linux_dsm_epyc7002/drivers/infiniband
Hariprasad S e8667a9b35 RDMA/iw_cxgb4: Handle ULP accept/reject during ABORTING
c4iw_reject() and c4iw_accept() need to handle the case where the
endpoint has timed out and is in the middle of ABORTING the connection.

Here is the flow that causes the BUG_ON() to fire on the server side:

1) offload connection setup and endpoint timer started

2) MPA_START request received from peer, CONNECT_REQUEST passed to ULP

3) endpoint timer fires, and process_timeout() aborts the connection,
this moves the endpoint state to ABORTING until HW sends up the
ABORT_RPL_RSS.

4) application exits closing the CONNECT_REQUEST cm_id.  The IWCM calls
c4iw_reject_cr() to destroy this connection request.

5) WHAMO: BUG_ON() because the state is ABORTING.

The fix is to change c4iw_reject_cr() and c4iw_accept_cr() to fail the
operation if the state is not in MPA_REQ_RCVD vs in DEAD.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-05-13 19:38:09 -04:00
..
core IB/security: Restrict use of the write() interface 2016-04-28 12:03:16 -04:00
hw RDMA/iw_cxgb4: Handle ULP accept/reject during ABORTING 2016-05-13 19:38:09 -04:00
sw IB/hfi1: Use global defines for upper bits in opcode 2016-04-28 16:32:28 -04:00
ulp IB/srp: Move common code into the caller 2016-05-12 14:18:57 -04:00
Kconfig Merge branches 'i40iw', 'sriov' and 'hfi1' into k.o/for-4.6 2016-03-21 17:32:23 -04:00
Makefile IB/rdmavt: Create module framework and handle driver registration 2016-03-10 20:37:04 -05:00