UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

MIPS: TXx9: Be sure to clamp return value 

As we want gpio_chip .get() calls to be able to return negative
error codes and propagate to drivers, we need to go over all
drivers and make sure their return values are clamped to [0,1].
We do this by using the ret = !!(val) design pattern.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Cc: linux-mips@linux-mips.org
Cc: linux-gpio@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/11923/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Linus Walleij 2015-12-22 15:41:01 +01:00 committed by Ralf Baechle
parent 249e573d99
commit 6ea6b7faf0
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/mips/kernel/gpio_txx9.c
View File

@ -21,7 +21,7 @@ static struct txx9_pio_reg __iomem *txx9_pioptr;
static int txx9_gpio_get(struct gpio_chip *chip, unsigned int offset)
{
return __raw_readl(&txx9_pioptr->din) & (1 << offset);
return !!(__raw_readl(&txx9_pioptr->din) & (1 << offset));
}
static void txx9_gpio_set_raw(unsigned int offset, int value)