linux

mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-11-08 18:57:22 +00:00

No description

C 96.8%
Assembly 0.9%
Rust 0.7%
Shell 0.6%
Python 0.5%
Other 0.3%

Find a file

Guoniu Zhou b0d438c7b4 media: nxp: imx8-isi: m2m: Fix streaming cleanup on release [ Upstream commit `178aa33602` ] If streamon/streamoff calls are imbalanced, such as when exiting an application with Ctrl+C when streaming, the m2m usage_count will never reach zero and the ISI channel won't be freed. Besides from that, if the input line width is more than 2K, it will trigger a WARN_ON(): [ 59.222120] ------------[ cut here ]------------ [ 59.226758] WARNING: drivers/media/platform/nxp/imx8-isi/imx8-isi-hw.c:631 at mxc_isi_channel_chain+0xa4/0x120, CPU#4: v4l2-ctl/654 [ 59.238569] Modules linked in: ap1302 [ 59.242231] CPU: 4 UID: 0 PID: 654 Comm: v4l2-ctl Not tainted 6.16.0-rc4-next-20250704-06511-gff0e002d480a-dirty #258 PREEMPT [ 59.253597] Hardware name: NXP i.MX95 15X15 board (DT) [ 59.258720] pstate: 80400009 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 59.265669] pc : mxc_isi_channel_chain+0xa4/0x120 [ 59.270358] lr : mxc_isi_channel_chain+0x44/0x120 [ 59.275047] sp : ffff8000848c3b40 [ 59.278348] x29: ffff8000848c3b40 x28: ffff0000859b4c98 x27: ffff800081939f00 [ 59.285472] x26: 000000000000000a x25: ffff0000859b4cb8 x24: 0000000000000001 [ 59.292597] x23: ffff0000816f4760 x22: ffff0000816f4258 x21: ffff000084ceb780 [ 59.299720] x20: ffff000084342ff8 x19: ffff000084340000 x18: 0000000000000000 [ 59.306845] x17: 0000000000000000 x16: 0000000000000000 x15: 0000ffffdb369e1c [ 59.313969] x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000 [ 59.321093] x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000 [ 59.328217] x8 : ffff8000848c3d48 x7 : ffff800081930b30 x6 : ffff800081930b30 [ 59.335340] x5 : ffff0000859b6000 x4 : ffff80008193ae80 x3 : ffff800081022420 [ 59.342464] x2 : ffff0000852f6900 x1 : 0000000000000001 x0 : ffff000084341000 [ 59.349590] Call trace: [ 59.352025] mxc_isi_channel_chain+0xa4/0x120 (P) [ 59.356722] mxc_isi_m2m_streamon+0x160/0x20c [ 59.361072] v4l_streamon+0x24/0x30 [ 59.364556] __video_do_ioctl+0x40c/0x4a0 [ 59.368560] video_usercopy+0x2bc/0x690 [ 59.372382] video_ioctl2+0x18/0x24 [ 59.375857] v4l2_ioctl+0x40/0x60 [ 59.379168] __arm64_sys_ioctl+0xac/0x104 [ 59.383172] invoke_syscall+0x48/0x104 [ 59.386916] el0_svc_common.constprop.0+0xc0/0xe0 [ 59.391613] do_el0_svc+0x1c/0x28 [ 59.394915] el0_svc+0x34/0xf4 [ 59.397966] el0t_64_sync_handler+0xa0/0xe4 [ 59.402143] el0t_64_sync+0x198/0x19c [ 59.405801] ---[ end trace 0000000000000000 ]--- Address this issue by moving the streaming preparation and cleanup to the vb2 .prepare_streaming() and .unprepare_streaming() operations. This also simplifies the driver by allowing direct usage of the v4l2_m2m_ioctl_streamon() and v4l2_m2m_ioctl_streamoff() helpers. Fixes: `cf21f328fc` ("media: nxp: Add i.MX8 ISI driver") Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20250821135123.29462-1-laurent.pinchart@ideasonboard.com Signed-off-by: Guoniu Zhou <guoniu.zhou@nxp.com> Co-developed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Tested-by: Guoniu Zhou <guoniu.zhou@nxp.com> Reviewed-by: Frank Li <Frank.Li@nxp.com> Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org> [ added bypass parameter to mxc_isi_channel_chain() call ] Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		History 2025-10-23 16:24:26 +02:00
arch	KVM: arm64: Prevent access to vCPU events before init	2025-10-23 16:24:22 +02:00
block	blk-crypto: fix missing blktrace bio split events	2025-10-19 16:37:23 +02:00
certs	sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3	2024-09-20 19:52:48 +03:00
crypto	crypto: essiv - Check ssize for decryption and in-place encryption	2025-10-19 16:37:14 +02:00
Documentation	docs: kdoc: handle the obsolescensce of docutils.ErrorString()	2025-10-23 16:24:19 +02:00
drivers	media: nxp: imx8-isi: m2m: Fix streaming cleanup on release	2025-10-23 16:24:26 +02:00
fs	cifs: parse_dfs_referrals: prevent oob on malformed input	2025-10-23 16:24:24 +02:00
include	PM: hibernate: Add pm_hibernation_mode_is_suspend()	2025-10-23 16:24:26 +02:00
init	init: handle bootloader identifier in kernel parameters	2025-10-19 16:37:27 +02:00
io_uring	io_uring: protect mem region deregistration	2025-10-23 16:24:22 +02:00
ipc	vfs-6.17-rc1.mmap_prepare	2025-07-28 13:43:25 -07:00
kernel	PM: hibernate: Add pm_hibernation_mode_is_suspend()	2025-10-23 16:24:26 +02:00
lib	lib/genalloc: fix device leak in of_gen_pool_get()	2025-10-19 16:37:28 +02:00
LICENSES	LICENSES: Replace the obsolete address of the FSF in the GFDL-1.2	2025-07-24 11:15:39 +02:00
mm	slab: reset slab->obj_ext when freeing and it is OBJEXTS_ALLOC_FAIL	2025-10-23 16:24:21 +02:00
net	mptcp: reset blackhole on success with non-loopback ifaces	2025-10-19 16:37:36 +02:00
rust	cpufreq: Make drivers using CPUFREQ_ETERNAL specify transition latency	2025-10-19 16:37:00 +02:00
samples	15 hotfixes. 11 are cc:stable and the remainder address post-6.16 issues	2025-09-17 21:34:26 -07:00
scripts	kbuild: Add '.rel.*' strip pattern for vmlinux	2025-10-19 16:37:15 +02:00
security	KEYS: trusted_tpm1: Compare HMAC values in constant time	2025-10-19 16:37:28 +02:00
sound	ALSA: hda: Fix missing pointer check in hda_component_manager_init function	2025-10-23 16:24:25 +02:00
tools	selftests: mptcp: join: validate C-flag + def limit	2025-10-19 16:37:36 +02:00
usr	usr/include: openrisc: don't HDRTEST bpf_perf_event.h	2025-05-12 15:03:17 +09:00
virt	Merge tag 'kvm-x86-no_assignment-6.17' of https://github.com/kvm-x86/linux into HEAD	2025-07-29 08:36:42 -04:00
.clang-format	Linux 6.15-rc5	2025-05-06 16:39:25 +10:00
.clippy.toml	rust: clean Rust 1.88.0's warning about `clippy::disallowed_macros` configuration	2025-05-07 00:11:47 +02:00
.cocciconfig	scripts: add Linux .cocciconfig for coccinelle	2016-07-22 12:13:39 +02:00
.editorconfig	.editorconfig: remove trim_trailing_whitespace option	2024-06-13 16:47:52 +02:00
.get_maintainer.ignore	MAINTAINERS: remove Alyssa Rosenzweig	2025-09-18 21:17:31 +02:00
.gitattributes	.gitattributes: set diff driver for Rust source code files	2023-05-31 17:48:25 +02:00
.gitignore	gitignore: allow .pylintrc to be tracked	2025-07-02 17:10:04 -06:00
.mailmap	7 hotfixes. 4 are cc:stable and the remainder address post-6.16 issues or	2025-09-28 09:32:00 -07:00
.pylintrc	docs: add a .pylintrc file with sys path for docs scripts	2025-04-09 12:10:33 -06:00
.rustfmt.toml	rust: add `.rustfmt.toml`	2022-09-28 09:02:20 +02:00
COPYING	COPYING: state that all contributions really are covered by this file	2020-02-10 13:32:20 -08:00
CREDITS	MAINTAINERS: retire Boris from TLS maintainers	2025-08-26 17:36:01 -07:00
Kbuild	drm: ensure drm headers are self-contained and pass kernel-doc	2025-02-12 10:44:43 +02:00
Kconfig	io_uring: Rename KConfig to Kconfig	2025-02-19 14:53:27 -07:00
MAINTAINERS	i2c-for-6.17-rc8	2025-09-28 13:19:23 -07:00
Makefile	Linux 6.17.4	2025-10-19 16:37:45 +02:00
README	README: Fix spelling	2024-03-18 03:36:32 -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 reStructuredText 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.