On Tue, Oct 11, 2016 at 10:38:27AM +0800, AceLan Kao wrote:

quoted

Hi Mika,

BTW, I failed to compile the kernel 4.4 with the patch.

The patch uses gpiochip_line_is_irq() function which has been
introduced since 4.6-rc1, so we need to cherry pick this commit, too.
   6cee382 gpio/pinctrl: sunxi: stop poking around in private vars

But the above commit uses gpiodev data member in struct gpio_chip
which is introduced from this commit, and it's a big commit that can't
be cherry-picked clearly.
   ff2b135 gpio: make the gpiochip a real device

Will you provide other patch that can apply on top of old stable kernels?

Hmm,

So 6cee382 ("gpio/pinctrl: sunxi: stop poking around in private vars")
needs the following patch.

I can backport 6cee382 with the below patch and send both patches to
stable@ after this gets merged to mainline but not sure if that's the
correct process to follow.

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index db007a3e2af7..6240dd40e8be 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c

@@ -1524,7 +1524,7 @@ bool gpiochip_line_is_irq(struct gpio_chip *chip, unsigned int offset)
        if (offset >= chip->ngpio)
                return false;

-       return test_bit(FLAG_USED_AS_IRQ, &chip->gpiodev->descs[offset].flags);
+       return test_bit(FLAG_USED_AS_IRQ, &chip->desc[offset].flags);
 }
 EXPORT_SYMBOL_GPL(gpiochip_line_is_irq);