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Filename Latest commit message Latest commit date
Alexandre Courbot 28276c280f media: v4l2-mem2mem: always consider OUTPUT queue during poll 
commit 566463afdbc43c7744c5a1b89250fc808df03833 upstream.

If poll() is called on a m2m device with the EPOLLOUT event after the
last buffer of the CAPTURE queue is dequeued, any buffer available on
OUTPUT queue will never be signaled because v4l2_m2m_poll_for_data()
starts by checking whether dst_q->last_buffer_dequeued is set and
returns EPOLLIN in this case, without looking at the state of the OUTPUT
queue.

Fix this by not early returning so we keep checking the state of the
OUTPUT queue afterwards.

Signed-off-by: Alexandre Courbot <gnurou@gmail.com>
Reviewed-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Cc: Lecopzer Chen <lecopzer.chen@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-08-15 13:08:02 +02:00
arch KVM: SVM: Fix off-by-one indexing when nullifying last used SEV VMCB 2021-08-15 13:08:02 +02:00
block blk-iolatency: error out if blk_get_queue() failed in iolatency_set_limit() 2021-08-12 13:20:58 +02:00
certs
crypto
Documentation userfaultfd: do not untag user pointers 2021-07-28 13:31:01 +02:00
drivers media: v4l2-mem2mem: always consider OUTPUT queue during poll 2021-08-15 13:08:02 +02:00
fs reiserfs: check directory items on read from disk 2021-08-12 13:21:05 +02:00
include tee: Correct inappropriate usage of TEE_SHM_DMA_BUF flag 2021-08-15 13:08:02 +02:00
init
ipc
kernel timers: Move clearing of base::timer_running under base:: Lock 2021-08-12 13:21:03 +02:00
lib
LICENSES
mm
net Bluetooth: defer cleanup of resources in hci_unregister_dev() 2021-08-12 13:20:58 +02:00
samples
scripts scripts/tracing: fix the bug that can't parse raw_trace_func 2021-08-12 13:21:00 +02:00
security
sound ALSA: usb-audio: Add registration quirk for JBL Quantum 600 2021-08-12 13:20:59 +02:00
tools bpf, selftests: Adjust few selftest result_unpriv outcomes 2021-08-12 13:21:04 +02:00
usr
virt KVM: Do not leak memory for duplicate debugfs directories 2021-08-12 13:21:03 +02:00
.clang-format
.cocciconfig
.get_maintainer.ignore
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Makefile Linux 5.4.140 2021-08-12 13:21:05 +02:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.