net/mlx5e: NAPI busy-poll when UMR post is in progress

If a UMR post is in progress, it means that there's a missing
WQE in RQ, and that a completion will be shortly available in
ICO SQ completion queue. Prefer busy-poll to handle it as soon
as possible.

Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
index fb3b836..8af6577 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
@@ -456,17 +456,16 @@ void mlx5e_dealloc_rx_mpwqe(struct mlx5e_rq *rq, u16 ix)
        mlx5e_free_rx_mpwqe(rq, wi);
 }
 
-#define RQ_CANNOT_POST(rq) \
-       (!test_bit(MLX5E_RQ_STATE_ENABLED, &rq->state) || \
-        test_bit(MLX5E_RQ_STATE_UMR_WQE_IN_PROGRESS, &rq->state))
-
 bool mlx5e_post_rx_wqes(struct mlx5e_rq *rq)
 {
        struct mlx5_wq_ll *wq = &rq->wq;
 
-       if (unlikely(RQ_CANNOT_POST(rq)))
+       if (unlikely(!test_bit(MLX5E_RQ_STATE_ENABLED, &rq->state)))
                return false;
 
+       if (test_bit(MLX5E_RQ_STATE_UMR_WQE_IN_PROGRESS, &rq->state))
+               return true;
+
        while (!mlx5_wq_ll_is_full(wq)) {
                struct mlx5e_rx_wqe *wqe = mlx5_wq_ll_get_wqe(wq, wq->head);
                int err;