[PATCH v2] net/mlx5: Fix missing return value in mlx5_devlink_eswitch_inline_mode_set()

The return value is missing in this code scenario, add the return value
'0' to the return value 'err'.

Eliminate the follow smatch warning:

drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c:3083
mlx5_devlink_eswitch_inline_mode_set() warn: missing error code 'err'.

Reported-by: Abaci Robot <redacted>
Fixes: 8e0aa4bc959c ("net/mlx5: E-switch, Protect eswitch mode changes")
Signed-off-by: Jiapeng Chong <redacted>
---
Changes in v2:
  -For the follow advice: https://lore.kernel.org/patchwork/patch/1461601/

 drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index 7579f34..6b0b629 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c

@@ -3079,8 +3079,11 @@ int mlx5_devlink_eswitch_inline_mode_set(struct devlink *devlink, u8 mode,
 
 	switch (MLX5_CAP_ETH(dev, wqe_inline_mode)) {
 	case MLX5_CAP_INLINE_MODE_NOT_REQUIRED:
-		if (mode == DEVLINK_ESWITCH_INLINE_MODE_NONE)
+		if (mode == DEVLINK_ESWITCH_INLINE_MODE_NONE) {
+			err = 0;
 			goto out;
+		}
+
 		fallthrough;
 	case MLX5_CAP_INLINE_MODE_L2:
 		NL_SET_ERR_MSG_MOD(extack, "Inline mode can't be set");

-- 
1.8.3.1

On Thu, Jul 22, 2021 at 05:58:16PM +0800, Jiapeng Chong wrote:

The return value is missing in this code scenario, add the return value
'0' to the return value 'err'.

Eliminate the follow smatch warning:

drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c:3083
mlx5_devlink_eswitch_inline_mode_set() warn: missing error code 'err'.

Reported-by: Abaci Robot <redacted>
Fixes: 8e0aa4bc959c ("net/mlx5: E-switch, Protect eswitch mode changes")
Signed-off-by: Jiapeng Chong <redacted>
---
Changes in v2:
  -For the follow advice: https://lore.kernel.org/patchwork/patch/1461601/

 drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

Thanks,
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>

On Thu, 2021-07-22 at 17:58 +0800, Jiapeng Chong wrote:

Although err is already 0 at this point even before this patch,
otherwise the function would've aborted earlier, I will apply this to
net-next-mlx5, since I like the explicit return value here as it shows
the real intention of the code.
but smatch needs to be investigated.

Applied to net-next-mlx5, 
Thanks.

                        goto out;
+               }
+
                fallthrough;
        case MLX5_CAP_INLINE_MODE_L2:
                NL_SET_ERR_MSG_MOD(extack, "Inline mode can't be
set");