media: ipu6: Ensure stream_mutex is acquired when dealing with node list

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[ Upstream commit 779bdaad2a ]

The ipu6 isys driver maintains the list of video buffer queues related to
a stream (in ipu6 context streams on the same CSI-2 virtual channel) and
this list is modified through VIDIOC_STREAMON and VIDIOC_STREAMOFF IOCTLs.
Ensure the common mutex is acquired when accessing the linked list, i.e.
the isys device context's stream_mutex.

Add a lockdep assert to ipu6_isys_get_buffer_list() and switch to guard()
while at it as the error handling becomes more simple this way.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Sakari Ailus 2025-11-27 14:14:22 +02:00 • committed by Sasha Levin

parent e913d0d8e2

commit 5d5190cbc4

1 changed files with 5 additions and 3 deletions

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drivers/media/pci/intel/ipu6/ipu6-isys-queue.c

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