net/smc: call smc_cdc_msg_send() under send_lock

Call smc_cdc_msg_send() under the connection send_lock to make sure all send operations for one connection are serialized. Signed-off-by: Karsten Graul <[email protected]> Signed-off-by: Ursula Braun <[email protected]> Signed-off-by: David S. Miller <[email protected]>
jic23 · Feb 1, 2019 · 2dee25a · 2dee25a
1 parent 33f3fcc
commit 2dee25a
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/net/smc/smc_cdc.c b/net/smc/smc_cdc.c
@@ -125,7 +125,10 @@ static int smcr_cdc_get_slot_and_msg_send(struct smc_connection *conn)
 	if (rc)
 		return rc;
 
-	return smc_cdc_msg_send(conn, wr_buf, pend);
+	spin_lock_bh(&conn->send_lock);
+	rc = smc_cdc_msg_send(conn, wr_buf, pend);
+	spin_unlock_bh(&conn->send_lock);
+	return rc;
 }
 
 int smc_cdc_get_slot_and_msg_send(struct smc_connection *conn)