RDS/IB+IW: Move recv processing to a tasklet

Move receive processing from event handler to a tasklet.
This should help prevent hangcheck timer from going off
when RDS is under heavy load.

Signed-off-by: Andy Grover <andy.grover@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/rds/ib_cm.c b/net/rds/ib_cm.c
index c2d372f..9d320692 100644
--- a/net/rds/ib_cm.c
+++ b/net/rds/ib_cm.c
@@ -694,6 +694,8 @@
 		return -ENOMEM;
 
 	INIT_LIST_HEAD(&ic->ib_node);
+	tasklet_init(&ic->i_recv_tasklet, rds_ib_recv_tasklet_fn,
+		     (unsigned long) ic);
 	mutex_init(&ic->i_recv_mutex);
 #ifndef KERNEL_HAS_ATOMIC64
 	spin_lock_init(&ic->i_ack_lock);