Laurent Pinchart [Sun, 15 May 2016 21:15:47 +0000 (18:15 -0300)]
[media] v4l: vsp1: Fix typo in register field names
The VI6_RPF_ALPH_SEL ALPHA0 and ALPHA1 fields are inverted, swap them.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Laurent Pinchart [Sat, 23 Apr 2016 23:11:59 +0000 (20:11 -0300)]
[media] v4l: vsp1: Remove deprecated DRM API
The DRM driver has switched to the new API, remove the deprecated macros
and inline wrapper.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Laurent Pinchart [Thu, 24 Mar 2016 08:15:59 +0000 (05:15 -0300)]
[media] drm: rcar-du: Add Z-order support for VSP planes
Make the Z-order of VSP planes configurable through the zpos property,
exactly as for the native DU planes.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Laurent Pinchart [Thu, 24 Mar 2016 08:15:59 +0000 (05:15 -0300)]
[media] drm: rcar-du: Add alpha support for VSP planes
Make the global alpha multiplier of VSP planes configurable through the
alpha property, exactly as for the native DU planes.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Laurent Pinchart [Sat, 23 Apr 2016 22:08:59 +0000 (19:08 -0300)]
[media] v4l: vsp1: Group DRM RPF parameters in a structure
The vsp1_du_atomic_update_ext() function takes 7 RPF configuration
parameters, and more will likely be added later. This makes the code
difficult to read and error-prone as multiple parameters have the same
type.
Make the API safer and easier to extend in the future by grouping all
parameters in a structure. Use macro magic to ease the transition to the
new function by allowing the old and new functions to be called using
the same name. The macros and static inline wrapper will be removed as
soon as the caller is updated.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Laurent Pinchart [Sun, 10 Apr 2016 05:59:04 +0000 (02:59 -0300)]
[media] v4l: vsp1: Move frame sequence number from video node to pipeline
The frame sequence number is global to the pipeline, there's no need to
store copies in each video node.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Laurent Pinchart [Thu, 3 Mar 2016 23:17:49 +0000 (20:17 -0300)]
[media] v4l: vsp1: Make vsp1_entity_get_pad_compose() more generic
Turn the helper into a function that can retrieve crop and compose
selection rectangles.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Laurent Pinchart [Thu, 3 Mar 2016 23:06:22 +0000 (20:06 -0300)]
[media] v4l: vsp1: Replace container_of() with dedicated macro
Add a macro to cast from a struct media_entity to a struct vsp1_entity
to replace the manual implementations.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Laurent Pinchart [Wed, 24 Feb 2016 22:10:04 +0000 (19:10 -0300)]
[media] v4l: vsp1: Add output node value to routing table
The output node value indicates the value to be used in a sampling point
register to use the node as the source of histogram data.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Laurent Pinchart [Fri, 12 Feb 2016 00:49:14 +0000 (22:49 -0200)]
[media] v4l: vsp1: Add FCP support
On some platforms the VSP performs memory accesses through an FCP. When
that's the case get a reference to the FCP from the VSP DT node and
enable/disable it at runtime as needed.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Laurent Pinchart [Tue, 16 Feb 2016 13:49:39 +0000 (11:49 -0200)]
[media] v4l: vsp1: Don't handle clocks manually
The power domain performs functional clock handling when using runtime
PM, there's no need to enable and disable the clock manually.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Laurent Pinchart [Tue, 16 Feb 2016 13:49:39 +0000 (11:49 -0200)]
[media] v4l: vsp1: Implement runtime PM support
Replace the manual refcount and clock management code by runtime PM.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Laurent Pinchart [Fri, 12 Feb 2016 00:29:58 +0000 (22:29 -0200)]
[media] v4l: Add Renesas R-Car FCP driver
The FCP is a companion module of video processing modules in the
Renesas R-Car Gen3 SoCs. It provides data compression and decompression,
data caching, and conversion of AXI transactions in order to reduce the
memory bandwidth.
The driver is not meant to be used standalone but provides an API to the
video processing modules to control the FCP.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Laurent Pinchart [Sat, 23 Apr 2016 23:37:44 +0000 (20:37 -0300)]
[media] dt-bindings: Add Renesas R-Car FCP DT bindings
The FCP is a companion module of video processing modules in the Renesas
R-Car Gen3 SoCs. It provides data compression and decompression, data
caching, and conversion of AXI transactions in order to reduce the
memory bandwidth.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Mauro Carvalho Chehab [Thu, 16 Jun 2016 11:04:40 +0000 (08:04 -0300)]
[media] media-devnode.h: Fix documentation
Two parameters were documented with a wrong name, and a struct
device pointer description was missing.
That caused the following warnings, when building documentation:
include/media/media-devnode.h:102: warning: No description found for parameter 'media_dev'
include/media/media-devnode.h:126: warning: No description found for parameter 'mdev'
include/media/media-devnode.h:126: warning: Excess function parameter 'media_dev' description in 'media_devnode_register'
Rename the description, to match the function parameter and fix
Documentation.
No funcional changes.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Mauro Carvalho Chehab [Thu, 16 Jun 2016 10:44:42 +0000 (07:44 -0300)]
[media] rcar-vin: get rid of an unused var
drivers/media/platform/rcar-vin/rcar-core.c: In function 'rvin_graph_notify_complete':
drivers/media/platform/rcar-vin/rcar-core.c:65:22: warning: variable 'sd' set but not used [-Wunused-but-set-variable]
struct v4l2_subdev *sd;
^
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Niklas Söderlund [Tue, 26 Apr 2016 13:22:19 +0000 (10:22 -0300)]
[media] rcar-vin: add Renesas R-Car VIN driver
A V4L2 driver for Renesas R-Car VIN driver that do not depend on
soc_camera. The driver is heavily based on its predecessor and aims to
replace it.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Sakari Ailus [Sun, 3 Apr 2016 19:31:03 +0000 (16:31 -0300)]
[media] videobuf2-v4l2: Verify planes array in buffer dequeueing
When a buffer is being dequeued using VIDIOC_DQBUF IOCTL, the exact buffer
which will be dequeued is not known until the buffer has been removed from
the queue. The number of planes is specific to a buffer, not to the queue.
This does lead to the situation where multi-plane buffers may be requested
and queued with n planes, but VIDIOC_DQBUF IOCTL may be passed an argument
struct with fewer planes.
__fill_v4l2_buffer() however uses the number of planes from the dequeued
videobuf2 buffer, overwriting kernel memory (the m.planes array allocated
in video_usercopy() in v4l2-ioctl.c) if the user provided fewer
planes than the dequeued buffer had. Oops!
Fixes:
b0e0e1f83de3 ("[media] media: videobuf2: Prepare to divide videobuf2")
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: stable@vger.kernel.org # for v4.4 and later
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Sakari Ailus [Wed, 11 May 2016 21:44:32 +0000 (18:44 -0300)]
[media] vb2: core: Skip planes array verification if pb is NULL
An earlier patch fixing an input validation issue introduced another
issue: vb2_core_dqbuf() is called with pb argument value NULL in some
cases, causing a NULL pointer dereference. Fix this by skipping the
verification as there's nothing to verify.
Fixes:
e7e0c3e26587 ("[media] videobuf2-core: Check user space planes array in dqbuf")
Signed-off-by: David R <david@unsolicited.net>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: stable@vger.kernel.org # for v4.4 and later
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Shuah Khan [Fri, 10 Jun 2016 17:37:23 +0000 (14:37 -0300)]
[media] media: fix media devnode ioctl/syscall and unregister race
Media devnode open/ioctl could be in progress when media device unregister
is initiated. System calls and ioctls check media device registered status
at the beginning, however, there is a window where unregister could be in
progress without changing the media devnode status to unregistered.
process 1 process 2
fd = open(/dev/media0)
media_devnode_is_registered()
(returns true here)
media_device_unregister()
(unregister is in progress
and devnode isn't
unregistered yet)
...
ioctl(fd, ...)
__media_ioctl()
media_devnode_is_registered()
(returns true here)
...
media_devnode_unregister()
...
(driver releases the media device
memory)
media_device_ioctl()
(By this point
devnode->media_dev does not
point to allocated memory.
use-after free in in mutex_lock_nested)
BUG: KASAN: use-after-free in mutex_lock_nested+0x79c/0x800 at addr
ffff8801ebe914f0
Fix it by clearing register bit when unregister starts to avoid the race.
process 1 process 2
fd = open(/dev/media0)
media_devnode_is_registered()
(could return true here)
media_device_unregister()
(clear the register bit,
then start unregister.)
...
ioctl(fd, ...)
__media_ioctl()
media_devnode_is_registered()
(return false here, ioctl
returns I/O error, and
will not access media
device memory)
...
media_devnode_unregister()
...
(driver releases the media device
memory)
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Suggested-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reported-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Tested-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Shuah Khan [Wed, 4 May 2016 19:48:28 +0000 (16:48 -0300)]
[media] media: fix use-after-free in cdev_put() when app exits after driver unbind
When driver unbinds while media_ioctl is in progress, cdev_put() fails with
when app exits after driver unbinds.
Add devnode struct device kobj as the cdev parent kobject. cdev_add() gets
a reference to it and releases it in cdev_del() ensuring that the devnode
is not deallocated as long as the application has the device file open.
media_devnode_register() initializes the struct device kobj before calling
cdev_add(). media_devnode_unregister() does cdev_del() and then deletes the
device. devnode is released when the last reference to the struct device is
gone.
This problem is found on uvcvideo, em28xx, and au0828 drivers and fix has
been tested on all three.
kernel: [ 193.599736] BUG: KASAN: use-after-free in cdev_put+0x4e/0x50
kernel: [ 193.599745] Read of size 8 by task media_device_te/1851
kernel: [ 193.599792] INFO: Allocated in __media_device_register+0x54
kernel: [ 193.599951] INFO: Freed in media_devnode_release+0xa4/0xc0
kernel: [ 193.601083] Call Trace:
kernel: [ 193.601093] [<
ffffffff81aecac3>] dump_stack+0x67/0x94
kernel: [ 193.601102] [<
ffffffff815359b2>] print_trailer+0x112/0x1a0
kernel: [ 193.601111] [<
ffffffff8153b5e4>] object_err+0x34/0x40
kernel: [ 193.601119] [<
ffffffff8153d9d4>] kasan_report_error+0x224/0x530
kernel: [ 193.601128] [<
ffffffff814a2c3d>] ? kzfree+0x2d/0x40
kernel: [ 193.601137] [<
ffffffff81539d72>] ? kfree+0x1d2/0x1f0
kernel: [ 193.601154] [<
ffffffff8157ca7e>] ? cdev_put+0x4e/0x50
kernel: [ 193.601162] [<
ffffffff8157ca7e>] cdev_put+0x4e/0x50
kernel: [ 193.601170] [<
ffffffff815767eb>] __fput+0x52b/0x6c0
kernel: [ 193.601179] [<
ffffffff8117743a>] ? switch_task_namespaces+0x2a
kernel: [ 193.601188] [<
ffffffff815769ee>] ____fput+0xe/0x10
kernel: [ 193.601196] [<
ffffffff81170023>] task_work_run+0x133/0x1f0
kernel: [ 193.601204] [<
ffffffff8117746e>] ? switch_task_namespaces+0x5e
kernel: [ 193.601213] [<
ffffffff8111b50c>] do_exit+0x72c/0x2c20
kernel: [ 193.601224] [<
ffffffff8111ade0>] ? release_task+0x1250/0x1250
-
-
-
kernel: [ 193.601360] [<
ffffffff81003587>] ? exit_to_usermode_loop+0xe7
kernel: [ 193.601368] [<
ffffffff810035c0>] exit_to_usermode_loop+0x120
kernel: [ 193.601376] [<
ffffffff810061da>] syscall_return_slowpath+0x16a
kernel: [ 193.601386] [<
ffffffff82848b33>] entry_SYSCALL_64_fastpath+0xa6
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Tested-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Mauro Carvalho Chehab [Wed, 27 Apr 2016 22:28:26 +0000 (19:28 -0300)]
[media] media-device: dynamically allocate struct media_devnode
struct media_devnode is currently embedded at struct media_device.
While this works fine during normal usage, it leads to a race
condition during devnode unregister. the problem is that drivers
assume that, after calling media_device_unregister(), the struct
that contains media_device can be freed. This is not true, as it
can't be freed until userspace closes all opened /dev/media devnodes.
In other words, if the media devnode is still open, and media_device
gets freed, any call to an ioctl will make the core to try to access
struct media_device, with will cause an use-after-free and even GPF.
Fix this by dynamically allocating the struct media_devnode and only
freeing it when it is safe.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Mauro Carvalho Chehab [Wed, 23 Mar 2016 14:22:57 +0000 (11:22 -0300)]
[media] media-devnode: fix namespace mess
Along all media controller code, "mdev" is used to represent
a pointer to struct media_device, and "devnode" for a pointer
to struct media_devnode.
However, inside media-devnode.[ch], "mdev" is used to represent
a pointer to struct media_devnode.
This is very confusing and may lead to development errors.
So, let's change all occurrences at media-devnode.[ch] to
also use "devnode" for such pointers.
This patch doesn't make any functional changes.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Mauro Carvalho Chehab [Tue, 14 Jun 2016 17:48:50 +0000 (14:48 -0300)]
Update my main e-mails at the Kernel tree
For the third time in three years, I'm changing my e-mail at
Samsung. That's bad, as it may stop communications with me for
a while. So, this time, I'll also the mchehab@kernel.org e-mail,
as it remains stable since ever.
Cc: stable@vger.kernel.org
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Colin Ian King [Tue, 10 May 2016 05:40:22 +0000 (02:40 -0300)]
[media] m88rs2000: initialize status to zero
status is not initialized so it can contain garbage. The
check for status containing the FE_HAS_LOCK bit may randomly pass
or fail if the read of register 0x8c fails to set status after 25
read attempts. Fix this by initializing status to 0.
Issue found with CoverityScan, CID#986738
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Dan Carpenter [Mon, 9 May 2016 08:22:55 +0000 (05:22 -0300)]
[media] em28xx-i2c: rt_mutex_trylock() returns zero on failure
The code is checking for negative returns but it should be checking for
zero.
Fixes:
aab3125c43d8 ('[media] em28xx: add support for registering multiple i2c buses')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Zhaoxiu Zeng [Wed, 27 Apr 2016 07:07:08 +0000 (04:07 -0300)]
[media] mt2063: use lib gcd
This patch removes the local MT2063_gcd function, uses lib gcd instead
Signed-off-by: Zhaoxiu Zeng <zhaoxiu.zeng@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Martin Blumenstingl [Tue, 7 Jun 2016 21:31:47 +0000 (18:31 -0300)]
[media] rtl2832: add support for slave ts pid filter
The rtl2832 demod has 2 sets of PID filters. This patch enables
the filter support when using a slave demod.
Signed-off-by: Benjamin Larsson <benjamin@southpole.se>
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Antti Palosaari [Wed, 1 Jun 2016 11:25:05 +0000 (08:25 -0300)]
[media] af9035: fix logging
Remove __func__ and KBUILD_MODNAME from logging formatters and pass
USB interface device instead, so logging can be done correctly.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Alessandro Radicati [Thu, 12 May 2016 10:47:12 +0000 (07:47 -0300)]
[media] af9035: fix for MXL5007T devices with I2C read issues
The MXL5007T tuner will lock-up on some devices after an I2C read
transaction. This patch works around this issue by inhibiting such
operations and emulating a 0x00 response. The workaround is only
applied to USB devices known to exhibit this flaw.
Signed-off-by: Alessandro Radicati <alessandro@radicati.net>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Alessandro Radicati [Tue, 5 Apr 2016 22:23:43 +0000 (19:23 -0300)]
[media] af9035: I2C combined write + read transaction fix
This patch will modify the af9035 driver to use the register address
fields of the I2C read command for the combined write/read transaction
case. Without this change, the firmware issues just a I2C read
transaction without the preceding write transaction to select the
register.
Signed-off-by: Alessandro Radicati <alessandro@radicati.net>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Marek Szyprowski [Wed, 8 Jun 2016 06:51:53 +0000 (03:51 -0300)]
[media] of: reserved_mem: restore old behavior when no region is defined
Change return value back to -ENODEV when no region is defined for given
device. This restores old behavior of this function, as some drivers rely
on such error code.
Fixes:
59ce4039727ef40 ("of: reserved_mem: add support for using more than
one region for given device")
Reported-by: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Reviewed-by: Liviu Dudau <Liviu.Dudau@arm.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Sumit Semwal <sumit.semwal@linaro.org>
Max Kellermann [Mon, 21 Mar 2016 13:30:17 +0000 (10:30 -0300)]
[media] drivers/media/dvb-core/en50221: move code to dvb_ca_private_free()
Prepare for postponing the call until all file handles have been
closed.
[mchehab@osg.samsung.com: make checkpatch happy]
Signed-off-by: Max Kellermann <max@duempel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Olli Salonen [Wed, 16 Mar 2016 11:04:51 +0000 (08:04 -0300)]
[media] ds3000: return error if invalid symbol rate is set
Return -EINVAL if ds3000_set_frontend is called with invalid parameters.
v1 of the patch series got incorrect subject lines.
Signed-off-by: Olli Salonen <olli.salonen@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Fengguang Wu [Tue, 7 Jun 2016 15:26:01 +0000 (12:26 -0300)]
[media] fix semicolon.cocci warnings
drivers/media/dvb-frontends/helene.c:750:2-3: Unneeded semicolon
Remove unneeded semicolon.
Generated by: scripts/coccinelle/misc/semicolon.cocci
CC: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Martin Blumenstingl [Sun, 22 May 2016 16:12:07 +0000 (13:12 -0300)]
[media] rtl28xxu: sort the config symbols which are auto-selected
No functional changes.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Martin Blumenstingl [Sun, 22 May 2016 16:12:06 +0000 (13:12 -0300)]
[media] rtl28xxu: auto-select more DVB-frontends and tuners
This adds the missing auto-select bits for DVB-frontends and tuners
(if MEDIA_SUBDRV_AUTOSELECT is enabled) which are used by the various
rtl28xxu devices.
The driver itself probes for three more tuners, but it's not actually
using any of them:
- MEDIA_TUNER_MT2063
- MEDIA_TUNER_MT2266
- MEDIA_TUNER_MXL5007T
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Antti Palosaari [Sat, 14 May 2016 05:08:15 +0000 (08:08 +0300)]
[media] mn88472: move out of staging to media
Move mn88472 DVB-T/T2/C demod driver out of staging to media.
v2: Fix build error reported by kbuild test robot:
drivers/staging/media/mn88472/Makefile: No such file or directory
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Antti Palosaari [Fri, 13 May 2016 15:19:19 +0000 (12:19 -0300)]
[media] mn88472: finalize driver
Finalize driver in order to move out of staging.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Julia Lawall [Tue, 17 May 2016 14:38:42 +0000 (11:38 -0300)]
[media] mn88472: fix typo
firmare -> firmware
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Antti Palosaari [Fri, 13 May 2016 15:08:45 +0000 (12:08 -0300)]
[media] rtl28xxu: increase failed I2C msg repeat count to 3
1 and 2 wasn't enough for mn88472 chip on Astrometa device,
so increase it to 3.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Julia Lawall [Tue, 17 May 2016 14:38:41 +0000 (11:38 -0300)]
[media] mn88473: fix typo
firmare -> firmware
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Antti Palosaari [Sat, 14 May 2016 05:29:21 +0000 (02:29 -0300)]
[media] mn88473: fix error path on probe()
Latest, 3rd, regmap instance should be freed on error case.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Hans Verkuil [Thu, 2 Jun 2016 07:10:58 +0000 (04:10 -0300)]
[media] staging/media: remove deprecated timb driver
Remove this deprecated old driver.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Richard Röjfors <richard@puffinpack.se>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Hans Verkuil [Thu, 2 Jun 2016 07:09:32 +0000 (04:09 -0300)]
[media] staging/media: remove deprecated omap1 driver
Remove this deprecated old driver.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Hans Verkuil [Thu, 2 Jun 2016 07:07:49 +0000 (04:07 -0300)]
[media] staging/media: remove deprecated mx3 driver
Remove this deprecated old driver.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Hans Verkuil [Thu, 2 Jun 2016 07:03:47 +0000 (04:03 -0300)]
[media] staging/media: remove deprecated mx2 driver
Remove this deprecated old driver.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
ayaka [Sat, 7 May 2016 05:05:26 +0000 (02:05 -0300)]
[media] s5p-mfc: fix a typo in s5p_mfc_dec
It is a cosmetic commit.
Signed-off-by: ayaka <ayaka@soulik.info>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
ayaka [Sat, 7 May 2016 05:05:25 +0000 (02:05 -0300)]
[media] s5p-mfc: remove unnecessary check in try_fmt
We don't need to request the sizeimage or num_planes
in try_fmt.
Signed-off-by: ayaka <ayaka@soulik.info>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
ayaka [Sat, 7 May 2016 05:05:24 +0000 (02:05 -0300)]
[media] s5p-mfc: Add handling of buffer freeing reqbufs request
The encoder forget the work to call hardware to release its buffers.
This patch came from chromium project. I just change its code
style and make the API match with new kernel.
Signed-off-by: ayaka <ayaka@soulik.info>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Abylay Ospan [Tue, 7 Jun 2016 15:33:57 +0000 (11:33 -0400)]
MAINTAINERS: Add Sony Helene TV tuner entry
I'm maintainer for Sony Helene tuner (drivers/media/dvb-frontends/helene.*)
Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Mauro Carvalho Chehab [Tue, 7 Jun 2016 15:18:40 +0000 (12:18 -0300)]
[media] helene: fix a warning when printing sizeof()
drivers/media/dvb-frontends/helene.c: In function 'helene_write_regs':
drivers/media/dvb-frontends/helene.c:312:5: warning: format '%lu' expects argument of type 'long unsigned int', but argument 5 has type 'unsigned int' [-Wformat=]
"wr reg=%04x: len=%d vs %lu is too big!\n",
^
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Abylay Ospan [Mon, 16 May 2016 14:57:04 +0000 (11:57 -0300)]
[media] fix typo in SONY demodulator description
correct is CXD2841ER and CXD2854ER
incorrect was CXD2441ER and CXD2454ER
Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Abylay Ospan [Sat, 14 May 2016 03:08:40 +0000 (00:08 -0300)]
[media] Change frontend allocation strategy for NetUP Universal DVB cards
Old behaviour:
frontend0 - DVB-S/S2
frontend1 - DVB-T/T2
frontend2 - DVB-C
frontend3 - ISDB-T
New behaviour (DVBv5 API compliant):
frontend0 - DVB-S/S2
frontend1 - DVB-T/T2/C/ISDB-T
DTV standard should be selected by DTV_DELIVERY_SYSTEM call.
And DVB-C default bandwidth now 8MHz
Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Abylay Ospan [Mon, 16 May 2016 14:43:25 +0000 (11:43 -0300)]
[media] support DVB-T2 for SONY CXD2841/54
bandwidth 1.7,5,6,7,8Mhz support for DVB-T2
Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Abylay Ospan [Thu, 12 May 2016 03:02:04 +0000 (00:02 -0300)]
[media] fix DVB-S/S2 tuning
Fixed HELENE tuner frequency calculation
Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Mauro Carvalho Chehab [Wed, 4 May 2016 21:25:38 +0000 (18:25 -0300)]
[media] ISDB-T retune and offset fix and DVB-C bw fix
now when new tuning parameters specified demod should retune.
Also ISDB-T frequency offset calculation added
(cxd2841er_get_carrier_offset_i).
While here, fix re-tune for DVB-C Annex A, using the desired
bandwidth, instead of using 8MHz.
Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Abylay Ospan [Wed, 20 Apr 2016 17:02:58 +0000 (14:02 -0300)]
[media] Fix DVB-T frequency offset calculation
Fix offset calculation inside cxd2841er_get_carrier_offset_t
Now DVB-T should be tuned correctly
Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Abylay Ospan [Tue, 5 Apr 2016 18:02:37 +0000 (15:02 -0300)]
[media] Sanity check when initializing DVB-S/S2 demodulator
Avoid error message:
cxd2841er_read_status_s(): invalid state 1
Always force demod to shutdown state before initializing
Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Abylay Ospan [Sun, 3 Apr 2016 02:31:50 +0000 (23:31 -0300)]
[media] Add carrier offset calculation for DVB-T
Adding cxd2841er_get_carrier_offset_t to calculate DVB-T offset
for Sony demodulators CXD2841ER and CXD2854ER
Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Abylay Ospan [Sat, 2 Apr 2016 03:00:58 +0000 (00:00 -0300)]
[media] MAINTAINERS: Add a maintainer for netup_unidvb, cxd2841er, horus3a, ascot2e
I'm second maintainer for netup_unidvb, cxd2841er, horus3a, ascot2e
Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Abylay Ospan [Fri, 1 Apr 2016 21:00:53 +0000 (18:00 -0300)]
[media] Fix CAM module memory read/write
mistakenly membase8_io used instead of membase8_config
in this case we can't read/write CAM module memory (TUPLES)
Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Abylay Ospan [Thu, 24 Mar 2016 01:34:07 +0000 (22:34 -0300)]
[media] New hw revision 1.4 of NetUP Universal DVB card added
New hardware revision of NetUP Universal DVB card (rev 1.4):
* changed tuners (CXD2861ER and CXD2832AER) to CXD2858ER
* changed demodulator (CXD2841ER) to CXD2854ER
card now supports:
DVB-S/S2, DVB-T/T2, DVB-C/C2, ISDB-T
PCI id's assigned for new hardware revision is:
1b55:18f7
Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Abylay Ospan [Thu, 24 Mar 2016 01:31:55 +0000 (22:31 -0300)]
[media] Fix DVB-S/S2 tune for sony ascot3a tuner
* fix buffer length check
* do not rely on ROLLOFF
Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Abylay Ospan [Tue, 22 Mar 2016 22:20:34 +0000 (19:20 -0300)]
[media] Add support Sony CXD2854ER demodulator
CXD2854ER is identical to CXD2841ER except ISDB-T/S added.
New method 'cxd2841er_attach_i' is added
xtal frequency now configurable. Available options:
20.5MHz, 24MHz, 41MHz
Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Abylay Ospan [Tue, 22 Mar 2016 01:19:12 +0000 (22:19 -0300)]
[media] Add support Sony HELENE Sat/Ter Tuner
This is Sony HELENE DVB-S/S2 DVB-T/T2 DVB-C/C2 ISDB-T/S tuner
driver (CXD2858ER).
Tuner is used on NetUP Dual Universal DVB CI card (hardware revision 1.4).
Use 'helene_attach_s' to attach tuner in 'satellite mode'.
Use 'helene_attach' for 'terrestrial mode'.
Satellite delivery systems supported:
DVB-S/S2, ISDB-S
Terrestrial delivery systems supported:
DVB-T/T2, ISDB-T
Cable delivery systems supported:
DVB-C/C2
Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Oliver Neukum [Mon, 2 May 2016 11:23:21 +0000 (08:23 -0300)]
[media] uvcvideo: Correct speed testing
Allow for SS+ USB devices.
Signed-off-by: Oliver Neukum <ONeukum@suse.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Nicolas Dufresne [Thu, 7 Jan 2016 20:43:48 +0000 (18:43 -0200)]
[media] uvcvideo: Fix bytesperline calculation for planar YUV
The formula used to calculate bytesperline only works for packed format.
So far, all planar format we support have their bytesperline equal to
the image width (stride of the Y plane or a line of Y for M420).
Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Andrew-CT Chen [Tue, 3 May 2016 10:11:20 +0000 (07:11 -0300)]
[media] dt-bindings: Add a binding for Mediatek Video Processor
Add a DT binding documentation of Video Processor Unit for the
MT8173 SoC from Mediatek.
Signed-off-by: Andrew-CT Chen <andrew-ct.chen@mediatek.com>
Signed-off-by: Tiffany Lin <tiffany.lin@mediatek.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
ayaka [Fri, 6 May 2016 22:11:22 +0000 (19:11 -0300)]
[media] s5p-mfc: don't close instance after free OUTPUT buffers
User-space applications can use the VIDIOC_REQBUFS ioctl to determine if a
memory mapped, user pointer or DMABUF based I/O is supported by the driver.
So a set of VIDIOC_REQBUFS ioctl calls will be made with count 0 and then
the real VIDIOC_REQBUFS call with count == n. But for count 0, the driver
not only frees the buffer but also closes the MFC instance and s5p_mfc_ctx
state is set to MFCINST_FREE.
The VIDIOC_REQBUFS handler for the output device checks if the s5p_mfc_ctx
state is set to MFCINST_INIT (which happens on an VIDIOC_S_FMT) and fails
otherwise. So after a VIDIOC_REQBUFS(n), future VIDIOC_REQBUFS(n) calls
will fails unless a VIDIOC_S_FMT ioctl calls happens before the reqbufs.
But applications may first set the format and then attempt to determine
the I/O methods supported by the driver (for example Gstramer does it) so
the state won't be set to MFCINST_INIT again and VIDIOC_REQBUFS will fail.
To avoid this issue, only free the buffers on VIDIOC_REQBUFS(0) but don't
close the MFC instance to allow future VIDIOC_REQBUFS(n) calls to succeed.
[javier: Rewrote changelog to explain the problem more detailed]
Signed-off-by: ayaka <ayaka@soulik.info>
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Acked-by: Nicolas Dufresne <nicolas@collabora.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Javier Martinez Canillas [Mon, 2 May 2016 19:14:22 +0000 (16:14 -0300)]
[media] s5p-mfc: Don't try to put pm->clock if lookup failed
Failing to get the struct s5p_mfc_pm .clock is a non-fatal error so the
clock field can have a errno pointer value. But s5p_mfc_final_pm() only
checks if .clock is not NULL before attempting to unprepare and put it.
This leads to the following warning in clk_put() due s5p_mfc_final_pm():
WARNING: CPU: 3 PID: 1023 at drivers/clk/clk.c:2814 s5p_mfc_final_pm+0x48/0x74 [s5p_mfc]
CPU: 3 PID: 1023 Comm: rmmod Tainted: G W 4.6.0-rc6-next-
20160502-00005-g5a15a49106bc #9
Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
[<
c010e1bc>] (unwind_backtrace) from [<
c010af28>] (show_stack+0x10/0x14)
[<
c010af28>] (show_stack) from [<
c032485c>] (dump_stack+0x88/0x9c)
[<
c032485c>] (dump_stack) from [<
c011b8e8>] (__warn+0xe8/0x100)
[<
c011b8e8>] (__warn) from [<
c011b9b0>] (warn_slowpath_null+0x20/0x28)
[<
c011b9b0>] (warn_slowpath_null) from [<
bf16004c>] (s5p_mfc_final_pm+0x48/0x74 [s5p_mfc])
[<
bf16004c>] (s5p_mfc_final_pm [s5p_mfc]) from [<
bf157414>] (s5p_mfc_remove+0x8c/0x94 [s5p_mfc])
[<
bf157414>] (s5p_mfc_remove [s5p_mfc]) from [<
c03fe1f8>] (platform_drv_remove+0x24/0x3c)
[<
c03fe1f8>] (platform_drv_remove) from [<
c03fcc70>] (__device_release_driver+0x84/0x110)
[<
c03fcc70>] (__device_release_driver) from [<
c03fcdd8>] (driver_detach+0xac/0xb0)
[<
c03fcdd8>] (driver_detach) from [<
c03fbff8>] (bus_remove_driver+0x4c/0xa0)
[<
c03fbff8>] (bus_remove_driver) from [<
c01886a8>] (SyS_delete_module+0x174/0x1b8)
[<
c01886a8>] (SyS_delete_module) from [<
c01078c0>] (ret_fast_syscall+0x0/0x3c)
Assign the pointer to NULL in case of a lookup failure to fix the issue.
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Marek Szyprowski [Tue, 7 Jun 2016 11:32:16 +0000 (08:32 -0300)]
[media] media: s5p-mfc: fix compilation issue on archs other than ARM (32bit)
This patch fixes build break caused by lack of dma-iommu API on ARM64
(this API is specific to ARM 32bit architecture).
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Mauro Carvalho Chehab [Tue, 7 Jun 2016 13:21:12 +0000 (10:21 -0300)]
Merge branch 'for-v4.8/media/exynos-mfc' of git://linuxtv.org/snawrocki/samsung into patchwork
* 'for-v4.8/media/exynos-mfc' of git://linuxtv.org/snawrocki/samsung:
media: s5p-mfc: add iommu support
media: s5p-mfc: replace custom reserved memory handling code with generic one
media: s5p-mfc: use generic reserved memory bindings
of: reserved_mem: add support for using more than one region for given device
media: set proper max seg size for devices on Exynos SoCs
media: vb2-dma-contig: add helper for setting dma max seg size
s5p-mfc: Fix race between s5p_mfc_probe() and s5p_mfc_open()
s5p-mfc: Add release callback for memory region devs
s5p-mfc: Set device name for reserved memory region devs
Marek Szyprowski [Tue, 24 May 2016 13:31:27 +0000 (15:31 +0200)]
media: s5p-mfc: add iommu support
This patch adds support for IOMMU to s5p-mfc device driver. MFC firmware
is limited and it cannot use the default configuration. If IOMMU is
available, the patch disables the default DMA address space
configuration and creates a new address space of size limited to 256M
and base address set to 0x20000000.
For now the same address space is shared by both 'left' and 'right'
memory channels, because the DMA/IOMMU frameworks do not support
configuring them separately. This is not optimal, but besides limiting
total address space available has no other drawbacks (MFC firmware
supports 256M of address space per each channel).
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Marek Szyprowski [Tue, 24 May 2016 13:31:26 +0000 (15:31 +0200)]
media: s5p-mfc: replace custom reserved memory handling code with generic one
This patch removes custom code for initialization and handling of
reserved memory regions in s5p-mfc driver and replaces it with generic
reserved memory regions api.
s5p-mfc driver now handles two reserved memory regions defined by
generic reserved memory bindings. Support for non-dt platform has been
removed, because all supported platforms have been already converted to
device tree.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Marek Szyprowski [Tue, 24 May 2016 13:31:25 +0000 (15:31 +0200)]
media: s5p-mfc: use generic reserved memory bindings
Use generic reserved memory bindings and mark old, custom properties
as obsoleted.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Marek Szyprowski [Tue, 24 May 2016 13:31:24 +0000 (15:31 +0200)]
of: reserved_mem: add support for using more than one region for given device
This patch allows device drivers to initialize more than one reserved
memory region assigned to given device. When driver needs to use more
than one reserved memory region, it should allocate child devices and
initialize regions by index for each of its child devices.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Marek Szyprowski [Tue, 24 May 2016 07:16:07 +0000 (09:16 +0200)]
media: set proper max seg size for devices on Exynos SoCs
All multimedia devices found on Exynos SoCs support only contiguous
buffers, so set DMA max segment size to DMA_BIT_MASK(32) to let memory
allocator to correctly create contiguous memory mappings.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Marek Szyprowski [Tue, 24 May 2016 07:16:06 +0000 (09:16 +0200)]
media: vb2-dma-contig: add helper for setting dma max seg size
Add a helper function for device drivers to set DMA's max_seg_size.
Setting it to largest possible value lets DMA-mapping API always create
contiguous mappings in DMA address space. This is essential for all
devices, which use dma-contig videobuf2 memory allocator and shared
buffers.
Till now, the only case when vb2-dma-contig really 'worked' was a case
where userspace provided USERPTR buffer, which was in fact mmaped
contiguous buffer from the other v4l2/drm device. Also DMABUF made of
contiguous buffer worked only when its exporter did not split it into
several chunks in the scatter-list. Any other buffer failed, regardless
of the arch/platform used and the presence of the IOMMU of the device bus.
This patch provides interface to fix this issue.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Javier Martinez Canillas [Tue, 3 May 2016 20:27:18 +0000 (16:27 -0400)]
s5p-mfc: Fix race between s5p_mfc_probe() and s5p_mfc_open()
The s5p_mfc_probe() function registers the video devices before all the
resources needed by s5p_mfc_open() are correctly initalized.
So if s5p_mfc_open() function is called before s5p_mfc_probe() finishes
(since the video dev is already registered), a NULL pointer dereference
will happen due s5p_mfc_open() accessing uninitialized vars such as the
struct s5p_mfc_dev .watchdog_timer and .mfc_ops fields.
An example is following BUG caused by add_timer() getting a NULL pointer:
[ 45.765374] kernel BUG at kernel/time/timer.c:790!
[ 45.765381] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM
...
[ 45.766149] [<
c016fdf4>] (mod_timer) from [<
bf181d18>] (s5p_mfc_open+0x274/0x4d4 [s5p_mfc])
[ 45.766416] [<
bf181d18>] (s5p_mfc_open [s5p_mfc]) from [<
bf0214a0>] (v4l2_open+0x9c/0x100 [videodev])
[ 45.766547] [<
bf0214a0>] (v4l2_open [videodev]) from [<
c01e355c>] (chrdev_open+0x9c/0x178)
[ 45.766575] [<
c01e355c>] (chrdev_open) from [<
c01dceb4>] (do_dentry_open+0x1e0/0x300)
[ 45.766595] [<
c01dceb4>] (do_dentry_open) from [<
c01ec2f0>] (path_openat+0x800/0x10d4)
[ 45.766610] [<
c01ec2f0>] (path_openat) from [<
c01ed8b8>] (do_filp_open+0x5c/0xc0)
[ 45.766624] [<
c01ed8b8>] (do_filp_open) from [<
c01de218>] (do_sys_open+0x10c/0x1bc)
[ 45.766642] [<
c01de218>] (do_sys_open) from [<
c01078c0>] (ret_fast_syscall+0x0/0x3c)
[ 45.766655] Code:
eaffffe3 e3a00001 e28dd008 e8bd81f0 (
e7f001f2)
Fix it by registering the video devs as the last step in s5p_mfc_probe().
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Javier Martinez Canillas [Tue, 3 May 2016 20:27:17 +0000 (16:27 -0400)]
s5p-mfc: Add release callback for memory region devs
When s5p_mfc_remove() calls put_device() for the reserved memory region
devs, the driver core warns that the dev doesn't have a release callback:
WARNING: CPU: 0 PID: 591 at drivers/base/core.c:251 device_release+0x8c/0x90
Device 's5p-mfc-l' does not have a release() function, it is broken and must be fixed.
Also, the declared DMA memory using dma_declare_coherent_memory() isn't
relased so add a dev .release that calls dma_release_declared_memory().
Cc: <stable@vger.kernel.org>
Fixes:
6e83e6e25eb4 ("[media] s5p-mfc: Fix kernel warning on memory init")
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Javier Martinez Canillas [Tue, 3 May 2016 20:27:16 +0000 (16:27 -0400)]
s5p-mfc: Set device name for reserved memory region devs
The devices don't have a name set, so makes dev_name() returns NULL which
makes harder to identify the devices that are causing issues, for example:
WARNING: CPU: 2 PID: 616 at drivers/base/core.c:251 device_release+0x8c/0x90
Device '(null)' does not have a release() function, it is broken and must be fixed.
And after setting the device name:
WARNING: CPU: 0 PID: 591 at drivers/base/core.c:251 device_release+0x8c/0x90
Device 's5p-mfc-l' does not have a release() function, it is broken and must be fixed.
Cc: <stable@vger.kernel.org>
Fixes:
6e83e6e25eb4 ("[media] s5p-mfc: Fix kernel warning on memory init")
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Mauro Carvalho Chehab [Mon, 30 May 2016 21:16:14 +0000 (18:16 -0300)]
Merge tag 'v4.7-rc1' into patchwork
Linux 4.7-rc1
* tag 'v4.7-rc1': (10534 commits)
Linux 4.7-rc1
hash_string: Fix zero-length case for !DCACHE_WORD_ACCESS
Rename other copy of hash_string to hashlen_string
hpfs: implement the show_options method
affs: fix remount failure when there are no options changed
hpfs: fix remount failure when there are no options changed
fs: fix binfmt_aout.c build error
h8300: Add <asm/hash.h>
microblaze: Add <asm/hash.h>
m68k: Add <asm/hash.h>
<linux/hash.h>: Add support for architecture-specific functions
fs/namei.c: Improve dcache hash function
Eliminate bad hash multipliers from hash_32() and hash_64()
Change hash_64() return value to 32 bits
<linux/sunrpc/svcauth.h>: Define hash_str() in terms of hashlen_string()
fs/namei.c: Add hashlen_string() function
Pull out string hash to <linux/stringhash.h>
Revert "platform/chrome: chromeos_laptop: Add Leon Touch"
i2c: dev: use after free in detach
MIPS: Add missing FROZEN hotplug notifier transitions
...
Linus Torvalds [Sun, 29 May 2016 16:29:24 +0000 (09:29 -0700)]
Linux 4.7-rc1
George Spelvin [Sun, 29 May 2016 12:05:56 +0000 (08:05 -0400)]
hash_string: Fix zero-length case for !DCACHE_WORD_ACCESS
The self-test was updated to cover zero-length strings; the function
needs to be updated, too.
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Fixes:
fcfd2fbf22d2 ("fs/namei.c: Add hashlen_string() function")
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
George Spelvin [Sun, 29 May 2016 05:26:41 +0000 (01:26 -0400)]
Rename other copy of hash_string to hashlen_string
The original name was simply hash_string(), but that conflicted with a
function with that name in drivers/base/power/trace.c, and I decided
that calling it "hashlen_" was better anyway.
But you have to do it in two places.
[ This caused build errors for architectures that don't define
CONFIG_DCACHE_WORD_ACCESS - Linus ]
Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Fixes:
fcfd2fbf22d2 ("fs/namei.c: Add hashlen_string() function")
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Mikulas Patocka [Tue, 24 May 2016 20:49:18 +0000 (22:49 +0200)]
hpfs: implement the show_options method
The HPFS filesystem used generic_show_options to produce string that is
displayed in /proc/mounts. However, there is a problem that the options
may disappear after remount. If we mount the filesystem with option1
and then remount it with option2, /proc/mounts should show both option1
and option2, however it only shows option2 because the whole option
string is replaced with replace_mount_options in hpfs_remount_fs.
To fix this bug, implement the hpfs_show_options function that prints
options that are currently selected.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Mikulas Patocka [Tue, 24 May 2016 20:48:33 +0000 (22:48 +0200)]
affs: fix remount failure when there are no options changed
Commit
c8f33d0bec99 ("affs: kstrdup() memory handling") checks if the
kstrdup function returns NULL due to out-of-memory condition.
However, if we are remounting a filesystem with no change to
filesystem-specific options, the parameter data is NULL. In this case,
kstrdup returns NULL (because it was passed NULL parameter), although no
out of memory condition exists. The mount syscall then fails with
ENOMEM.
This patch fixes the bug. We fail with ENOMEM only if data is non-NULL.
The patch also changes the call to replace_mount_options - if we didn't
pass any filesystem-specific options, we don't call
replace_mount_options (thus we don't erase existing reported options).
Fixes:
c8f33d0bec99 ("affs: kstrdup() memory handling")
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org # v4.1+
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Mikulas Patocka [Tue, 24 May 2016 20:47:00 +0000 (22:47 +0200)]
hpfs: fix remount failure when there are no options changed
Commit
ce657611baf9 ("hpfs: kstrdup() out of memory handling") checks if
the kstrdup function returns NULL due to out-of-memory condition.
However, if we are remounting a filesystem with no change to
filesystem-specific options, the parameter data is NULL. In this case,
kstrdup returns NULL (because it was passed NULL parameter), although no
out of memory condition exists. The mount syscall then fails with
ENOMEM.
This patch fixes the bug. We fail with ENOMEM only if data is non-NULL.
The patch also changes the call to replace_mount_options - if we didn't
pass any filesystem-specific options, we don't call
replace_mount_options (thus we don't erase existing reported options).
Fixes:
ce657611baf9 ("hpfs: kstrdup() out of memory handling")
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sat, 28 May 2016 23:41:39 +0000 (16:41 -0700)]
Merge branch 'upstream' of git://git.linux-mips.org/ralf/upstream-linus
Pull more MIPS updates from Ralf Baechle:
"This is the secondnd batch of MIPS patches for 4.7. Summary:
CPS:
- Copy EVA configuration when starting secondary VPs.
EIC:
- Clear Status IPL.
Lasat:
- Fix a few off by one bugs.
lib:
- Mark intrinsics notrace. Not only are the intrinsics
uninteresting, it would cause infinite recursion.
MAINTAINERS:
- Add file patterns for MIPS BRCM device tree bindings.
- Add file patterns for mips device tree bindings.
MT7628:
- Fix MT7628 pinmux typos.
- wled_an pinmux gpio.
- EPHY LEDs pinmux support.
Pistachio:
- Enable KASLR
VDSO:
- Build microMIPS VDSO for microMIPS kernels.
- Fix aliasing warning by building with `-fno-strict-aliasing' for
debugging but also tracing them might result in recursion.
Misc:
- Add missing FROZEN hotplug notifier transitions.
- Fix clk binding example for varioius PIC32 devices.
- Fix cpu interrupt controller node-names in the DT files.
- Fix XPA CPU feature separation.
- Fix write_gc0_* macros when writing zero.
- Add inline asm encoding helpers.
- Add missing VZ accessor microMIPS encodings.
- Fix little endian microMIPS MSA encodings.
- Add 64-bit HTW fields and fix its configuration.
- Fix sigreturn via VDSO on microMIPS kernel.
- Lots of typo fixes.
- Add definitions of SegCtl registers and use them"
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (49 commits)
MIPS: Add missing FROZEN hotplug notifier transitions
MIPS: Build microMIPS VDSO for microMIPS kernels
MIPS: Fix sigreturn via VDSO on microMIPS kernel
MIPS: devicetree: fix cpu interrupt controller node-names
MIPS: VDSO: Build with `-fno-strict-aliasing'
MIPS: Pistachio: Enable KASLR
MIPS: lib: Mark intrinsics notrace
MIPS: Fix 64-bit HTW configuration
MIPS: Add 64-bit HTW fields
MAINTAINERS: Add file patterns for mips device tree bindings
MAINTAINERS: Add file patterns for mips brcm device tree bindings
MIPS: Simplify DSP instruction encoding macros
MIPS: Add missing tlbinvf/XPA microMIPS encodings
MIPS: Fix little endian microMIPS MSA encodings
MIPS: Add missing VZ accessor microMIPS encodings
MIPS: Add inline asm encoding helpers
MIPS: Spelling fix lets -> let's
MIPS: VR41xx: Fix typo
MIPS: oprofile: Fix typo
MIPS: math-emu: Fix typo
...
Guenter Roeck [Sat, 28 May 2016 22:26:02 +0000 (15:26 -0700)]
fs: fix binfmt_aout.c build error
Various builds (such as i386:allmodconfig) fail with
fs/binfmt_aout.c:133:2: error: expected identifier or '(' before 'return'
fs/binfmt_aout.c:134:1: error: expected identifier or '(' before '}' token
[ Oops. My bad, I had stupidly thought that "allmodconfig" covered this
on x86-64 too, but it obviously doesn't. Egg on my face. - Linus ]
Fixes:
5d22fc25d4fc ("mm: remove more IS_ERR_VALUE abuses")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sat, 28 May 2016 23:15:25 +0000 (16:15 -0700)]
Merge branch 'hash' of git://ftp.sciencehorizons.net/linux
Pull string hash improvements from George Spelvin:
"This series does several related things:
- Makes the dcache hash (fs/namei.c) useful for general kernel use.
(Thanks to Bruce for noticing the zero-length corner case)
- Converts the string hashes in <linux/sunrpc/svcauth.h> to use the
above.
- Avoids 64-bit multiplies in hash_64() on 32-bit platforms. Two
32-bit multiplies will do well enough.
- Rids the world of the bad hash multipliers in hash_32.
This finishes the job started in commit
689de1d6ca95 ("Minimal
fix-up of bad hashing behavior of hash_64()")
The vast majority of Linux architectures have hardware support for
32x32-bit multiply and so derive no benefit from "simplified"
multipliers.
The few processors that do not (68000, h8/300 and some models of
Microblaze) have arch-specific implementations added. Those
patches are last in the series.
- Overhauls the dcache hash mixing.
The patch in commit
0fed3ac866ea ("namei: Improve hash mixing if
CONFIG_DCACHE_WORD_ACCESS") was an off-the-cuff suggestion.
Replaced with a much more careful design that's simultaneously
faster and better. (My own invention, as there was noting suitable
in the literature I could find. Comments welcome!)
- Modify the hash_name() loop to skip the initial HASH_MIX(). This
would let us salt the hash if we ever wanted to.
- Sort out partial_name_hash().
The hash function is declared as using a long state, even though
it's truncated to 32 bits at the end and the extra internal state
contributes nothing to the result. And some callers do odd things:
- fs/hfs/string.c only allocates 32 bits of state
- fs/hfsplus/unicode.c uses it to hash 16-bit unicode symbols not bytes
- Modify bytemask_from_count to handle inputs of 1..sizeof(long)
rather than 0..sizeof(long)-1. This would simplify users other
than full_name_hash"
Special thanks to Bruce Fields for testing and finding bugs in v1. (I
learned some humbling lessons about "obviously correct" code.)
On the arch-specific front, the m68k assembly has been tested in a
standalone test harness, I've been in contact with the Microblaze
maintainers who mostly don't care, as the hardware multiplier is never
omitted in real-world applications, and I haven't heard anything from
the H8/300 world"
* 'hash' of git://ftp.sciencehorizons.net/linux:
h8300: Add <asm/hash.h>
microblaze: Add <asm/hash.h>
m68k: Add <asm/hash.h>
<linux/hash.h>: Add support for architecture-specific functions
fs/namei.c: Improve dcache hash function
Eliminate bad hash multipliers from hash_32() and hash_64()
Change hash_64() return value to 32 bits
<linux/sunrpc/svcauth.h>: Define hash_str() in terms of hashlen_string()
fs/namei.c: Add hashlen_string() function
Pull out string hash to <linux/stringhash.h>
George Spelvin [Wed, 25 May 2016 18:19:49 +0000 (14:19 -0400)]
h8300: Add <asm/hash.h>
This will improve the performance of hash_32() and hash_64(), but due
to complete lack of multi-bit shift instructions on H8, performance will
still be bad in surrounding code.
Designing H8-specific hash algorithms to work around that is a separate
project. (But if the maintainers would like to get in touch...)
Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: uclinux-h8-devel@lists.sourceforge.jp
George Spelvin [Wed, 25 May 2016 15:06:09 +0000 (11:06 -0400)]
microblaze: Add <asm/hash.h>
Microblaze is an FPGA soft core that can be configured various ways.
If it is configured without a multiplier, the standard __hash_32()
will require a call to __mulsi3, which is a slow software loop.
Instead, use a shift-and-add sequence for the constant multiply.
GCC knows how to do this, but it's not as clever as some.
Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Cc: Alistair Francis <alistair.francis@xilinx.com>
Cc: Michal Simek <michal.simek@xilinx.com>
George Spelvin [Thu, 26 May 2016 15:36:19 +0000 (11:36 -0400)]
m68k: Add <asm/hash.h>
This provides a multiply by constant GOLDEN_RATIO_32 = 0x61C88647
for the original mc68000, which lacks a 32x32-bit multiply instruction.
Yes, the amount of optimization effort put in is excessive. :-)
Shift-add chain found by Yevgen Voronenko's Hcub algorithm at
http://spiral.ece.cmu.edu/mcm/gen.html
Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: Andreas Schwab <schwab@linux-m68k.org>
Cc: Philippe De Muyter <phdm@macq.eu>
Cc: linux-m68k@lists.linux-m68k.org
George Spelvin [Fri, 27 May 2016 02:11:51 +0000 (22:11 -0400)]
<linux/hash.h>: Add support for architecture-specific functions
This is just the infrastructure; there are no users yet.
This is modelled on CONFIG_ARCH_RANDOM; a CONFIG_ symbol declares
the existence of <asm/hash.h>.
That file may define its own versions of various functions, and define
HAVE_* symbols (no CONFIG_ prefix!) to suppress the generic ones.
Included is a self-test (in lib/test_hash.c) that verifies the basics.
It is NOT in general required that the arch-specific functions compute
the same thing as the generic, but if a HAVE_* symbol is defined with
the value 1, then equality is tested.
Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: Andreas Schwab <schwab@linux-m68k.org>
Cc: Philippe De Muyter <phdm@macq.eu>
Cc: linux-m68k@lists.linux-m68k.org
Cc: Alistair Francis <alistai@xilinx.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: uclinux-h8-devel@lists.sourceforge.jp
George Spelvin [Mon, 23 May 2016 11:43:58 +0000 (07:43 -0400)]
fs/namei.c: Improve dcache hash function
Patch
0fed3ac866 improved the hash mixing, but the function is slower
than necessary; there's a 7-instruction dependency chain (10 on x86)
each loop iteration.
Word-at-a-time access is a very tight loop (which is good, because
link_path_walk() is one of the hottest code paths in the entire kernel),
and the hash mixing function must not have a longer latency to avoid
slowing it down.
There do not appear to be any published fast hash functions that:
1) Operate on the input a word at a time, and
2) Don't need to know the length of the input beforehand, and
3) Have a single iterated mixing function, not needing conditional
branches or unrolling to distinguish different loop iterations.
One of the algorithms which comes closest is Yann Collet's xxHash, but
that's two dependent multiplies per word, which is too much.
The key insights in this design are:
1) Barring expensive ops like multiplies, to diffuse one input bit
across 64 bits of hash state takes at least log2(64) = 6 sequentially
dependent instructions. That is more cycles than we'd like.
2) An operation like "hash ^= hash << 13" requires a second temporary
register anyway, and on a 2-operand machine like x86, it's three
instructions.
3) A better use of a second register is to hold a two-word hash state.
With careful design, no temporaries are needed at all, so it doesn't
increase register pressure. And this gets rid of register copying
on 2-operand machines, so the code is smaller and faster.
4) Using two words of state weakens the requirement for one-round mixing;
we now have two rounds of mixing before cancellation is possible.
5) A two-word hash state also allows operations on both halves to be
done in parallel, so on a superscalar processor we get more mixing
in fewer cycles.
I ended up using a mixing function inspired by the ChaCha and Speck
round functions. It is 6 simple instructions and 3 cycles per iteration
(assuming multiply by 9 can be done by an "lea" instruction):
x ^= *input++;
y ^= x; x = ROL(x, K1);
x += y; y = ROL(y, K2);
y *= 9;
Not only is this reversible, two consecutive rounds are reversible:
if you are given the initial and final states, but not the intermediate
state, it is possible to compute both input words. This means that at
least 3 words of input are required to create a collision.
(It also has the property, used by hash_name() to avoid a branch, that
it hashes all-zero to all-zero.)
The rotate constants K1 and K2 were found by experiment. The search took
a sample of random initial states (I used 1023) and considered the effect
of flipping each of the 64 input bits on each of the 128 output bits two
rounds later. Each of the 8192 pairs can be considered a biased coin, and
adding up the Shannon entropy of all of them produces a score.
The best-scoring shifts also did well in other tests (flipping bits in y,
trying 3 or 4 rounds of mixing, flipping all 64*63/2 pairs of input bits),
so the choice was made with the additional constraint that the sum of the
shifts is odd and not too close to the word size.
The final state is then folded into a 32-bit hash value by a less carefully
optimized multiply-based scheme. This also has to be fast, as pathname
components tend to be short (the most common case is one iteration!), but
there's some room for latency, as there is a fair bit of intervening logic
before the hash value is used for anything.
(Performance verified with "bonnie++ -s 0 -n 1536:-2" on tmpfs. I need
a better benchmark; the numbers seem to show a slight dip in performance
between 4.6.0 and this patch, but they're too noisy to quote.)
Special thanks to Bruce fields for diligent testing which uncovered a
nasty fencepost error in an earlier version of this patch.
[checkpatch.pl formatting complaints noted and respectfully disagreed with.]
Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Tested-by: J. Bruce Fields <bfields@redhat.com>
George Spelvin [Fri, 27 May 2016 03:00:23 +0000 (23:00 -0400)]
Eliminate bad hash multipliers from hash_32() and hash_64()
The "simplified" prime multipliers made very bad hash functions, so get rid
of them. This completes the work of
689de1d6ca.
To avoid the inefficiency which was the motivation for the "simplified"
multipliers, hash_64() on 32-bit systems is changed to use a different
algorithm. It makes two calls to hash_32() instead.
drivers/media/usb/dvb-usb-v2/af9015.c uses the old GOLDEN_RATIO_PRIME_32
for some horrible reason, so it inherits a copy of the old definition.
Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Cc: Antti Palosaari <crope@iki.fi>
Cc: Mauro Carvalho Chehab <m.chehab@samsung.com>
George Spelvin [Fri, 27 May 2016 02:22:01 +0000 (22:22 -0400)]
Change hash_64() return value to 32 bits
That's all that's ever asked for, and it makes the return
type of hash_long() consistent.
It also allows (upcoming patch) an optimized implementation
of hash_64 on 32-bit machines.
I tried adding a BUILD_BUG_ON to ensure the number of bits requested
was never more than 32 (most callers use a compile-time constant), but
adding <linux/bug.h> to <linux/hash.h> breaks the tools/perf compiler
unless tools/perf/MANIFEST is updated, and understanding that code base
well enough to update it is too much trouble. I did the rest of an
allyesconfig build with such a check, and nothing tripped.
Signed-off-by: George Spelvin <linux@sciencehorizons.net>
George Spelvin [Fri, 20 May 2016 17:31:33 +0000 (13:31 -0400)]
<linux/sunrpc/svcauth.h>: Define hash_str() in terms of hashlen_string()
Finally, the first use of previous two patches: eliminate the
separate ad-hoc string hash functions in the sunrpc code.
Now hash_str() is a wrapper around hash_string(), and hash_mem() is
likewise a wrapper around full_name_hash().
Note that sunrpc code *does* call hash_mem() with a zero length, which
is why the previous patch needed to handle that in full_name_hash().
(Thanks, Bruce, for finding that!)
This also eliminates the only caller of hash_long which asks for
more than 32 bits of output.
The comment about the quality of hashlen_string() and full_name_hash()
is jumping the gun by a few patches; they aren't very impressive now,
but will be improved greatly later in the series.
Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Tested-by: J. Bruce Fields <bfields@redhat.com>
Acked-by: J. Bruce Fields <bfields@redhat.com>
Cc: Jeff Layton <jlayton@poochiereds.net>
Cc: linux-nfs@vger.kernel.org