[PATCH for-next] RDMA/rxe: Convert spin_lock_irqsave to spin_lock

[Bob Pearson <rpearsonhpe@gmail.com>]

Currently the rxe driver uses a spin_lock_irqsave call to protect
the producer end of a completion queue from multiple QPs which may
be sharing the cq. Since all accesses to the cq are from tasklets
this is overkill and a simple spin_lock will be sufficient.

Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
---
 drivers/infiniband/sw/rxe/rxe_cq.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/infiniband/sw/rxe/rxe_cq.c b/drivers/infiniband/sw/rxe/rxe_cq.c
index 76534bc66cb6..408ffe2e6f14 100644
--- a/drivers/infiniband/sw/rxe/rxe_cq.c
+++ b/drivers/infiniband/sw/rxe/rxe_cq.c
@@ -104,13 +104,12 @@ int rxe_cq_post(struct rxe_cq *cq, struct rxe_cqe *cqe, int solicited)
 	struct ib_event ev;
 	int full;
 	void *addr;
-	unsigned long flags;
 
-	spin_lock_irqsave(&cq->cq_lock, flags);
+	spin_lock(&cq->cq_lock);
 
 	full = queue_full(cq->queue, QUEUE_TYPE_TO_CLIENT);
 	if (unlikely(full)) {
-		spin_unlock_irqrestore(&cq->cq_lock, flags);
+		spin_unlock(&cq->cq_lock);
 		if (cq->ibcq.event_handler) {
 			ev.device = cq->ibcq.device;
 			ev.element.cq = &cq->ibcq;
@@ -126,7 +125,7 @@ int rxe_cq_post(struct rxe_cq *cq, struct rxe_cqe *cqe, int solicited)
 
 	queue_advance_producer(cq->queue, QUEUE_TYPE_TO_CLIENT);
 
-	spin_unlock_irqrestore(&cq->cq_lock, flags);
+	spin_unlock(&cq->cq_lock);
 
 	if ((cq->notify == IB_CQ_NEXT_COMP) ||
 	    (cq->notify == IB_CQ_SOLICITED && solicited)) {

base-commit: cbdae01d8b517b81ed271981395fee8ebd08ba7d
-- 
2.34.1