From: John Crispin Date: Wed, 11 Jul 2012 14:33:43 +0000 (+0200) Subject: GPIO: MIPS: lantiq: fix overflow inside stp-xway driver X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=c9e854cf940fbc09846c255895efceb3bc9bf095;p=deliverable%2Flinux.git GPIO: MIPS: lantiq: fix overflow inside stp-xway driver The driver was using a 16 bit field for storing the shadow value of the shift register cascade. This resulted in only the first 2 shift registeres receiving the correct data. The third shift register would always receive 0x00. Fix this by using a 32bit field for the shadow value. Signed-off-by: John Crispin Cc: linux-kernel@vger.kernel.org --- diff --git a/drivers/gpio/gpio-stp-xway.c b/drivers/gpio/gpio-stp-xway.c index e35096bf3cfb..8bead0bb6459 100644 --- a/drivers/gpio/gpio-stp-xway.c +++ b/drivers/gpio/gpio-stp-xway.c @@ -82,7 +82,7 @@ struct xway_stp { struct gpio_chip gc; void __iomem *virt; u32 edge; /* rising or falling edge triggered shift register */ - u16 shadow; /* shadow the shift registers state */ + u32 shadow; /* shadow the shift registers state */ u8 groups; /* we can drive 1-3 groups of 8bit each */ u8 dsl; /* the 2 LSBs can be driven by the dsl core */ u8 phy1; /* 3 bits can be driven by phy1 */