Re: [PATCH v3] hw/scsi/lsi53c895a: add timer to scripts processing

[Michael Tokarev]

04.03.2024 19:37, Sven Schnelle :
> HP-UX 10.20 seems to make the lsi53c895a spinning on a memory location
> under certain circumstances. As the SCSI controller and CPU are not
> running at the same time this loop will never finish. After some
> time, the check loop interrupts with a unexpected device disconnect.
> This works, but is slow because the kernel resets the scsi controller.
> Instead of signaling UDC, start a timer and exit the loop. Until the
> timer fires, the CPU can process instructions which might change the
> memory location.
>
> The limit of instructions is also reduced because scripts running on
> the SCSI processor are usually very short. This keeps the time until
> the loop is exited short.

This one is a bit large(ish), yet, - is it okay for -stable?  From the
description it feels like it should be picked up, and it applies cleanly
to 7.2.x too (after picking up the forgotten 8b09b7fe47082c692
"hw/scsi/lsi53c895a: add missing decrement of reentrancy counter" there).

Thanks,

/mjt