4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Andy Shevchenko andriy.shevchenko@linux.intel.com
[ Upstream commit 36b312792b97933dc07abe074f50941199bd357c ]
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: Andy Shevchenko andriy.shevchenko@linux.intel.com Cc: Mika Westerberg mika.westerberg@linux.intel.com Signed-off-by: Linus Walleij linus.walleij@linaro.org Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpio/gpiolib.c | 6 ++++++ 1 file changed, 6 insertions(+)
--- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -2749,6 +2749,12 @@ int gpiochip_lock_as_irq(struct gpio_chi 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