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Re: [PATCH for-4.19] x86/physdev: Return pirq that irq was already mapped to
- To: Jiqian Chen <Jiqian.Chen@xxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 8 Jul 2024 08:56:59 +0200
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>, Huang Rui <Ray.Huang@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Mon, 08 Jul 2024 06:57:11 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 08.07.2024 08:25, Jiqian Chen wrote:
> Fix bug imported by 0762e2502f1f ("x86/physdev: factor out the code to
> allocate and
Nit: Perhaps s/imported/introduced/ ?
> map a pirq"). After that re-factoring, when pirq<0 and current_pirq>0, it
> means
> caller want to allocate a free pirq for irq but irq already has a mapped
> pirq, then
> it returns the negative pirq, so it fails. However, the logic before that
> re-factoring is different, it should return the current_pirq that irq was
> already
> mapped to and make the call success.
>
> Fixes: 0762e2502f1f ("x86/physdev: factor out the code to allocate and map a
> pirq")
>
> Signed-off-by: Jiqian Chen <Jiqian.Chen@xxxxxxx>
> Signed-off-by: Huang Rui <ray.huang@xxxxxxx>
> Signed-off-by: Jiqian Chen <Jiqian.Chen@xxxxxxx>
Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
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