RDS: Fix locking in send on m_rs_lock

Do not nest m_rs_lock under c_lock

Disable interrupts in {rdma,atomic}_send_complete

Signed-off-by: Andy Grover <andy.grover@oracle.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/net/rds/send.c b/net/rds/send.c
index 15b715a85fd5..ecda3e6c432c 100644
--- a/net/rds/send.c
+++ b/net/rds/send.c
@@ -468,8 +468,9 @@ void rds_atomic_send_complete(struct rds_message *rm, int status)
         struct rds_sock *rs = NULL;
         struct rm_atomic_op *ao;
         struct rds_notifier *notifier;
+        unsigned long flags;
 
-        spin_lock(&rm->m_rs_lock);
+        spin_lock_irqsave(&rm->m_rs_lock, flags);
 
         ao = &rm->atomic;
         if (test_bit(RDS_MSG_ON_SOCK, &rm->m_flags)
@@ -486,7 +487,7 @@ void rds_atomic_send_complete(struct rds_message *rm, int status)
                 ao->op_notifier = NULL;
         }
 
-        spin_unlock(&rm->m_rs_lock);
+        spin_unlock_irqrestore(&rm->m_rs_lock, flags);
 
         if (rs) {
                 rds_wake_sk_sleep(rs);