media: v4l: async: Remove re-probing support
authorSakari Ailus <sakari.ailus@linux.intel.com>
Tue, 5 Sep 2017 12:11:59 +0000 (08:11 -0400)
committerMauro Carvalho Chehab <mchehab@s-opensource.com>
Tue, 31 Oct 2017 16:11:01 +0000 (12:11 -0400)
commitde8dd7b2afc3108a0dddd70f0fd897ab89e141ed
tree59f8a15bde4ab90da5849d89e433fade245aa1f2
parentf283c01b8094da9454f4b51c997f578227c29d95
media: v4l: async: Remove re-probing support

Remove V4L2 async re-probing support. The re-probing support has been
there to support cases where the sub-devices require resources provided by
the main driver's hardware to function, such as clocks.

Reprobing has allowed unbinding and again binding the main driver without
explicitly unbinding the sub-device drivers. This is certainly not a
common need, and the responsibility will be the user's going forward.

An alternative could have been to introduce notifier specific locks.
Considering the complexity of the re-probing and that it isn't really a
solution to a problem but a workaround, remove re-probing instead.

If there is a need to support the clock provider unregister/register cycle
while keeping the clock references in the consumers in the future, this
should be implemented in the clock framework instead, not in V4L2.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Acked-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
drivers/media/v4l2-core/v4l2-async.c