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authorGeert Uytterhoeven <geert+renesas@glider.be>2016-05-04 10:21:53 +0200
committerLinus Walleij <linus.walleij@linaro.org>2016-05-11 13:28:48 +0200
commit9697643ff3edca036e8843235cd6e4d598a50e63 (patch)
treeeb5831bec139e2bfc81b06ead518fca0d914be2a /drivers
parent1b0d5287dafc7651af1d55cf47209209f79a964b (diff)
pinctrl: sh-pfc: Let gpio_chip.to_irq() return zero on error
Currrently the gpio_chip.to_irq() callback returns -ENOSYS on error, which causes bad interactions with the serial_mctrl_gpio helpers. mctrl_gpio_init() returns -ENOSYS if GPIOLIB is not enabled, which is intended to be ignored by its callers. However, ignoring -ENOSYS when it was caused by a gpiod_to_irq() failure will lead to a crash later: Unable to handle kernel paging request at virtual address ffffffde ... PC is at mctrl_gpio_set+0x14/0x78 Fix this by returning zero instead, like gpiochip_to_irq() does. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/pinctrl/sh-pfc/gpio.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pinctrl/sh-pfc/gpio.c b/drivers/pinctrl/sh-pfc/gpio.c
index a6681b8b17c3..97dff6a09ff0 100644
--- a/drivers/pinctrl/sh-pfc/gpio.c
+++ b/drivers/pinctrl/sh-pfc/gpio.c
@@ -212,7 +212,7 @@ static int gpio_pin_to_irq(struct gpio_chip *gc, unsigned offset)
}
}
- return -ENOSYS;
+ return 0;
found:
return pfc->irqs[i];

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