[PATCH] amd-xgbe: fix unsigned comparison against less than zero

[Colin King]

From: Colin Ian King <colin.k...@canonical.com>

Comparing unsigned int ret to less than zero for an error status
check is never true.  Fix this by making ret a signed int. Reduce
scope of ret too.

Found with static analysis by CoverityScan, CID 1377750

Signed-off-by: Colin Ian King <colin.k...@canonical.com>
---
 drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c 
b/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c
index 4ba4332..168507e 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c
@@ -2346,7 +2346,7 @@ static bool xgbe_phy_valid_speed(struct xgbe_prv_data 
*pdata, int speed)
 static int xgbe_phy_link_status(struct xgbe_prv_data *pdata, int *an_restart)
 {
        struct xgbe_phy_data *phy_data = pdata->phy_data;
-       unsigned int ret, reg;
+       unsigned int reg;
 
        *an_restart = 0;
 
@@ -2365,7 +2365,8 @@ static int xgbe_phy_link_status(struct xgbe_prv_data 
*pdata, int *an_restart)
 
        if (phy_data->phydev) {
                /* Check external PHY */
-               ret = phy_read_status(phy_data->phydev);
+               int ret = phy_read_status(phy_data->phydev);
+
                if (ret < 0)
                        return 0;
 
-- 
2.10.2