
Christian Borntraeger [Wed, 29 May 2013 11:08:39 +0000 (13:08 +0200)]
s390/pgtable: Fix gmap notifier address

The address of the gmap notifier was broken, resulting in
unhandled validity intercepts in KVM. Fix the rmap->vmaddr
to be on a segment boundary.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
11 years agos390/dasd: fix handling of gone paths
Stefan Weinhuber [Tue, 28 May 2013 13:26:06 +0000 (15:26 +0200)]
s390/dasd: fix handling of gone paths

When a path is gone and dasd_generic_path_event is called with a
PE_PATH_GONE event, we must assume that any I/O request on that
subchannel is still running. This is unlike the dasd_generic_notify
handler and the CIO_NO_PATH event, which implies that the subchannel
has been cleared.
If dasd_generic_path_event finds that the path has been the last
usable path, it must not call dasd_generic_last_path_gone (which would
reset the state of running requests), but just set the
DASD_STOPPED_DC_WAIT bit.

Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
11 years agoarm64: don't kill the kernel on a bad esr from el0
Mark Rutland [Tue, 28 May 2013 14:54:15 +0000 (15:54 +0100)]
arm64: don't kill the kernel on a bad esr from el0

Rather than completely killing the kernel if we receive an esr value we
can't deal with in the el0 handlers, send the process a SIGILL and log
the esr value in the hope that we can debug it. If we receive a bad esr
from el1, we'll die() as before.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: stable@vger.kernel.org
11 years agoarm64: treat unhandled compat el0 traps as undef
Mark Rutland [Fri, 24 May 2013 11:02:35 +0000 (12:02 +0100)]
arm64: treat unhandled compat el0 traps as undef

Currently, if a compat process reads or writes from/to a disabled
cp15/cp14 register, the trap is not handled by the el0_sync_compat
handler, and the kernel will head to bad_mode, where it will die(), and
oops(). For 64 bit processes, disabled system register accesses are
currently treated as unhandled instructions.

This patch modifies entry.S to treat these unhandled traps as undefined
instructions, sending a SIGILL to userspace. This gives processes a
chance to handle this and stop using inaccessible registers, and
prevents further issues in the kernel as a result of the die().

Reported-by: Johannes Jensen <Johannes.Jensen@arm.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
11 years agom68k/mac: Fix unexpected interrupt with CONFIG_EARLY_PRINTK
Finn Thain [Wed, 29 May 2013 02:37:17 +0000 (12:37 +1000)]
m68k/mac: Fix unexpected interrupt with CONFIG_EARLY_PRINTK

The present code does not wait for the SCC to finish resetting itself
before trying to initialise the device. The result is that the SCC
interrupt sources become enabled (if they weren't already). This leads to
an early boot crash (unexpected interrupt) given CONFIG_EARLY_PRINTK. Fix
this by adding a delay. A successful reset disables the interrupt sources.

Also, after the reset for channel A setup, the SCC then gets a second
reset for channel B setup which leaves channel A uninitialised again. Fix
this by performing the reset only once.

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Cc: stable@vger.kernel.org
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
11 years agoiscsi-target: Fix iscsit_free_cmd() se_cmd->cmd_kref shutdown handling
Nicholas Bellinger [Fri, 31 May 2013 07:49:41 +0000 (00:49 -0700)]
iscsi-target: Fix iscsit_free_cmd() se_cmd->cmd_kref shutdown handling

With the introduction of target_get_sess_cmd() referencing counting for
ISCSI_OP_SCSI_CMD processing with iser-target, iscsit_free_cmd() usage
in traditional iscsi-target driver code now needs to be aware of the
active I/O shutdown case when a remaining se_cmd->cmd_kref reference may
exist after transport_generic_free_cmd() completes, requiring a final
target_put_sess_cmd() to release iscsi_cmd descriptor memory.

This patch changes iscsit_free_cmd() to invoke __iscsit_free_cmd() before
transport_generic_free_cmd() -> target_put_sess_cmd(), and also avoids
aquiring the per-connection queue locks for typical fast-path calls
during normal ISTATE_REMOVE operation.

Also update iscsit_free_cmd() usage throughout iscsi-target to
use the new 'bool shutdown' parameter.

This patch fixes a regression bug introduced during v3.10-rc1 in
commit 3e1c81a95, that was causing the following WARNING to appear:

[  257.235153] ------------[ cut here]------------
[  257.240314] WARNING: at kernel/softirq.c:160 local_bh_enable_ip+0x3c/0x86()
[  257.248089] Modules linked in: vhost_scsi ib_srpt ib_cm ib_sa ib_mad ib_core tcm_qla2xxx tcm_loop
tcm_fc libfc iscsi_target_mod target_core_pscsi target_core_file
target_core_iblock target_core_mod configfs ipv6 iscsi_tcp libiscsi_tcp
libiscsi scsi_transport_iscsi loop acpi_cpufreq freq_table mperf
kvm_intel kvm crc32c_intel button ehci_pci pcspkr joydev i2c_i801
microcode ext3 jbd raid10 raid456 async_pq async_xor xor async_memcpy
async_raid6_recov raid6_pq async_tx raid1 raid0 linear igb hwmon
i2c_algo_bit i2c_core ptp ata_piix libata qla2xxx uhci_hcd ehci_hcd
mlx4_core scsi_transport_fc scsi_tgt pps_core
[  257.308748] CPU: 1 PID: 3295 Comm: iscsi_ttx Not tainted 3.10.0-rc2+ #103
[  257.316329] Hardware name: Intel Corporation S5520HC/S5520HC, BIOS S5500.86B.01.00.0057.031020111721 03/10/2011
[  257.327597]  ffffffff814c24b7 ffff880458331b58 ffffffff8138eef2 ffff880458331b98
[  257.335892]  ffffffff8102c052 ffff880400000008 0000000000000000 ffff88085bdf0000
[  257.344191]  ffff88085bdf00d8 ffff88085bdf00e0 ffff88085bdf00f8 ffff880458331ba8
[  257.352488] Call Trace:
[  257.355223]  [<ffffffff8138eef2>] dump_stack+0x19/0x1f
[  257.360963]  [<ffffffff8102c052>] warn_slowpath_common+0x62/0x7b
[  257.367669]  [<ffffffff8102c080>] warn_slowpath_null+0x15/0x17
[  257.374181]  [<ffffffff81032345>] local_bh_enable_ip+0x3c/0x86
[  257.380697]  [<ffffffff813917fd>] _raw_spin_unlock_bh+0x10/0x12
[  257.387311]  [<ffffffffa029069c>] iscsit_free_r2ts_from_list+0x5e/0x67 [iscsi_target_mod]
[  257.396438]  [<ffffffffa02906c5>] iscsit_release_cmd+0x20/0x223 [iscsi_target_mod]
[  257.404893]  [<ffffffffa02977a4>] lio_release_cmd+0x3a/0x3e [iscsi_target_mod]
[  257.412964]  [<ffffffffa01d59a1>] target_release_cmd_kref+0x7a/0x7c [target_core_mod]
[  257.421712]  [<ffffffffa01d69bc>] target_put_sess_cmd+0x5f/0x7f [target_core_mod]
[  257.430071]  [<ffffffffa01d6d6d>] transport_release_cmd+0x59/0x6f [target_core_mod]
[  257.438625]  [<ffffffffa01d6eb4>] transport_put_cmd+0x131/0x140 [target_core_mod]
[  257.446985]  [<ffffffffa01d6192>] ? transport_wait_for_tasks+0xfa/0x1d5 [target_core_mod]
[  257.456121]  [<ffffffffa01d6f11>] transport_generic_free_cmd+0x4e/0x52 [target_core_mod]
[  257.465159]  [<ffffffff81050537>] ? __migrate_task+0x110/0x110
[  257.471674]  [<ffffffffa02904ba>] iscsit_free_cmd+0x46/0x55 [iscsi_target_mod]
[  257.479741]  [<ffffffffa0291edb>] iscsit_immediate_queue+0x301/0x353 [iscsi_target_mod]
[  257.488683]  [<ffffffffa0292f7e>] iscsi_target_tx_thread+0x1c6/0x2a8 [iscsi_target_mod]
[  257.497623]  [<ffffffff81047486>] ? wake_up_bit+0x25/0x25
[  257.503652]  [<ffffffffa0292db8>] ? iscsit_ack_from_expstatsn+0xd5/0xd5 [iscsi_target_mod]
[  257.512882]  [<ffffffff81046f89>] kthread+0xb0/0xb8
[  257.518329]  [<ffffffff81046ed9>] ? kthread_freezable_should_stop+0x60/0x60
[  257.526105]  [<ffffffff81396fec>] ret_from_fork+0x7c/0xb0
[  257.532133]  [<ffffffff81046ed9>] ? kthread_freezable_should_stop+0x60/0x60
[  257.539906] ---[ end trace 5520397d0f2e0800 ]---

Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
11 years agotarget: Propigate up ->cmd_kref put return via transport_generic_free_cmd
Nicholas Bellinger [Fri, 31 May 2013 07:46:11 +0000 (00:46 -0700)]
target: Propigate up ->cmd_kref put return via transport_generic_free_cmd

Go ahead and propigate up the ->cmd_kref put return value from
target_put_sess_cmd() -> transport_release_cmd() -> transport_put_cmd()
-> transport_generic_free_cmd().

This is useful for certain fabrics when determining the active I/O
shutdown case with SCF_ACK_KREF where a final target_put_sess_cmd()
is still required by the caller.

Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>