From a96ffb1de9d656ce7083277a8badaa1082813498 Mon Sep 17 00:00:00 2001 From: Selvin Xavier Date: Tue, 10 Jun 2014 19:32:19 +0530 Subject: [PATCH] RDMA/ocrdma: Avoid reporting wrong completions in case of error CQEs During cable pull test with a mount over NFS/RDMA, the driver was reporting error completions when there were no pending requests in the SQ and RQ. This was triggering a host crash because of reporting wrong work req id. Avoid this crash by adding a check for SQ and RQ empty condition and prevent reporting completions if queues are empty. Signed-off-by: Selvin Xavier Signed-off-by: Devesh Sharma Signed-off-by: Roland Dreier --- drivers/infiniband/hw/ocrdma/ocrdma_verbs.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c index 0d7d808..2b68235 100644 --- a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c +++ b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c @@ -2489,6 +2489,11 @@ static bool ocrdma_poll_err_scqe(struct ocrdma_qp *qp, *stop = true; expand = false; } + } else if (is_hw_sq_empty(qp)) { + /* Do nothing */ + expand = false; + *polled = false; + *stop = false; } else { *polled = true; expand = ocrdma_update_err_scqe(ibwc, cqe, qp, status); @@ -2594,6 +2599,11 @@ static bool ocrdma_poll_err_rcqe(struct ocrdma_qp *qp, struct ocrdma_cqe *cqe, *stop = true; expand = false; } + } else if (is_hw_rq_empty(qp)) { + /* Do nothing */ + expand = false; + *polled = false; + *stop = false; } else { *polled = true; expand = ocrdma_update_err_rcqe(ibwc, cqe, qp, status); -- 2.7.4