From: Andy Shevchenko andriy.shevchenko@linux.intel.com
[ Upstream commit 993b9bc5c47fda86f8ab4e53d68c6fea5ff2764a ]
The commit ca876c7483b6
("gpiolib-acpi: make sure we trigger edge events at least once on boot")
added a initial value check for pin which is about to be locked as IRQ. Unfortunately, not all GPIO drivers can do that atomically. Thus, switch to cansleep version of the call. Otherwise we have a warning:
... WARNING: CPU: 2 PID: 1408 at drivers/gpio/gpiolib.c:2883 gpiod_get_value+0x46/0x50 ... RIP: 0010:gpiod_get_value+0x46/0x50 ...
The change tested on Intel Broxton with Whiskey Cove PMIC GPIO controller.
Fixes: ca876c7483b6 ("gpiolib-acpi: make sure we trigger edge events at least once on boot") Signed-off-by: Andy Shevchenko andriy.shevchenko@linux.intel.com Cc: Hans de Goede hdegoede@redhat.com Cc: Benjamin Tissoires benjamin.tissoires@redhat.com Acked-by: 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 --- drivers/gpio/gpiolib-acpi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c index 70b3c556f6cf..582dde355bde 100644 --- a/drivers/gpio/gpiolib-acpi.c +++ b/drivers/gpio/gpiolib-acpi.c @@ -247,7 +247,7 @@ static acpi_status acpi_gpiochip_request_interrupt(struct acpi_resource *ares,
gpiod_direction_input(desc);
- value = gpiod_get_value(desc); + value = gpiod_get_value_cansleep(desc);
ret = gpiochip_lock_as_irq(chip, pin); if (ret) {