On Wed, 2021-03-31 at 15:29 +0300, Andy Shevchenko wrote:

On Wed, Mar 31, 2021 at 2:37 PM Matthias Schiffer
[off-list ref] wrote:

quoted

The tqmx86 MFD driver was passing IRQ 0 for "no IRQ" in the past. This
causes warnings with newer kernels.

Prepare the gpio-tqmx86 driver for the fixed MFD driver by handling a
missing IRQ properly.

...

quoted

-       irq = platform_get_irq(pdev, 0);
-       if (irq < 0)
+       irq = platform_get_irq_optional(pdev, 0);
+       if (irq < 0 && irq != -ENXIO)
                return irq;

This is a dead code now. I suggest you to do the opposite, i.e.
if (irq < 0)
  irq = 0;

I don't understand which part of the code is dead now. I assume the
`return irq` case is still useful for unexpected errors, or things like
EPROBE_DEFER? I'm not sure if EPROBE_DEFER is relevant for this driver,
but just ignoring the error code completely doesn't seem right to me.

In such a case below change is not required.

...

quoted

-       if (irq) {
+       if (irq > 0) {
                struct irq_chip *irq_chip = &gpio->irq_chip;
                u8 irq_status;