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Ming Qian db01d107c2 media: v4l2-mem2mem: prevent pollerr when last_buffer_dequeued is set 
[ Upstream commit d4de27a9b1 ]

If the last buffer was dequeued from the capture queue,
signal userspace. DQBUF(CAPTURE) will return -EPIPE.

But if output queue is empty and capture queue is empty,
v4l2_m2m_poll_for_data will return EPOLLERR,
This is very easy to happen in drain.

When last_buffer_dequeued is set, we shouldn't return EPOLLERR,
but return EPOLLIN | EPOLLRDNORM.

Fixes: 1698a7f151 ("media: v4l2-mem2mem: simplify poll logic")
Signed-off-by: Ming Qian <ming.qian@nxp.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-08-17 14:23:23 +02:00
arch
x86/extable: Fix ex_handler_msr() print condition
2022-08-17 14:23:14 +02:00
block
blk-mq: don't create hctx debugfs dir until q->debugfs_dir is created
2022-08-17 14:23:12 +02:00
certs
certs/blacklist_hashes.c: fix const confusion in certs blacklist
2022-06-22 14:22:01 +02:00
crypto
crypto: memneq - move into lib/
2022-06-22 14:22:03 +02:00
Documentation
dm writecache: count number of blocks discarded, not number of discard bios
2022-08-17 14:23:13 +02:00
drivers
media: v4l2-mem2mem: prevent pollerr when last_buffer_dequeued is set
2022-08-17 14:23:23 +02:00
fs
erofs: avoid consecutive detection for Highmem memory
2022-08-17 14:23:12 +02:00
include
rcutorture: Warn on individual rcu_torture_init() error conditions
2022-08-17 14:23:22 +02:00
init
stack: Declare {randomize_,}kstack_offset to fix Sparse warnings
2022-08-17 14:23:10 +02:00
ipc
ipc/mqueue: use get_tree_nodev() in mqueue_get_tree()
2022-06-09 10:23:10 +02:00
kernel
rcutorture: Fix ksoftirqd boosting timing and iteration
2022-08-17 14:23:23 +02:00
lib
test_bpf: fix incorrect netdev features
2022-08-17 14:23:23 +02:00
LICENSES
LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes"
2021-07-15 06:31:24 -06:00
mm
page_alloc: fix invalid watermark check on a negative value
2022-08-03 12:03:55 +02:00
net
netfilter: nf_tables: fix null deref due to zeroed list head
2022-08-17 14:22:59 +02:00
samples
samples/landlock: Format with clang-format
2022-06-09 10:23:23 +02:00
scripts
x86/extable: Rework the exception table mechanics
2022-07-29 17:25:25 +02:00
security
selinux: Add boundary check in put_entry()
2022-08-17 14:23:05 +02:00
sound
ALSA: hda/realtek: Add a quirk for HP OMEN 15 (8786) mute LED
2022-08-17 14:22:50 +02:00
tools
thermal/tools/tmon: Include pthread and time headers in tmon.h
2022-08-17 14:23:15 +02:00
usr
usr/include/Makefile: add linux/nfc.h to the compile-test coverage
2022-02-01 17:27:15 +01:00
virt
KVM: Don't null dereference ops->destroy
2022-07-29 17:25:24 +02:00
.clang-format
clang-format: Update with the latest for_each macro list
2021-05-12 23:32:39 +02:00
.cocciconfig
…
.get_maintainer.ignore
Opt out of scripts/get_maintainer.pl
2019-05-16 10:53:40 -07:00
.gitattributes
.gitattributes: use 'dts' diff driver for dts files
2019-12-04 19:44:11 -08:00
.gitignore
.gitignore: ignore only top-level modules.builtin
2021-05-02 00:43:35 +09:00
.mailmap
mailmap: add Andrej Shadura
2021-10-18 20:22:03 -10:00
COPYING
COPYING: state that all contributions really are covered by this file
2020-02-10 13:32:20 -08:00
CREDITS
MAINTAINERS: Move Daniel Drake to credits
2021-09-21 08:34:58 +03:00
Kbuild
kbuild: rename hostprogs-y/always to hostprogs/always-y
2020-02-04 01:53:07 +09:00
Kconfig
kbuild: ensure full rebuild when the compiler is updated
2020-05-12 13:28:33 +09:00
MAINTAINERS
Input: goodix - add a goodix.h header file
2022-07-12 16:34:51 +02:00
Makefile
Makefile: link with -z noexecstack --no-warn-rwx-segments
2022-08-17 14:22:44 +02:00
README
Drop all 00-INDEX files from Documentation/
2018-09-09 15:08:58 -06:00

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.
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