diff options
| author | John Crispin <blogic@openwrt.org> | 2012-07-11 16:33:43 +0200 |
|---|---|---|
| committer | John Crispin <blogic@openwrt.org> | 2012-09-13 10:31:00 +0200 |
| commit | c9e854cf940fbc09846c255895efceb3bc9bf095 (patch) | |
| tree | e56a5460f02e9c415d10ffa718d5d78d062f4b82 /drivers | |
| parent | 6a88a0f762a61f212d4bbcf1ad45369f28014484 (diff) | |
| download | linux-c9e854cf940fbc09846c255895efceb3bc9bf095.tar.gz linux-c9e854cf940fbc09846c255895efceb3bc9bf095.tar.bz2 linux-c9e854cf940fbc09846c255895efceb3bc9bf095.zip | |
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 <blogic@openwrt.org>
Cc: linux-kernel@vger.kernel.org
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpio/gpio-stp-xway.c | 2 |
1 files changed, 1 insertions, 1 deletions
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 */ |