From 84db68587651d453a9b5e901c787a49866e34b1e Mon Sep 17 00:00:00 2001
From: Mika Westerberg <mika.westerberg@linux.intel.com>
Date: Wed, 25 Jul 2018 11:03:18 +0300
Subject: [PATCH] thunderbolt: No need to take tb->lock in domain
 suspend/complete
Patch-mainline: v4.19-rc1
Git-commit: 84db68587651d453a9b5e901c787a49866e34b1e
References: FATE#325777

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@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Oliver Neukum <oneukum@suse.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);
 }
 
 /**
-- 
2.16.4