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authorLinus Walleij <linus.walleij@linaro.org>2015-12-21 22:42:59 +0100
committerLinus Walleij <linus.walleij@linaro.org>2016-01-25 18:02:26 +0100
commite847396b40d07931f5d2835f73220e16a1a413b3 (patch)
treea775a6e8be7ebeebd7c54883d1ed003a2c754c46 /drivers/soc
parenteecdf59ad2fb90d8238a42e2ec41f165964349bb (diff)
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op-kernel-dev-e847396b40d07931f5d2835f73220e16a1a413b3.tar.gz
powerpc: qe_lib/gpio: 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. Cc: Anatolij Gustschin <agust@denx.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/soc')
-rw-r--r--drivers/soc/fsl/qe/gpio.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/soc/fsl/qe/gpio.c b/drivers/soc/fsl/qe/gpio.c
index aa5c11ac..6584571 100644
--- a/drivers/soc/fsl/qe/gpio.c
+++ b/drivers/soc/fsl/qe/gpio.c
@@ -63,7 +63,7 @@ static int qe_gpio_get(struct gpio_chip *gc, unsigned int gpio)
struct qe_pio_regs __iomem *regs = mm_gc->regs;
u32 pin_mask = 1 << (QE_PIO_PINS - 1 - gpio);
- return in_be32(&regs->cpdata) & pin_mask;
+ return !!(in_be32(&regs->cpdata) & pin_mask);
}
static void qe_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
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