r8169: fix handling rtl_readphy result

The function can return negative value.

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

[1]: http://permalink.gmane.org/gmane.linux.kernel/2046107

Signed-off-by: Andrzej Hajda <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index 2b32e0c5a0b46bcdb4e50d1931c676f2f65503d0..b4f21232019a98c7e0afd9e5a43a5a160da765fe 100644 (file)
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -6081,7 +6081,7 @@ static void rtl_hw_start_8168h_1(struct rtl8169_private *tp)
 {
        void __iomem *ioaddr = tp->mmio_addr;
        struct pci_dev *pdev = tp->pci_dev;
-       u16 rg_saw_cnt;
+       int rg_saw_cnt;
        u32 data;
        static const struct ephy_info e_info_8168h_1[] = {
                { 0x1e, 0x0800, 0x0001 },