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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 <selvin.xavier@emulex.com>
Signed-off-by: Devesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Selvin Xavier 2014-06-10 19:32:19 +05:30 committed by Roland Dreier
parent daac96815e
commit a96ffb1de9
1 changed files with 10 additions and 0 deletions
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10
drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
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@ -2489,6 +2489,11 @@ static bool ocrdma_poll_err_scqe(struct ocrdma_qp *qp,
*stop = true; *stop = true;
expand = false; expand = false;
} }
} else if (is_hw_sq_empty(qp)) {
/* Do nothing */
expand = false;
*polled = false;
*stop = false;
} else { } else {
*polled = true; *polled = true;
expand = ocrdma_update_err_scqe(ibwc, cqe, qp, status); 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; *stop = true;
expand = false; expand = false;
} }
} else if (is_hw_rq_empty(qp)) {
/* Do nothing */
expand = false;
*polled = false;
*stop = false;
} else { } else {
*polled = true; *polled = true;
expand = ocrdma_update_err_rcqe(ibwc, cqe, qp, status); expand = ocrdma_update_err_rcqe(ibwc, cqe, qp, status);