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4754e8234e
[ Upstream commit cf6acb73b050e98b5cc435fae0e8ae0157520410 ] v4l2-compliance fails with this message: fail: v4l2-test-buffers.cpp(691): ret == 0 fail: v4l2-test-buffers.cpp(974): captureBufs(node, q, m2m_q, frame_count, true) test MMAP: FAIL This caused the following Kernel Warning: WARNING: CPU: 0 PID: 961 at drivers/media/v4l2-core/videobuf2-core.c:1658 __vb2_queue_cancel+0x174/0x1d8 ... CPU: 0 PID: 961 Comm: v4l2-compliance Not tainted 4.14.62-01720-g20ecd717e87a #6 Hardware name: Generic DRA72X (Flattened Device Tree) Backtrace: [<c020b5bc>] (dump_backtrace) from [<c020b8a0>] (show_stack+0x18/0x1c) r7:00000009 r6:60070013 r5:00000000 r4:c1053824 [<c020b888>] (show_stack) from [<c09232e8>] (dump_stack+0x90/0xa4) [<c0923258>] (dump_stack) from [<c022b740>] (__warn+0xec/0x104) r7:00000009 r6:c0c0ad50 r5:00000000 r4:00000000 [<c022b654>] (__warn) from [<c022b810>] (warn_slowpath_null+0x28/0x30) r9:00000008 r8:00000000 r7:eced4808 r6:edbc9bac r5:eced4844 r4:eced4808 [<c022b7e8>] (warn_slowpath_null) from [<c0726f48>] (__vb2_queue_cancel+0x174/0x1d8) [<c0726dd4>] (__vb2_queue_cancel) from [<c0727648>] (vb2_core_queue_release+0x20/0x40) r10:ecc7bd70 r9:00000008 r8:00000000 r7:edb73010 r6:edbc9bac r5:eced4844 r4:eced4808 r3:00000004 [<c0727628>] (vb2_core_queue_release) from [<c0729528>] (vb2_queue_release+0x10/0x14) r5:edbc9810 r4:eced4800 [<c0729518>] (vb2_queue_release) from [<c0724d08>] (v4l2_m2m_ctx_release+0x1c/0x30) [<c0724cec>] (v4l2_m2m_ctx_release) from [<bf0e8f28>] (vpe_release+0x74/0xb0 [ti_vpe]) r5:edbc9810 r4:ed67a400 [<bf0e8eb4>] (vpe_release [ti_vpe]) from [<c070fccc>] (v4l2_release+0x3c/0x80) r7:edb73010 r6:ed176aa0 r5:edbc9868 r4:ed5119c0 [<c070fc90>] (v4l2_release) from [<c033cf1c>] (__fput+0x8c/0x1dc) r5:ecc7bd70 r4:ed5119c0 [<c033ce90>] (__fput) from [<c033d0cc>] (____fput+0x10/0x14) r10:00000000 r9:ed5119c0 r8:ece392d0 r7:c1059544 r6:ece38d80 r5:ece392b4 r4:00000000 [<c033d0bc>] (____fput) from [<c0246e00>] (task_work_run+0x98/0xb8) [<c0246d68>] (task_work_run) from [<c022f1d8>] (do_exit+0x170/0xa80) r9:ece351fc r8:00000000 r7:ecde3f58 r6:ffffe000 r5:ece351c0 r4:ece38d80 [<c022f068>] (do_exit) from [<c022fb6c>] (do_group_exit+0x48/0xc4) r7:000000f8 [<c022fb24>] (do_group_exit) from [<c022fc00>] (__wake_up_parent+0x0/0x28) r7:000000f8 r6:b6c6a798 r5:00000001 r4:00000001 [<c022fbe8>] (SyS_exit_group) from [<c0207c80>] (ret_fast_syscall+0x0/0x4c) These warnings are caused by buffers which not properly cleaned up/release during an abort use case. In the abort cases the VPDMA desc buffers would still be mapped and the in-flight VB2 buffers would not be released properly causing a kernel warning from being generated by the videobuf2-core level. Signed-off-by: Benoit Parrot <bparrot@ti.com> Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> |
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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.