media: entity: Add lockdep check to media graph walk

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It was always assumed that walking the media graph would require holding
the media_device graph_mutex but this was not documented nor checked for.

Add a lockdep check to graph walk init and iter, and document the need for
acquiring the graph_mutex.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

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Sakari Ailus 2021-03-12 10:05:44 +01:00 • committed by Mauro Carvalho Chehab

parent 5bf2c8b66e

commit 4ebddb7c17

2 changed files with 6 additions and 0 deletions

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include/media/media-entity.h

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