GPIO fixes for the v5.0 series:
- Fix timestamps on nested IRQs
- Handle IRQs properly in multiple instances of PCF857x
- Use the right data register and IRQ type setting in the
  Spreadtrum GPIO driver
- Let the value argument work properly when setting direction
  in the Altera GPIO driver
- Mask interrupts properly in the vf610 driver
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gpio: vf610: Mask all GPIO interrupts

On SoC reset all GPIO interrupts are disable. However, if kexec is
used to boot into a new kernel, the SoC does not experience a
reset. Hence GPIO interrupts can be left enabled from the previous
kernel. It is then possible for the interrupt to fire before an
interrupt handler is registered, resulting in the kernel complaining
of an "unexpected IRQ trap", the interrupt is never cleared, and so
fires again, resulting in an interrupt storm.

Disable all GPIO interrupts before registering the GPIO IRQ chip.

Fixes: 7f2691a19627 ("gpio: vf610: add gpiolib/IRQ chip driver for Vybrid")
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
1 file changed