net/ibm/emac: fix type of phy_mode

phy_mode can be negative.

The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2038576

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/ibm/emac/core.h b/drivers/net/ethernet/ibm/emac/core.h
index 28df37420da963d5d8f3b3234e4f584442537121..f379e474ba7ccd3eb9193e2d376d70727ab19594 100644 (file)
--- a/drivers/net/ethernet/ibm/emac/core.h
+++ b/drivers/net/ethernet/ibm/emac/core.h
@@ -181,7 +181,7 @@ struct emac_instance {
        struct mal_commac               commac;
 
        /* PHY infos */
-       u32                             phy_mode;
+       int                             phy_mode;
        u32                             phy_map;
        u32                             phy_address;
        u32                             phy_feat_exc;