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media: v4l: async: Fix duplicated list deletion

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[ Upstream commit 3de6ee94aae701fa949cd3b5df6b6a440ddfb8f2 ]

The list deletion call dropped here is already called from the
helper function in the line before. Having a second list_del()
call results in either a warning (with CONFIG_DEBUG_LIST=y):

list_del corruption, c46c8198->next is LIST_POISON1 (00000100)

If CONFIG_DEBUG_LIST is disabled the operation results in a
kernel error due to NULL pointer dereference.

Fixes: 28a1295795 ("media: v4l: async: Allow multiple connections between entities")
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sebastian Reichel
2023-11-13 23:57:23 +01:00
committed by Greg Kroah-Hartman
parent af9d39677c
commit b7062628ca
1 changed files with 0 additions and 1 deletions
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drivers/media/v4l2-core/v4l2-async.c
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@@ -880,7 +880,6 @@ void v4l2_async_unregister_subdev(struct v4l2_subdev *sd)
&asc->notifier->waiting_list);
v4l2_async_unbind_subdev_one(asc->notifier, asc);
list_del(&asc->asc_subdev_entry);
}
}