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Re: [PATCH] ns1650: refactor interrupt handling in ns16550_uart_dt_init()
- To: Oleksii <oleksii.kurochko@xxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 13 Jul 2023 16:26:29 +0200
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, Julien Grall <julien@xxxxxxx>
- Delivery-date: Thu, 13 Jul 2023 14:26:45 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 13.07.2023 15:36, Oleksii wrote:
> On Thu, 2023-07-13 at 15:27 +0200, Jan Beulich wrote:
>> I don't understand. My earlier comment was affecting all checks of
>> uart->irq alike, as I'm unconvinced IRQ0 may not possibly be usable
>> on some architecture / platform. IOW I don't see why the check in
>> ns16550_init_postirq() would allow us any leeway.
> It looks like I misunderstood you.
>
> Do you mean that on some architecture IRQ0 may be used for ns16550?
Yes, I don't see why this shouldn't be possible in principle. As Julien
said it can't happen on Arm, so if it also can't happen on RISC-V and
PPC, we could elect to continue to ignore that aspect.
Jan
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