Comment # 3 on bug 1208750 from Jiri Slaby

> WARNING: CPU: 0 PID: 9 at drivers/firmware/efi/runtime-wrappers.c:113 efi_call_virt_check_flags+0x48/0xb0
> ...
> efi: [Firmware Bug]: IRQ flags corrupted (0x00000000=>0x000000c0) by EFI set_variable

which is:
        if (!WARN_ON_ONCE(mismatch & ARCH_EFI_IRQ_FLAGS_MASK))

invoked by:
> WARNING: CPU: 3 PID: 419 at drivers/firmware/efi/runtime-wrappers.c:341 virt_efi_set_variable+0x174/0x1b0
> ...
>  virt_efi_set_variable+0x174/0x1b0
>  refresh_nv_rng_seed+0x80/0xbc

0x000000c0 is irq_masked|fiq_masked.

I don't see any relevant changes between 6.0 and 6.1 for this to happen. Joey,
any ideas?

Olaf, can you bisect? I would start with git bisect drivers/firmware/efi/
rch/arm64/kernel/efi* which should be rather quick.