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Commit 70b9c660 authored by Steve Wise's avatar Steve Wise Committed by Roland Dreier
Browse files

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: default avatarSteve Wise <swise@opengridcomputing.com>
Signed-off-by: default avatarRoland Dreier <roland@purestorage.com>
parent 1ce1d471

drivers/infiniband/hw/cxgb4/cq.c

+20 −4
Original line number Diff line number Diff line
@@ -365,8 +365,14 @@ void c4iw_flush_hw_cq(struct c4iw_cq *chp) 


		if (CQE_OPCODE(hw_cqe) == FW_RI_READ_RESP) {



			/*

			 * drop peer2peer RTR reads.

			/* If we have reached here because of async

			 * 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)

				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 this is an unsolicited read response, then the read

		/* If we have reached here because of async

		 * 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

		 * connection setup.  So ignore the completion.

		 */