[syzbot] riscv/fixes test error: can't ssh into the instance (2)

[Arnd Bergmann]

On Mon, May 19, 2025, at 18:35, Alexandre Ghiti wrote:
> On 5/19/25 12:12, syzbot wrote:
>
> Because we don't have acpi enabled and then acpi_kobj is null 
> (https://elixir.bootlin.com/linux/v6.15-rc6/source/fs/sysfs/group.c#L131).
>
> The following patch fixes it, but not sure this is the right way, let me 
> know if I should send it, it would be nice to have it in 6.15:
>

> --- a/drivers/acpi/platform_profile.c
> +++ b/drivers/acpi/platform_profile.c
> @@ -688,6 +688,9 @@ static int __init platform_profile_init(void)
>   {
>          int err;
>
> +       if (acpi_disabled)
> +               return -ENOTSUPP;
> +
>          err = class_register(&platform_profile_class);
>          if (err)

The change makes sense to me.

I double-checked that returning an error from the initcall
causes no problems, but it is only used for printing it with trace_initcall_finish_cb().

As far as I can tell, the problem has existed in theory since
linux-6.14, when the sysfs_create_group() call was moved
from platform_profile_register() to the module_init call.

Maybe clarify this and add

Fixes: 77be5cacb2c2 ("ACPI: platform_profile: Create class for ACPI platform profile")

      Arnd