[PATCH] v4l2: async: remove locking when initializing async notifier

* [PATCH] v4l2: async: remove locking when initializing async notifier
@ 2018-11-30  2:11 Niklas Söderlund
  0 siblings, 0 replies; only message in thread
From: Niklas Söderlund @ 2018-11-30  2:11 UTC (permalink / raw)
  To: Steve Longerbeam, Sakari Ailus, Hans Verkuil, linux-media
  Cc: Laurent Pinchart, linux-renesas-soc, Niklas Söderlund

There is no need to hold the list_lock when initializing the local
asd_list of a notifier. Remove the lock handling to simplify the code
and remove a potential LOCKDEP warning.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reported-by: Jacopo Mondi <jacopo@jmondi.org>
---
 drivers/media/v4l2-core/v4l2-async.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c
index a6d91370838d9342..15b0c44a76e7f6c3 100644
--- a/drivers/media/v4l2-core/v4l2-async.c
+++ b/drivers/media/v4l2-core/v4l2-async.c
@@ -424,11 +424,7 @@ static int v4l2_async_notifier_asd_valid(struct v4l2_async_notifier *notifier,
 
 void v4l2_async_notifier_init(struct v4l2_async_notifier *notifier)
 {
-	mutex_lock(&list_lock);
-
 	INIT_LIST_HEAD(&notifier->asd_list);
-
-	mutex_unlock(&list_lock);
 }
 EXPORT_SYMBOL(v4l2_async_notifier_init);
 
-- 
2.19.2

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