[PATCH 5/7] [Bionic/Unstable] thunderbolt: No need to take tb->lock in domain suspend/complete

[Kai-Heng Feng]

From: Mika Westerberg <mika.westerberg at linux.intel.com>

BugLink: https://bugs.launchpad.net/bugs/1789358

If the connection manager implementation needs to touch the domain
structures it ought to take the lock itself. Currently only ICM
implements these hooks and it does not need the lock because we there
will be no notifications before driver ready message is sent to it.

Signed-off-by: Mika Westerberg <mika.westerberg at linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
(cherry picked from commit 84db68587651d453a9b5e901c787a49866e34b1e)
Signed-off-by: Kai-Heng Feng <kai.heng.feng at canonical.com>
---
 drivers/thunderbolt/domain.c | 15 +--------------
 1 file changed, 1 insertion(+), 14 deletions(-)

diff --git a/drivers/thunderbolt/domain.c b/drivers/thunderbolt/domain.c
index a923ebdeb73c..e377128663e9 100644
--- a/drivers/thunderbolt/domain.c
+++ b/drivers/thunderbolt/domain.c
@@ -509,26 +509,13 @@ int tb_domain_resume_noirq(struct tb *tb)
 
 int tb_domain_suspend(struct tb *tb)
 {
-	int ret;
-
-	mutex_lock(&tb->lock);
-	if (tb->cm_ops->suspend) {
-		ret = tb->cm_ops->suspend(tb);
-		if (ret) {
-			mutex_unlock(&tb->lock);
-			return ret;
-		}
-	}
-	mutex_unlock(&tb->lock);
-	return 0;
+	return tb->cm_ops->suspend ? tb->cm_ops->suspend(tb) : 0;
 }
 
 void tb_domain_complete(struct tb *tb)
 {
-	mutex_lock(&tb->lock);
 	if (tb->cm_ops->complete)
 		tb->cm_ops->complete(tb);
-	mutex_unlock(&tb->lock);
 }
 
 /**
-- 
2.17.1