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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>
This commit is contained in:
Shiraz Saleem 2017-12-22 09:47:00 -06:00 committed by Jason Gunthorpe
parent df8b13a1b2
commit 756f77d216
1 changed files with 2 additions and 1 deletions
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3
drivers/infiniband/hw/i40iw/i40iw_hw.c
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@ -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: