Re: [PATCH v2] gpio: pl061: Fix the issue failed to register the ACPI interrtupion

[Andy Shevchenko]

On Fri, Aug 16, 2019 at 12:07 PM Wei Xu <xuwei5@xxxxxxxxxxxxx> wrote:
>
> Invoke acpi_gpiochip_request_interrupts after the acpi data has been
> attached to the pl061 acpi node to register interruption.
>
> Otherwise it will be failed to register interruption for the ACPI case.
> Because in the gpiochip_add_data_with_key, acpi_gpiochip_add is invoked
> after gpiochip_add_irqchip but at that time the acpi data has not been
> attached yet.

> 2. cat /proc/interrupts in the guest console:
>
>         estuary:/$ cat /proc/interrupts
>                    CPU0
>         2:         3228     GICv3  27 Level     arch_timer
>         4:           15     GICv3  33 Level     uart-pl011
>         42:           0     GICv3  23 Level     arm-pmu
>         IPI0:         0       Rescheduling interrupts
>         IPI1:         0       Function call interrupts
>         IPI2:         0       CPU stop interrupts
>         IPI3:         0       CPU stop (for crash dump) interrupts
>         IPI4:         0       Timer broadcast interrupts
>         IPI5:         0       IRQ work interrupts
>         IPI6:         0       CPU wake-up interrupts
>         Err:          0
>
> But on QEMU v3.0.0 and Linux kernel v5.2.0-rc7, pl061 interruption is
> there as below:
>
>         estuary:/$ cat /proc/interrupts
>                    CPU0
>           2:       2648     GICv3  27 Level     arch_timer
>           4:         12     GICv3  33 Level     uart-pl011
>          42:          0     GICv3  23 Level     arm-pmu
>          43:          0  ARMH0061:00   3 Edge      ACPI:Event
>         IPI0:         0       Rescheduling interrupts
>         IPI1:         0       Function call interrupts
>         IPI2:         0       CPU stop interrupts
>         IPI3:         0       CPU stop (for crash dump) interrupts
>         IPI4:         0       Timer broadcast interrupts
>         IPI5:         0       IRQ work interrupts
>         IPI6:         0       CPU wake-up interrupts
>         Err:          0

In above show only affected line.

> And the whole dmesg log on Linux kernel v5.2.0-rc7 is as below:

NO!
Please, remove this huge noise!

-- 
With Best Regards,
Andy Shevchenko