[Bug 216230] "irq9: nobody cared" on Thinkpad T14 Gen1 (AMD) when s2idle is enabled

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=216230

--- Comment #17 from madcatx@atlas.cz ---
My output from /sys/kernel/debug/dynamic_debug/control lists pinctrl_amd like
this

drivers/pinctrl/pinctrl-amd.c:1056 [pinctrl_amd]amd_gpio_probe =p "amd gpio
driver loaded\012"
drivers/pinctrl/pinctrl-amd.c:655 [pinctrl_amd]do_amd_gpio_irq_handler =p
"Disabling spurious GPIO IRQ %d\012"
drivers/pinctrl/pinctrl-amd.c:632 [pinctrl_amd]do_amd_gpio_irq_handler =p
"Waking due to GPIO %d: 0x%x"

IIRC this means that those debugging statements are enabled. The only relevant
line from dmesg is this though:

[    0.668575] amd_gpio AMDI0030:00: amd gpio driver loaded

I just noticed another case where the number of interrupts reached about 12000.
With a bit of careful optimism I think that loading pinctrl_amd early during
boot puts an early stop to the IRQ storm before the kernel intervenes and
disables the interrupt channel.

As for reproducibility, I think that the machine needs to run for some time
before the problem can be "re-reproduced". This is why it looked like it was
happening only on cold boots. Assuming there an EC connected to these GPIOs I
guess it's some kind of timer overflow...?

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