IB/mad: Fix memory leak in switch handling in ib_mad_recv_done_handler()

If agent_send_response() returns an error, we shouldn't do anything
differently than if it succeeds; setting response to NULL just means
that the response buffer gets leaked.
Signed-off-by: Suresh Shelvapille <suri@baymicrosystems.com>
Signed-off-by: Hal Rosenstock <hal.rosenstock@gmail.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/core/mad.c

@@ -1916,12 +1916,11 @@ static void ib_mad_recv_done_handler(struct ib_mad_port_private *port_priv,
 			response->header.recv_wc.recv_buf.mad = &response->mad.mad;
 			response->header.recv_wc.recv_buf.grh = &response->grh;
 
-			if (!agent_send_response(&response->mad.mad,
-						 &response->grh, wc,
-						 port_priv->device,
-						 smi_get_fwd_port(&recv->mad.smp),
-						 qp_info->qp->qp_num))
-				response = NULL;
+			agent_send_response(&response->mad.mad,
+					    &response->grh, wc,
+					    port_priv->device,
+					    smi_get_fwd_port(&recv->mad.smp),
+					    qp_info->qp->qp_num);
 
 			goto out;
 		}