IB/hfi1: Add additional checks when handling TID RDMA READ RESP packet
authorKaike Wan <kaike.wan@intel.com>
Thu, 15 Aug 2019 19:20:45 +0000 (15:20 -0400)
committerDoug Ledford <dledford@redhat.com>
Tue, 20 Aug 2019 17:44:44 +0000 (13:44 -0400)
commita8adbf7d0d0a6e3bf7f99da461a06039364e028b
tree2c819f4c453431e298c2858069091fea48983bb8
parent35d5c8b82e2c32e8e29ca195bb4dac60ba7d97fc
IB/hfi1: Add additional checks when handling TID RDMA READ RESP packet

In a congested fabric with adaptive routing enabled, traces show that
packets could be delivered out of order, which could cause incorrect
processing of stale packets. For stale TID RDMA READ RESP packets that
cause KDETH EFLAGS errors, this patch adds additional checks before
processing the packets.

Fixes: 9905bf06e890 ("IB/hfi1: Add functions to receive TID RDMA READ response")
Cc: <stable@vger.kernel.org>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Link: https://lore.kernel.org/r/20190815192045.105923.59813.stgit@awfm-01.aw.intel.com
Signed-off-by: Doug Ledford <dledford@redhat.com>
drivers/infiniband/hw/hfi1/tid_rdma.c