[PATCH v2] sfc: Propagate the return value of devlink_info_serial_number_put()

[Wentao Liang]

The function efx_devlink_info_board_cfg() calls the function
devlink_info_serial_number_put(), but does not check its return
value.

Return the error code if either the devlink_info_serial_number_put()
or the efx_mcdi_get_board_cfg() fails.The control flow of the code is
changed a little bit to simplify the code. The functionality of the
code remain the same.

Fixes: 14743ddd2495 ("sfc: add devlink info support for ef100")
Cc: stable@xxxxxxxxxxxxxxx # v6.3+
Signed-off-by: Wentao Liang <vulab@xxxxxxxxxxx>
---
v2: Simplify code logic.

 drivers/net/ethernet/sfc/efx_devlink.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/sfc/efx_devlink.c b/drivers/net/ethernet/sfc/efx_devlink.c
index 3cd750820fdd..53b17cd252c8 100644
--- a/drivers/net/ethernet/sfc/efx_devlink.c
+++ b/drivers/net/ethernet/sfc/efx_devlink.c
@@ -584,11 +584,12 @@ static int efx_devlink_info_board_cfg(struct efx_nic *efx,
 	int rc;
 
 	rc = efx_mcdi_get_board_cfg(efx, (u8 *)mac_address, NULL, NULL);
-	if (!rc) {
-		snprintf(sn, EFX_MAX_SERIALNUM_LEN, "%pm", mac_address);
-		devlink_info_serial_number_put(req, sn);
-	}
-	return rc;
+	if (rc)
+		return rc;
+
+	snprintf(sn, EFX_MAX_SERIALNUM_LEN, "%pm", mac_address);
+
+	return devlink_info_serial_number_put(req, sn);
 }
 
 static int efx_devlink_info_get(struct devlink *devlink,
-- 
2.42.0.windows.2