netdev - [PATCH net 1/6] net/mlx5e: Fix XDP error path of mlx5e_open

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Message-Id: <1478216927-31328-2-git-send-email-saeedm@mellanox.com>
Date:   Fri,  4 Nov 2016 01:48:42 +0200
From:   Saeed Mahameed <saeedm@...lanox.com>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org, Or Gerlitz <ogerlitz@...lanox.com>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Saeed Mahameed <saeedm@...lanox.com>
Subject: [PATCH net 1/6] net/mlx5e: Fix XDP error path of mlx5e_open_channel()

In case of mlx5e_open_rq fails the error handling will jump to
label err_close_xdp_sq and will try to close the xdp_sq unconditionally.
xdp_sq is valid only in case of XDP use cases, i.e priv->xdp_prog is
not null.

To fix this in this patch we test xdp_sq validity prior to closing it.

In addition we now close the xdp_sq.cq as well.

Fixes: b5503b994ed5 ("net/mlx5e: XDP TX forwarding support")
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
Reported-by: Jesper Dangaard Brouer <brouer@...hat.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index f4c687c..c83619d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -1512,7 +1512,10 @@ static int mlx5e_open_channel(struct mlx5e_priv *priv, int ix,
 
 	return 0;
 err_close_xdp_sq:
-	mlx5e_close_sq(&c->xdp_sq);
+	if (priv->xdp_prog) {
+		mlx5e_close_sq(&c->xdp_sq);
+		mlx5e_close_cq(&c->xdp_sq.cq);
+	}
 
 err_close_sqs:
 	mlx5e_close_sqs(c);
-- 
2.7.4