iw_cxgb4: only clear the ARMED bit if a notification is needed

In __flush_qp(), the CQ ARMED bit was being cleared regardless of
whether any notification is actually needed.  This resulted in the iser
termination logic getting stuck in ib_drain_sq() because the CQ was not
marked ARMED and thus the drain CQE notification wasn't triggered.

This new bug was exposed when this commit was merged:

commit cbb40fadd31c ("iw_cxgb4: only call the cq comp_handler when the
cq is armed")

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/infiniband/hw/cxgb4/qp.c b/drivers/infiniband/hw/cxgb4/qp.c
index 5ee7fe433136..355e288ec969 100644
--- a/drivers/infiniband/hw/cxgb4/qp.c
+++ b/drivers/infiniband/hw/cxgb4/qp.c
@@ -1285,21 +1285,21 @@ static void __flush_qp(struct c4iw_qp *qhp, struct c4iw_cq *rchp,
         spin_unlock_irqrestore(&rchp->lock, flag);
 
         if (schp == rchp) {
-                if (t4_clear_cq_armed(&rchp->cq) &&
-                    (rq_flushed || sq_flushed)) {
+                if ((rq_flushed || sq_flushed) &&
+                    t4_clear_cq_armed(&rchp->cq)) {
                         spin_lock_irqsave(&rchp->comp_handler_lock, flag);
                         (*rchp->ibcq.comp_handler)(&rchp->ibcq,
                                                    rchp->ibcq.cq_context);
                         spin_unlock_irqrestore(&rchp->comp_handler_lock, flag);
                 }
         } else {
-                if (t4_clear_cq_armed(&rchp->cq) && rq_flushed) {
+                if (rq_flushed && t4_clear_cq_armed(&rchp->cq)) {
                         spin_lock_irqsave(&rchp->comp_handler_lock, flag);
                         (*rchp->ibcq.comp_handler)(&rchp->ibcq,
                                                    rchp->ibcq.cq_context);
                         spin_unlock_irqrestore(&rchp->comp_handler_lock, flag);
                 }
-                if (t4_clear_cq_armed(&schp->cq) && sq_flushed) {
+                if (sq_flushed && t4_clear_cq_armed(&schp->cq)) {
                         spin_lock_irqsave(&schp->comp_handler_lock, flag);
                         (*schp->ibcq.comp_handler)(&schp->ibcq,
                                                    schp->ibcq.cq_context);