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Sakari Ailus 4ad09285f7 media: v4l2-ctrls: Don't reset handler's error in v4l2_ctrl_handler_free() 
[ Upstream commit 5a0400aca5 ]

It's a common pattern in drivers to free the control handler's resources
and then return the handler's error code on drivers' error handling paths.
Alas, the v4l2_ctrl_handler_free() function also zeroes the error field,
effectively indicating successful return to the caller.

There's no apparent need to touch the error field while releasing the
control handler's resources and cleaning up stale pointers. Not touching
the handler's error field is a more certain way to address this problem
than changing all the users, in which case the pattern would be likely to
re-emerge in new drivers.

Do just that, don't touch the control handler's error field in
v4l2_ctrl_handler_free().

Fixes: 0996517cf8 ("V4L/DVB: v4l2: Add new control handling framework")
Cc: stable@vger.kernel.org
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Hans Verkuil <hverkuil@xs4all.nl>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
[ v4l2-ctrls.c => v4l2-ctrls-core.c ]
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2025-08-28 16:22:57 +02:00
arch mm/ptdump: take the memory hotplug lock inside ptdump_walk_pgd() 2025-08-28 16:22:55 +02:00
block block: don't call rq_qos_ops->done_bio if the bio isn't tracked 2025-08-28 16:22:54 +02:00
certs
crypto crypto: xts - Only add ecb if it is not already there 2025-06-27 11:04:01 +01:00
Documentation asm-generic: Add memory barrier dma_mb() 2025-08-28 16:22:57 +02:00
drivers media: v4l2-ctrls: Don't reset handler's error in v4l2_ctrl_handler_free() 2025-08-28 16:22:57 +02:00
fs ext4: fix hole length calculation overflow in non-extent inodes 2025-08-28 16:22:56 +02:00
include asm-generic: Add memory barrier dma_mb() 2025-08-28 16:22:57 +02:00
init bpf: Clean up sockmap related Kconfigs 2025-06-27 11:04:09 +01:00
io_uring io_uring: fix possible deadlock in io_register_iowq_max_workers() 2024-11-17 14:59:39 +01:00
ipc ipc: fix to protect IPCS lookups using RCU 2025-06-27 11:04:14 +01:00
kernel mm: drop the assumption that VM_SHARED always implies writable 2025-08-28 16:22:54 +02:00
lib lib: test_objagg: Set error message in check_expect_hints_stats() 2025-07-17 18:27:47 +02:00
LICENSES
mm mm/ptdump: take the memory hotplug lock inside ptdump_walk_pgd() 2025-08-28 16:22:55 +02:00
net net/sched: ets: use old 'nbands' while purging unused classes 2025-08-28 16:22:55 +02:00
samples samples: mei: Fix building on musl libc 2025-08-28 16:22:32 +02:00
scripts kconfig: lxdialog: fix 'space' to (de)select options 2025-08-28 16:22:47 +02:00
security securityfs: don't pin dentries twice, once is enough... 2025-08-28 16:22:40 +02:00
sound ALSA: scarlett2: Add retry on -EPROTO from scarlett2_usb_tx() 2025-08-28 16:22:53 +02:00
tools selftests/memfd: add test for mapping write-sealed memfd read-only 2025-08-28 16:22:55 +02:00
usr kbuild: hdrcheck: fix cross build with clang 2025-06-27 11:04:11 +01:00
virt KVM: Fix a data race on last_boosted_vcpu in kvm_vcpu_on_spin() 2024-10-22 15:39:24 +02:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore Remove *.orig pattern from .gitignore 2024-10-17 15:07:59 +02:00
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS platform: Add Surface platform directory 2025-06-27 11:04:19 +01:00
Makefile kbuild: userprogs: use correct linker when mixing clang and GNU ld 2025-08-28 16:22:52 +02:00
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README

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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.