svn commit: r347742 - stable/12/sys/ofed/drivers/infiniband/ulp/ipoib

[Hans Petter Selasky]

Author: hselasky
Date: Thu May 16 16:04:23 2019
New Revision: 347742
URL: https://svnweb.freebsd.org/changeset/base/347742

Log:
  MFC r347278:
  Fix endless loop in ipoib_poll().
  
  ib_req_notify_cq may return negative value which will indicate a
  failure. In the case of uncorrectable error, we will end up in an
  endless loop. Fix that, by going to another loop with poll_more
  only if there is anything left to poll.
  
  Submitted by:	slavash@
  Sponsored by:	Mellanox Technologies

Modified:
  stable/12/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_ib.c
Directory Properties:
  stable/12/   (props changed)

Modified: stable/12/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_ib.c
==============================================================================
--- stable/12/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_ib.c	Thu May 16 16:03:46 2019	(r347741)
+++ stable/12/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_ib.c	Thu May 16 16:04:23 2019	(r347742)
@@ -409,7 +409,7 @@ poll_more:
 	spin_unlock(&priv->drain_lock);
 
 	if (ib_req_notify_cq(priv->recv_cq,
-	    IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS))
+	    IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS) > 0)
 		goto poll_more;
 }