提交 36b31279 编写于 作者: A Andy Shevchenko 提交者: Linus Walleij

gpiolib: Respect error code of ->get_direction()

In case we try to lock GPIO pin as IRQ when something going wrong
we print a misleading message.

Correct this by checking an error code from ->get_direction() in
gpiochip_lock_as_irq() and printing a corresponding message.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
上级 f8b52dd5
......@@ -3262,6 +3262,12 @@ int gpiochip_lock_as_irq(struct gpio_chip *chip, unsigned int offset)
if (!chip->can_sleep && chip->get_direction) {
int dir = chip->get_direction(chip, offset);
if (dir < 0) {
chip_err(chip, "%s: cannot get GPIO direction\n",
__func__);
return dir;
}
if (dir)
clear_bit(FLAG_IS_OUT, &desc->flags);
else
......
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