[PATCH rdma-core RESEND] providers/rxe: Replace '%' with '&' in check_qp_queue_full()

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The expression "cons == ((qp->cur_index + 1) % q->index_mask)" mistakenly
assumes the queue is full when the number of entires is equal to "maximum - 1"
(maximum is correct).

For example:
If cons and qp->cur_index are 0 and q->index_mask is 1, check_qp_queue_full()
reports ENOSPC.

Fixes: 1a894ca10105 ("Providers/rxe: Implement ibv_create_qp_ex verb")
Signed-off-by: Xiao Yang <yangx.jy@xxxxxxxxxxx>
---
 providers/rxe/rxe_queue.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/providers/rxe/rxe_queue.h b/providers/rxe/rxe_queue.h
index 6de8140c..708e76ac 100644
--- a/providers/rxe/rxe_queue.h
+++ b/providers/rxe/rxe_queue.h
@@ -205,7 +205,7 @@ static inline int check_qp_queue_full(struct rxe_qp *qp)
 	if (qp->err)
 		goto err;
 
-	if (cons == ((qp->cur_index + 1) % q->index_mask))
+	if (cons == ((qp->cur_index + 1) & q->index_mask))
 		qp->err = ENOSPC;
 err:
 	return qp->err;
-- 
2.25.1






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