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RDMA/cxgb4: Ignore read reponse type 1 CQEs 

These are generated by HW in some error cases and need to be
silently discarded.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Steve Wise 2014-03-21 20:40:32 +05:30 committed by Roland Dreier
parent 1ce1d471ac
commit 70b9c66053
1 changed files with 20 additions and 4 deletions
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24
drivers/infiniband/hw/cxgb4/cq.c
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@ -365,8 +365,14 @@ void c4iw_flush_hw_cq(struct c4iw_cq *chp)
if (CQE_OPCODE(hw_cqe) == FW_RI_READ_RESP) { if (CQE_OPCODE(hw_cqe) == FW_RI_READ_RESP) {
/* /* If we have reached here because of async
* drop peer2peer RTR reads. * event or other error, and have egress error
* then drop
*/
if (CQE_TYPE(hw_cqe) == 1)
goto next_cqe;
/* drop peer2peer RTR reads.
*/ */
if (CQE_WRID_STAG(hw_cqe) == 1) if (CQE_WRID_STAG(hw_cqe) == 1)
goto next_cqe; goto next_cqe;
@ -511,8 +517,18 @@ static int poll_cq(struct t4_wq *wq, struct t4_cq *cq, struct t4_cqe *cqe,
*/ */
if (RQ_TYPE(hw_cqe) && (CQE_OPCODE(hw_cqe) == FW_RI_READ_RESP)) { if (RQ_TYPE(hw_cqe) && (CQE_OPCODE(hw_cqe) == FW_RI_READ_RESP)) {
/* /* If we have reached here because of async
* If this is an unsolicited read response, then the read * event or other error, and have egress error
* then drop
*/
if (CQE_TYPE(hw_cqe) == 1) {
if (CQE_STATUS(hw_cqe))
t4_set_wq_in_error(wq);
ret = -EAGAIN;
goto skip_cqe;
}
/* If this is an unsolicited read response, then the read
* was generated by the kernel driver as part of peer-2-peer * was generated by the kernel driver as part of peer-2-peer
* connection setup. So ignore the completion. * connection setup. So ignore the completion.
*/ */