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commit 5a96b2d38dc054c0bbcbcd585b116566cbd877fe upstream.
The compatibility ioctl wrapper for VCHIQ_IOC_AWAIT_COMPLETION assumes that
the native ioctl always uses a message buffer and decrements msgbufcount.
Certain message types do not use a message buffer and in this case
msgbufcount is not decremented, and completion->header for the message is
NULL. Because the wrapper unconditionally decrements msgbufcount, the
calling process may assume that a message buffer has been used even when
it has not.
This results in a memory leak in the userspace code that interfaces with
this driver. When msgbufcount is decremented, the userspace code assumes
that the buffer can be freed though the reference in completion->header,
which cannot happen when the reference is NULL.
This patch causes the wrapper to only decrement msgbufcount when the
native ioctl decrements it. Note that we cannot simply copy the native
ioctl's value of msgbufcount, because the wrapper only retrieves messages
from the native ioctl one at a time, while userspace may request multiple
messages.
See https://github.com/raspberrypi/linux/pull/2703 for more discussion of
this patch.
Fixes: 5569a1260933 ("staging: vchiq_arm: Add compatibility wrappers for ioctls")
Signed-off-by: Ben Wolsieffer <benwolsieffer@gmail.com>
Acked-by: Stefan Wahren <stefan.wahren@i2se.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging and IIO updates from Greg KH:
"Here are the big staging/iio patches for 4.19-rc1.
Lots of churn here, with tons of cleanups happening in staging
drivers, a removal of an old crypto driver that no one was using
(skein), and the addition of some new IIO drivers. Also added was a
"gasket" driver from Google that needs loads of work and the erofs
filesystem.
Even with adding all of the new drivers and a new filesystem, we are
only adding about 1000 lines overall to the kernel linecount, which
shows just how much cleanup happened, and how big the unused crypto
driver was.
All of these have been in the linux-next tree for a while now with no
reported issues"
* tag 'staging-4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (903 commits)
staging:rtl8192u: Remove unused macro definitions - Style
staging:rtl8192u: Add spaces around '+' operator - Style
staging:rtl8192u: Remove stale comment - Style
staging: rtl8188eu: remove unused mp_custom_oid.h
staging: fbtft: Add spaces around / - Style
staging: fbtft: Erases some repetitive usage of function name - Style
staging: fbtft: Adjust some empty-line problems - Style
staging: fbtft: Removes one nesting level to help readability - Style
staging: fbtft: Changes gamma table to define.
staging: fbtft: A bit more information on dev_err.
staging: fbtft: Fixes some alignment issues - Style
staging: fbtft: Puts macro arguments in parenthesis to avoid precedence issues - Style
staging: rtl8188eu: remove unused array dB_Invert_Table
staging: rtl8188eu: remove whitespace, add missing blank line
staging: rtl8188eu: use is_multicast_ether_addr in rtw_sta_mgt.c
staging: rtl8188eu: remove whitespace - style
staging: rtl8188eu: cleanup block comment - style
staging: rtl8188eu: use is_multicast_ether_addr in rtl8188eu_xmit.c
staging: rtl8188eu: use is_multicast_ether_addr in recv_linux.c
staging: rtlwifi: refactor rtl_get_tcb_desc
...
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wait_for_completion_timeout returns unsigned long not int so a variable of
proper type is introduced. Further the check for <= 0 is ambiguous and should
be == 0 here indicating timeout which is the only error case so no additional
check needed here.
Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Fixes: 7b3ad5abf027 ("staging: Import the BCM2835 MMAL-based V4L2 camera driver.")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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wait_for_completion_timeout returns unsigned long not int so a variable of
proper type is introduced. Further the check for <= 0 is ambiguous and
should be == 0 here indicating timeout.
Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Fixes: 7b3ad5abf027 ("staging: Import the BCM2835 MMAL-based V4L2 camera driver.")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Currently, if bcm2835_audio_open() fails partway, the allocated
workqueue is leaked. Avoid that.
While at it, propagate the return value of
bcm2835_audio_open_connection() on failure instead of returning -1.
Signed-off-by: Tuomas Tynkkynen <tuomas@tuxera.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Currently, if allocating a workqueue fails, the driver will probe
successfully but it will silently do nothing, which is rather silly.
So instead bail out with -ENOMEM in bcm2835_audio_open() if
alloc_workqueue() fails, and remove the now pointless checks for a NULL
workqueue.
While at it, get rid of the rather pointless one-line function
my_workqueue_init().
Signed-off-by: Tuomas Tynkkynen <tuomas@tuxera.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Use the device mutex to protect the vb2_queue.
This allows to replace the ad-hoc wait_{prepare, finish}
with vb2_ops_wait_{prepare, finish}.
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
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The pointers vchiq_dbg_dir and vchiq_dbg_clients are local to the
source and do not need to be in global scope, so make them static.
Cleans up sparse warnings:
warning: symbol 'vchiq_dbg_dir' was not declared. Should it be static?
warning: symbol 'vchiq_dbg_clients' was not declared. Should it be static?
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The log entry dentries are only set, never referenced, so no need to
keep them around. Remove the pointer from struct
vchiq_debugfs_log_entry as it is not needed anymore and get rid of the
separate vchiq_debugfs_create_log_entries() function as it is only used
in one place.
Suggested-by: Eric Anholt <eric@anholt.net>
Cc: Stefan Wahren <stefan.wahren@i2se.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Keerthi Reddy <keerthigd4990@gmail.com>
Cc: linux-rpi-kernel@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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There's no need to set this to be int * when it is only used as a void *.
This lets us remove the unneeded cast, and unneeded temporary variable
the one place it is referenced in the code.
Suggested-by: Eric Anholt <eric@anholt.net>
Cc: Stefan Wahren <stefan.wahren@i2se.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Keerthi Reddy <keerthigd4990@gmail.com>
Cc: linux-rpi-kernel@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This structure, and the one static variable that was declared with it,
were not being used for anything. The log_categories field was being
set, but never used again. So just remove it entirely as it is not
needed at all.
Suggested-by: Eric Anholt <eric@anholt.net>
Cc: Stefan Wahren <stefan.wahren@i2se.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Keerthi Reddy <keerthigd4990@gmail.com>
Cc: linux-rpi-kernel@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This does not need to be part of a wrapper function, or in a structure,
just properly reference it directly as a single variable.
The whole variable will be going away soon anyway, this is just a step
toward that direction.
Suggested-by: Eric Anholt <eric@anholt.net>
Cc: Stefan Wahren <stefan.wahren@i2se.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Keerthi Reddy <keerthigd4990@gmail.com>
Cc: linux-rpi-kernel@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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vchiq_debugfs_top() is only a wrapper around a pointer to a dentry, so
just use the dentry directly instead, making it a static variable
instead of part of a static structure.
This also removes the pointless BUG_ON() when checking that dentry as no
one should ever care if debugfs is working or not, and the kernel should
really not panic over something as trivial as that.
Suggested-by: Eric Anholt <eric@anholt.net>
Cc: Stefan Wahren <stefan.wahren@i2se.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Keerthi Reddy <keerthigd4990@gmail.com>
Cc: linux-rpi-kernel@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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When calling debugfs functions, there is no need to ever check the
return value. The function can work or not, but the code logic should
never do something different based on this.
Clean up the vchiq_arm code by not caring about the value of debugfs
calls. This ends up removing a number of lines of code that are not
needed.
Cc: Stefan Wahren <stefan.wahren@i2se.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Keerthi Reddy <keerthigd4990@gmail.com>
Cc: linux-rpi-kernel@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This patch fixes the checkpatch.pl check hint:
CHECK: Prefer using the BIT_ULL macro
Signed-off-by: Kilian Köppchen <kiliankoeppchen@googlemail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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We just need some integer handles that can map back to our message
struct when we're handling a reply, which struct idr is perfect for.
v2: Fix error check to look at the right variable.
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Noticed by Stephen Rothwell in -next.
Signed-off-by: Eric Anholt <eric@anholt.net>
Fixes: 4bebb0312ea9 ("staging/bcm2835-camera: Set ourselves up as a platform driver.")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The arg is a u32 *, so switch over to that in our declarations.
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Fixes a compiler warning about a set-but-not-used variable. I think
this was just leftover dead code from before set_framerate_params(),
since that also sets up some mmal_parameter_rational structs for fps.
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The v4l2 uapi uses u8[] for strings, so cast those to char * to avoid
compiler warnings about unsigned vs signed with sprintf() and friends.
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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As requested by Mauro Carvalho Chehab in review.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Fix a typo flagged by checkpatch, and another in the same line.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The error conditions don't warrant taking the kernel down, so remove
BUG_ON.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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struct vchiq_mmal_rect is only referenced from mmal-parameters.h, yet
was defined in mmal-vchiq.h.
Move it to avoid having to include multiple headers for no reason.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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mmal-parameters.h didn't have the normal
...
protection to stop it being included multiple times. Add it.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The MMAL and V4L2 buffers had been disassociated, and linked on
demand. Seeing as both are finite and low in number, and we now have
the same number of each, link them for the duration. This removes the
complexity of maintaining lists as the struct mmal_buffer context
comes back from the VPU, so we can directly link back to the relevant
V4L2 buffer.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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For historical reasons, the number of buffers passed to the VPU over
MMAL did not match that passed from V4L2. That is a silly situation
as the driver has to duplicate serialisation and other functions that
have already been implemented in V4L2/videobuf2.
As we had more V4L2 buffers than MMAL ones, the MMAL buffer headers
were returned to the VPU immediately on being filled, which is now
invalid.
Match the number of buffers notified in queue_setup with that used in
MMAL. Return buffers only when we get them from V4L2.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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There is no requirement to serialise bulk transfers as that is all
done in VCHI, and if a second MMAL_MSG_TYPE_BUFFER_TO_HOST happened
before the VCHI_CALLBACK_BULK_RECEIVED, then the service_callback
thread is deadlocked.
Remove the bulk_mutex so that multiple receives can be scheduled at a
time.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The struct mmal_msg_context was being allocated for every message
being sent to the VPU, and freed when it came back. Whilst that is
required behaviour for some messages (mainly the synchronous ones), it
is wasteful for the video buffers that make up the majority of the
traffic.
Add to the buffer_init/cleanup hooks that it allocates/frees the
msg_context required.
v2: changes by anholt from the downstream tree: clean up indentation,
pass an error value through, forward-declare the struct so we have
less void *
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Interleaved RGB and single plane YUV formats can be delivered by the
GPU without the secondary step of removing padding, as the
bytesperline field can be set appropriately.
Planar YUV needs the GPU to still remove padding, as there is no way
to report that there is padding between the planes (ie on the height).
The multi-planar formats are NOT applicable, as there is no easy way
to make them contiguous in memory (ie one large allocation that gets
broken up). The whole task is passed across to videobuf2 which has no
notion of that requirement.
v2: Changes by anholt from the downstream driver: Flag two more planar
formats as needing padding removal, and remove broken userspace
workaround.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This allows bcm2835-camera to automatically probe after VCHI has
loaded, rather than only successfully probing if the arbitrary probe
order chooses us after VCHI.
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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We had the camera driver set up in a module_init function, but that
meant that the camera driver would fail to load if it was initialized
before VCHI. By attaching to this platform_device, it can get a
defined load order.
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Since there is no vchiq function listed by "make checkstack" anymore,
we can remove the stack hog issue from the TODO.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This removes an unnecessary break which has been reported by checkpatch.pl.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This removing an unnecessary return which has been reported by checkpatch.pl.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This fixes a whitespace issue reported by checkpatch:
ERROR: code indent should use tabs where possible
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The definition of USE_VCHIQ_ARM and VCOS_VERIFY_BKPTS isn't really necessary
so remove them.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The chance to mixup i and j is very high. So rename variable j to a more
explaining one.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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In order to make the code easier to review, move the second
abort criterion into the loop and the incrementation into
a separate line.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The kernel would like to have all stack VLA usage removed[1]. The array
here is fixed (declared with a const variable) but it appears like a VLA
to the compiler. Also, currently we are putting 768 bytes on the
stack. This function is only called on the error path so performance is
not critical, let's just allocate the memory instead of using the
stack. This saves stack space and removes the VLA build warning.
kmalloc a buffer for dumping state instead of using the stack.
[1]: https://lkml.org/lkml/2018/3/7/621
Signed-off-by: Tobin C. Harding <me@tobin.cc>
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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We better use the real loop limit in the warning about
"too many active services". Another benefit is than we don't have to care
about the format string in the following change.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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In the current implementation, vchi_instance is inited during the first
call of bcm2835_audio_open_connection(), and is never freed. It causes a
memory leak when the module `snd_bcm2835` is removed.
Here is how this commit fixes it:
* the VCHI context (including vchi_instance) is created once in the
platform's devres
* the VCHI context is allocated and connected once during module_init()
* all created bcm2835_chips have a pointer to this VCHI context
* bcm2835_audio_open_connection() can access the VCHI context through the
associated bcm2835_chip
* the VCHI context is disconnected and freed once during module_exit()
After this commit is applied, I don't see other issues with the module's
init/exit, so I also remove the associated TODO task.
Steps to reproduce the memory leak before this commit:
~~~~
root@raspberrypi:/home/pi# aplay test0.wav
Playing WAVE 'test0.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Ster
^CAborted by signal Interrupt...
root@raspberrypi:/home/pi# rmmod snd_bcm2835
root@raspberrypi:/home/pi# modprobe snd_bcm2835
root@raspberrypi:/home/pi# aplay test0.wav
Playing WAVE 'test0.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Ster
^CAborted by signal Interrupt...
root@raspberrypi:/home/pi# echo scan > /sys/kernel/debug/kmemleak
root@raspberrypi:/home/pi# cat /sys/kernel/debug/kmemleak
unreferenced object 0xb6794c00 (size 128):
comm "aplay", pid 406, jiffies 36870 (age 116.650s)
hex dump (first 32 bytes):
08 a5 82 81 01 00 00 00 08 4c 79 b6 08 4c 79 b6 .........Ly..Ly.
00 00 00 00 00 00 00 00 ad 4e ad de ff ff ff ff .........N......
backtrace:
[<802af5e0>] kmem_cache_alloc_trace+0x294/0x3d0
[<806ce620>] vchiq_initialise+0x98/0x1b0
[<806d0b34>] vchi_initialise+0x24/0x34
[<7f1311ec>] 0x7f1311ec
[<7f1303bc>] 0x7f1303bc
[<7f130590>] 0x7f130590
[<7f111fd8>] snd_pcm_open_substream+0x68/0xc4 [snd_pcm]
[<7f112108>] snd_pcm_open+0xd4/0x248 [snd_pcm]
[<7f112334>] snd_pcm_playback_open+0x4c/0x6c [snd_pcm]
[<7f0e250c>] snd_open+0xa8/0x14c [snd]
[<802ce590>] chrdev_open+0xac/0x188
[<802c57b4>] do_dentry_open+0x10c/0x314
[<802c6ba8>] vfs_open+0x5c/0x88
[<802d9a68>] path_openat+0x368/0x944
[<802dacd4>] do_filp_open+0x70/0xc4
[<802c6f70>] do_sys_open+0x110/0x1d4
~~~~
Signed-off-by: Kirill Marinushkin <k.marinushkin@gmail.com>
Cc: Eric Anholt <eric@anholt.net>
Cc: Stefan Wahren <stefan.wahren@i2se.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Ray Jui <rjui@broadcom.com>
Cc: Scott Branden <sbranden@broadcom.com>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: bcm-kernel-feedback-list@broadcom.com
Cc: linux-rpi-kernel@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: devel@driverdev.osuosl.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
In most cases this other symbol is an architecture or platform specific
symbol, or PCI.
Generic symbols and drivers without platform dependencies keep their
dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
cannot work anyway.
This simplifies the dependencies, and allows to improve compile-testing.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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We need to free the kthreads in error case before leaving
vchiq_init_state() otherwise we leak resources.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Move all calls of wake_up_process to one point, whichs makes the
following implementation of clean-up code easier.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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vchiq_initialise() is used in non-interrupt context, so we can
replace udelay with usleep_range as suggested by timers-howto.txt.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Multiline dereferences aren't nice to review. So fix this checkpatch
warning.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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It's better to use the __func__ macro instead of open-code the function
name. This fixes the following checkpatch warning:
WARNING: Prefer using '"%s...", __func__' to using 'x',
this function's name, in a string
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Hiding memset behind a macro isn't the best, because it relies on that
the parameter is not a pointer. Luckily all user has been removed, so
we can remove BITSET_ZERO too.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This removes the stackhog in process_free_queue by allocating the
necessary memory within the recycle thread main function instead
of the stack.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Ben Wolsieffer
Linus Torvalds
Nicholas Mc Guire
Tuomas Tynkkynen
Ezequiel Garcia
Colin Ian King
Greg Kroah-Hartman
Kilian Köppchen
Eric Anholt
Dave Stevenson
Dave Stevenson
Stefan Wahren
Kirill Marinushkin
Geert Uytterhoeven