RDS: check for congestion updates during rds_send_xmit

Ensure we don't keep sending the data if the link is congested.

Reviewed-by: Ajaykumar Hotchandani <ajaykumar.hotchandani@oracle.com>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/rds/send.c b/net/rds/send.c
index 2581b8e3dbe7..dd901c324edf 100644
--- a/net/rds/send.c
+++ b/net/rds/send.c
@@ -411,7 +411,8 @@ over_batch:
          */
         if (ret == 0) {
                 smp_mb();
-                if (!list_empty(&conn->c_send_queue) &&
+                if ((test_bit(0, &conn->c_map_queued) ||
+                     !list_empty(&conn->c_send_queue)) &&
                     send_gen == conn->c_send_gen) {
                         rds_stats_inc(s_send_lock_queue_raced);
                         goto restart;