netdev - [PATCH 4.19] net/mlx5e: Don't support phys switch id if not in switchdev mode

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Date:   Thu,  6 Aug 2020 19:05:42 -0700
From:   Saeed Mahameed <saeedm@...lanox.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org
Cc:     stable@...r.kernel.org, netdev@...r.kernel.org,
        Roi Dayan <roid@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>
Subject: [PATCH 4.19] net/mlx5e: Don't support phys switch id if not in switchdev mode

From: Roi Dayan <roid@...lanox.com>

Support for phys switch id ndo added for representors and if
we do not have representors there is no need to support it.
Since each port return different switch id supporting this
block support for creating bond over PFs and attaching to bridge
in legacy mode.

This bug doesn't exist upstream as the code got refactored and the
netdev api is totally different.

Fixes: cb67b832921c ("net/mlx5e: Introduce SRIOV VF representors")
Signed-off-by: Roi Dayan <roid@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
---
Hi Greg,

Sorry for submitting a non upstream patch, but this bug is
bothering some users on 4.19-stable kernels and it doesn't exist
upstream, so i hope you are ok with backporting this one liner patch.

Thanks !!

 drivers/net/ethernet/mellanox/mlx5/core/en_rep.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
index 701624a63d2f..1ab40d622ae1 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
@@ -198,7 +198,7 @@ int mlx5e_attr_get(struct net_device *dev, struct switchdev_attr *attr)
 	struct mlx5_eswitch_rep *rep = rpriv->rep;
 	struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
 
-	if (esw->mode == SRIOV_NONE)
+	if (esw->mode != SRIOV_OFFLOADS)
 		return -EOPNOTSUPP;
 
 	switch (attr->id) {
-- 
2.8.4