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r8169: prevent bit sign expansion error in mdio_write 

Oops.

The current code does not like being given an u16 with the highest
bit set as an argument to mdio_write. Let's enforce a correct range of
values for both the register address and value (resp. 5 and 16 bits).

The callers are currently left as-is.

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Cc: Edward Hsu <edward_hsu@realtek.com.tw>
This commit is contained in:
Francois Romieu 2007-11-08 23:23:21 +01:00 committed by Jeff Garzik
parent 50d84c2dc0
commit a6baf3af89
1 changed files with 3 additions and 3 deletions
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6
drivers/net/r8169.c
View File

@ -470,7 +470,7 @@ static void mdio_write(void __iomem *ioaddr, int reg_addr, int value)
{
int i;
RTL_W32(PHYAR, 0x80000000 | (reg_addr & 0xFF) << 16 | value);
RTL_W32(PHYAR, 0x80000000 | (reg_addr & 0x1f) << 16 | (value & 0xffff));
for (i = 20; i > 0; i--) {
/*
@ -487,7 +487,7 @@ static int mdio_read(void __iomem *ioaddr, int reg_addr)
{
int i, value = -1;
RTL_W32(PHYAR, 0x0 | (reg_addr & 0xFF) << 16);
RTL_W32(PHYAR, 0x0 | (reg_addr & 0x1f) << 16);
for (i = 20; i > 0; i--) {
/*
@ -495,7 +495,7 @@ static int mdio_read(void __iomem *ioaddr, int reg_addr)
* the specified MII register.
*/
if (RTL_R32(PHYAR) & 0x80000000) {
value = (int) (RTL_R32(PHYAR) & 0xFFFF);
value = RTL_R32(PHYAR) & 0xffff;
break;
}
udelay(25);