From: Francois Romieu Date: Thu, 8 Nov 2007 22:23:21 +0000 (+0100) Subject: r8169: prevent bit sign expansion error in mdio_write X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a6baf3af89a266a3d745117de570788b956396e7;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git 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 Cc: Edward Hsu --- diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c index f9ba2e478a69..1f647b9ce352 100644 --- a/drivers/net/r8169.c +++ b/drivers/net/r8169.c @@ -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);