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Date: Mon, 10 Mar 2014 22:38:15 +0530 From: Hariprasad Shenai <hariprasad@...lsio.com> To: netdev@...r.kernel.org, linux-rdma@...r.kernel.org Cc: davem@...emloft.net, roland@...estorage.com, dm@...lsio.com, swise@...ngridcomputing.com, leedom@...lsio.com, santosh@...lsio.com, kumaras@...lsio.com, nirranjan@...lsio.com, hariprasad@...lsio.com Subject: [PATCHv5 net-next 18/31] iw_cxgb4: ignore read reponse type 1 CQEs From: Steve Wise <swise@...ngridcomputing.com> These are generated by HW in some error cases and need to be silently discarded. Signed-off-by: Steve Wise <swise@...ngridcomputing.com> --- drivers/infiniband/hw/cxgb4/cq.c | 24 ++++++++++++++++++++---- 1 file changed, 20 insertions(+), 4 deletions(-) diff --git a/drivers/infiniband/hw/cxgb4/cq.c b/drivers/infiniband/hw/cxgb4/cq.c index 59f7601..55f7157 100644 --- a/drivers/infiniband/hw/cxgb4/cq.c +++ b/drivers/infiniband/hw/cxgb4/cq.c @@ -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. */ -- 1.8.4 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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