netdev - [PATCH 2/5] rds: ib: replace spin_lock_irq with spin_lock

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Message-Id: <1489044405-26150-2-git-send-email-yanjun.zhu@oracle.com>
Date:   Thu,  9 Mar 2017 02:26:42 -0500
From:   Zhu Yanjun <yanjun.zhu@...cle.com>
To:     santosh.shilimkar@...cle.com, netdev@...r.kernel.org,
        linux-rdma@...r.kernel.org, rds-devel@....oracle.com
Subject: [PATCH 2/5] rds: ib: replace spin_lock_irq with spin_lock_irqsave

It is difficult to make sure the state of the interrupt when this
function is called. As such, it is safer to use spin_lock_irqsave
than spin_lock_irq.

Cc: Joe Jin <joe.jin@...cle.com>
Cc: Junxiao Bi <junxiao.bi@...cle.com>
Signed-off-by: Zhu Yanjun <yanjun.zhu@...cle.com>
---
 net/rds/ib_cm.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/net/rds/ib_cm.c b/net/rds/ib_cm.c
index eca3d5f..87ec4dd 100644
--- a/net/rds/ib_cm.c
+++ b/net/rds/ib_cm.c
@@ -963,6 +963,7 @@ void rds_ib_conn_free(void *arg)
 {
 	struct rds_ib_connection *ic = arg;
 	spinlock_t	*lock_ptr;
+	unsigned long	flags;
 
 	rdsdebug("ic %p\n", ic);
 
@@ -973,9 +974,9 @@ void rds_ib_conn_free(void *arg)
 	 */
 	lock_ptr = ic->rds_ibdev ? &ic->rds_ibdev->spinlock : &ib_nodev_conns_lock;
 
-	spin_lock_irq(lock_ptr);
+	spin_lock_irqsave(lock_ptr, flags);
 	list_del(&ic->ib_node);
-	spin_unlock_irq(lock_ptr);
+	spin_unlock_irqrestore(lock_ptr, flags);
 
 	rds_ib_recv_free_caches(ic);
 
-- 
2.7.4