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461733d83e
[ Upstream commit 7345d6d356 ]
Once an async connection is found to be matching with an fwnode, a
sub-device may be registered (in case it wasn't already), its bound
operation is called, ancillary links are created, the async connection
is added to the sub-device's list of connections and removed from the
global waiting connection list. Further on, the sub-device's possible own
notifier is searched for possible additional matches.
Fix these specific issues:
- If v4l2_async_match_notify() failed before the sub-notifier handling,
the async connection was unbound and its entry removed from the
sub-device's async connection list. The latter part was also done in
v4l2_async_match_notify().
- The async connection's sd field was only set after creating ancillary
links in v4l2_async_match_notify(). It was however dereferenced in
v4l2_async_unbind_subdev_one(), which was called on error path of
v4l2_async_match_notify() failure.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Tested-by: "Yew, Chang Ching" <chang.ching.yew@intel.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>