From: Aya Levin <ayal@mellanox.com>
Date: Thu, 12 Mar 2020 12:35:32 +0200
Subject: net/mlx5e: Fix missing reset of SW metadata in Striding RQ reset
Patch-mainline: v5.6
Git-commit: 39369fd536d485a99a59d8e357c0d4d3ce19a3b8
References: jsc#SLE-8464

When resetting the RQ (moving RQ state from RST to RDY), the driver
resets the WQ's SW metadata.
In striding RQ mode, we maintain a field that reflects the actual
expected WQ head (including in progress WQEs posted to the ICOSQ).
It was mistakenly not reset together with the WQ. Fix this here.

Fixes: 8276ea1353a4 ("net/mlx5e: Report and recover from CQE with error on RQ")
Signed-off-by: Aya Levin <ayal@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h
@@ -181,10 +181,12 @@ mlx5e_tx_dma_unmap(struct device *pdev,
 
 static inline void mlx5e_rqwq_reset(struct mlx5e_rq *rq)
 {
-	if (rq->wq_type == MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ)
+	if (rq->wq_type == MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ) {
 		mlx5_wq_ll_reset(&rq->mpwqe.wq);
-	else
+		rq->mpwqe.actual_wq_head = 0;
+	} else {
 		mlx5_wq_cyc_reset(&rq->wqe.wq);
+	}
 }
 
 /* SW parser related functions */