1 files changed, 24 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/qib/qib_rc.c b/drivers/infiniband/hw/qib/qib_rc.c
index 955fb7157793..8245237b67ce 100644
--- a/drivers/infiniband/hw/qib/qib_rc.c
+++ b/drivers/infiniband/hw/qib/qib_rc.c
@@ -1407,6 +1407,7 @@ static void qib_rc_rcv_resp(struct qib_ibport *ibp,
                             struct qib_ctxtdata *rcd)
 {
         struct qib_swqe *wqe;
+        struct qib_pportdata *ppd = ppd_from_ibp(ibp);
         enum ib_wc_status status;
         unsigned long flags;
         int diff;
@@ -1414,6 +1415,29 @@ static void qib_rc_rcv_resp(struct qib_ibport *ibp,
         u32 aeth;
         u64 val;
 
+        if (opcode != OP(RDMA_READ_RESPONSE_MIDDLE)) {
+                /*
+                 * If ACK'd PSN on SDMA busy list try to make progress to
+                 * reclaim SDMA credits.
+                 */
+                if ((qib_cmp24(psn, qp->s_sending_psn) >= 0) &&
+                    (qib_cmp24(qp->s_sending_psn, qp->s_sending_hpsn) <= 0)) {
+
+                        /*
+                         * If send tasklet not running attempt to progress
+                         * SDMA queue.
+                         */
+                        if (!(qp->s_flags & QIB_S_BUSY)) {
+                                /* Acquire SDMA Lock */
+                                spin_lock_irqsave(&ppd->sdma_lock, flags);
+                                /* Invoke sdma make progress */
+                                qib_sdma_make_progress(ppd);
+                                /* Release SDMA Lock */
+                                spin_unlock_irqrestore(&ppd->sdma_lock, flags);
+                        }
+                }
+        }
+
         spin_lock_irqsave(&qp->s_lock, flags);
 
         /* Ignore invalid responses. */