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| author | Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> | 2019-01-04 19:12:18 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-01-16 19:32:52 +0300 |
| commit | 6458afc8c49148f0a5015d8853039a0b3fb91d98 (patch) | |
| tree | 32c589b243d5cbd19b6409bd23448c680a68aba3 /drivers/media/platform/rcar-vin | |
| parent | a86f2b590aa0259b961ffc39852e7c88f6c7e468 (diff) | |
| download | linux-6458afc8c49148f0a5015d8853039a0b3fb91d98.tar.xz | |
media: rcar-vin: remove unneeded locking in async callbacks
The locking implemented in the async notifier callbacks are unnecessary
as the global list_lock in v4l2-async.c is held whenever one of the
callbacks are called.
The locking in itself is not harmful however it produces a LOCKDEP
warning between the global v4l2-async list_lock and the rcar-vin local
locking schema. Remove the rcar-vin locking for the async callbacks to
reduce complexity and silent the false LOCKDEP warning.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'drivers/media/platform/rcar-vin')
| -rw-r--r-- | drivers/media/platform/rcar-vin/rcar-core.c | 14 |
1 files changed, 0 insertions, 14 deletions
diff --git a/drivers/media/platform/rcar-vin/rcar-core.c b/drivers/media/platform/rcar-vin/rcar-core.c index f0719ce24b97..0e81b557f3b6 100644 --- a/drivers/media/platform/rcar-vin/rcar-core.c +++ b/drivers/media/platform/rcar-vin/rcar-core.c @@ -542,9 +542,7 @@ static void rvin_parallel_notify_unbind(struct v4l2_async_notifier *notifier, vin_dbg(vin, "unbind parallel subdev %s\n", subdev->name); - mutex_lock(&vin->lock); rvin_parallel_subdevice_detach(vin); - mutex_unlock(&vin->lock); } static int rvin_parallel_notify_bound(struct v4l2_async_notifier *notifier, @@ -554,9 +552,7 @@ static int rvin_parallel_notify_bound(struct v4l2_async_notifier *notifier, struct rvin_dev *vin = v4l2_dev_to_vin(notifier->v4l2_dev); int ret; - mutex_lock(&vin->lock); ret = rvin_parallel_subdevice_attach(vin, subdev); - mutex_unlock(&vin->lock); if (ret) return ret; @@ -664,7 +660,6 @@ static int rvin_group_notify_complete(struct v4l2_async_notifier *notifier) } /* Create all media device links between VINs and CSI-2's. */ - mutex_lock(&vin->group->lock); for (route = vin->info->routes; route->mask; route++) { struct media_pad *source_pad, *sink_pad; struct media_entity *source, *sink; @@ -700,7 +695,6 @@ static int rvin_group_notify_complete(struct v4l2_async_notifier *notifier) break; } } - mutex_unlock(&vin->group->lock); return ret; } @@ -716,8 +710,6 @@ static void rvin_group_notify_unbind(struct v4l2_async_notifier *notifier, if (vin->group->vin[i]) rvin_v4l2_unregister(vin->group->vin[i]); - mutex_lock(&vin->group->lock); - for (i = 0; i < RVIN_CSI_MAX; i++) { if (vin->group->csi[i].fwnode != asd->match.fwnode) continue; @@ -725,8 +717,6 @@ static void rvin_group_notify_unbind(struct v4l2_async_notifier *notifier, vin_dbg(vin, "Unbind CSI-2 %s from slot %u\n", subdev->name, i); break; } - - mutex_unlock(&vin->group->lock); } static int rvin_group_notify_bound(struct v4l2_async_notifier *notifier, @@ -736,8 +726,6 @@ static int rvin_group_notify_bound(struct v4l2_async_notifier *notifier, struct rvin_dev *vin = v4l2_dev_to_vin(notifier->v4l2_dev); unsigned int i; - mutex_lock(&vin->group->lock); - for (i = 0; i < RVIN_CSI_MAX; i++) { if (vin->group->csi[i].fwnode != asd->match.fwnode) continue; @@ -746,8 +734,6 @@ static int rvin_group_notify_bound(struct v4l2_async_notifier *notifier, break; } - mutex_unlock(&vin->group->lock); - return 0; } |