Re: [PATCH v6 02/10] irqchip/irq-msi-lib: Optionally set default irq_eoi/irq_ack

[Thomas Gleixner]

On Thu, Feb 20 2025 at 14:54, Thomas Gleixner wrote:
> On Wed, Feb 19 2025 at 14:41, Mark Brown wrote:
>> On Mon, Feb 17, 2025 at 02:26:48PM +0530, Anup Patel wrote:
>> I'm seeing boot regressions with qemu on arm64 in -next which bisect
>> down to this patch.  We hit a NULL pointer dereference:
>>
>> <6>[    0.898900] virtio_blk virtio1: 1/0/0 default/read/poll queues
>> <5>[    0.910197] virtio_blk virtio1: [vda] 3906250 512-byte logical blocks (2.00 GB/1.86 GiB)
>> <1>[    0.924459] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
>> <1>[    0.924508] Mem abort info:
>> <1>[    0.924521]   ESR = 0x000000008600002b
>> <1>[    0.924559]   EC = 0x21: IABT (current EL), IL = 32 bits
>> <1>[    0.924580]   SET = 0, FnV = 0
>> <1>[    0.924597]   EA = 0, S1PTW = 0
>> <1>[    0.924616]   FSC = 0x2b: level -1 translation fault
>> <1>[    0.924667] [0000000000000000] user address but active_mm is swapper
>> <0>[    0.924833] Internal error: Oops: 000000008600002b [#1] PREEMPT
>> SMP
>
> Uuurg. I wish I had double checked that the final submitted patch covers
> _ALL_ incarnations of this. The below delta patch should address it.

I'll redo the branch accordingly.

Thanks,

         tglx