From: Steve Wise <[email protected]> Need to do an sfence after both the WC and regular PIDX DB write. Otherwise the host might reorder things and cause work request corruption (seen with NFSRDMA).
Signed-off-by: Steve Wise <[email protected]> --- drivers/infiniband/hw/cxgb4/t4.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/hw/cxgb4/t4.h b/drivers/infiniband/hw/cxgb4/t4.h index 67cd09ee..ace3154 100644 --- a/drivers/infiniband/hw/cxgb4/t4.h +++ b/drivers/infiniband/hw/cxgb4/t4.h @@ -470,12 +470,12 @@ static inline void t4_ring_sq_db(struct t4_wq *wq, u16 inc, u8 t5, PDBG("%s: WC wq->sq.pidx = %d\n", __func__, wq->sq.pidx); pio_copy(wq->sq.udb + 7, (void *)wqe); - wc_wmb(); } else { PDBG("%s: DB wq->sq.pidx = %d\n", __func__, wq->sq.pidx); writel(PIDX_T5(inc), wq->sq.udb); } + wc_wmb(); return; } writel(QID(wq->sq.qid) | PIDX(inc), wq->db); @@ -490,12 +490,12 @@ static inline void t4_ring_rq_db(struct t4_wq *wq, u16 inc, u8 t5, PDBG("%s: WC wq->rq.pidx = %d\n", __func__, wq->rq.pidx); pio_copy(wq->rq.udb + 7, (void *)wqe); - wc_wmb(); } else { PDBG("%s: DB wq->rq.pidx = %d\n", __func__, wq->rq.pidx); writel(PIDX_T5(inc), wq->rq.udb); } + wc_wmb(); return; } writel(QID(wq->rq.qid) | PIDX(inc), wq->db); -- 1.8.4 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
