net/mlx5: E-Switch, return error if encap isn't supported

[ Upstream commit c4c3176739dfa6efcc5b1d1de4b3fd2b51b048c7 ]

On regular ConnectX HCAs getting encap mode isn't supported when the
E-Switch is in NONE mode. Current code would return no error code when
trying to get encap mode in such case which is wrong.

Fix by returning error value to indicate failure to caller in such case.

Fixes: 8e0aa4bc959c ("net/mlx5: E-switch, Protect eswitch mode changes")
Signed-off-by: Raed Salem <raeds@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index 164e8cd..e06b1ba 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -2714,7 +2714,7 @@ int mlx5_devlink_eswitch_encap_mode_get(struct devlink *devlink,
        *encap = esw->offloads.encap;
 unlock:
        up_write(&esw->mode_lock);
-       return 0;
+       return err;
 }
 
 static bool