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

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

On 4/3/24 17:37, Sven Schnelle wrote:
> 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.
> 
> Suggested-by: Peter Maydell <peter.maydell@linaro.org>
> Signed-off-by: Sven Schnelle <svens@stackframe.org>
> Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
> ---
>   hw/scsi/lsi53c895a.c | 43 +++++++++++++++++++++++++++++++++----------
>   hw/scsi/trace-events |  2 ++
>   2 files changed, 35 insertions(+), 10 deletions(-)

I suppose Paolo is going to take this patch, otherwise I can
queue it via hw-misc tree.