i40iw: Ignore LLP_DOUBT_REACHABILITY AE

The LLP_DOUBT_REACHABILITY Asynchronous Event (AE) is an early
warning of a connection issue. It is followed by LLP_TOO_MANY_RETRIES
AE, if the retransmit threshold is reached and recovery is not possible
for the connection.

Currently we terminate the connection on receiving the
LLP_DOUBT_REACHABILITY AE. Ignore this AE and
terminate the connection only on LLP_TOO_MANY_RETRIES AE.

This improves the user experience on cable disconnect/reconnect
scenario while running iWARP traffic. On cable disconnect,
the QP traffic is paused and the user has a larger and more
reasonable timeout within which if the cable is reconnected,
traffic can continue.

Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

diff --git a/drivers/infiniband/hw/i40iw/i40iw_hw.c b/drivers/infiniband/hw/i40iw/i40iw_hw.c
index e96bdaf..61540e1 100644 (file)
--- a/drivers/infiniband/hw/i40iw/i40iw_hw.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_hw.c
@@ -385,6 +385,8 @@ void i40iw_process_aeq(struct i40iw_device *iwdev)
                                iwcq->ibcq.event_handler(&ibevent, iwcq->ibcq.cq_context);
                        }
                        break;
+               case I40IW_AE_LLP_DOUBT_REACHABILITY:
+                       break;
                case I40IW_AE_PRIV_OPERATION_DENIED:
                case I40IW_AE_STAG_ZERO_INVALID:
                case I40IW_AE_IB_RREQ_AND_Q1_FULL:
@@ -403,7 +405,6 @@ void i40iw_process_aeq(struct i40iw_device *iwdev)
                case I40IW_AE_LLP_SEGMENT_TOO_SMALL:
                case I40IW_AE_LLP_SYN_RECEIVED:
                case I40IW_AE_LLP_TOO_MANY_RETRIES:
-               case I40IW_AE_LLP_DOUBT_REACHABILITY:
                case I40IW_AE_LCE_QP_CATASTROPHIC:
                case I40IW_AE_LCE_FUNCTION_CATASTROPHIC:
                case I40IW_AE_LCE_CQ_CATASTROPHIC: