Hello Marc,
Quoting Marc Zyngier (2020-11-29 14:55:25)
> The alpine-msi driver has an interesting allocation error handling,
> where it frees the same interrupts repeatedly. Hilarity follows.
That's interesting indeed...
> This code is probably never executed, but let's fix it nonetheless.
>
> Fixes: e6b78f2c3e14 ("irqchip: Add the Alpine MSIX interrupt controller")
> Cc: Tsahee Zidenberg <tsa...@annapurnalabs.com>
> Cc: Antoine Tenart <aten...@kernel.org>
> Signed-off-by: Marc Zyngier <m...@kernel.org>
Reviewed-by: Antoine Tenart <aten...@kernel.org>
Thanks,
Antoine
> ---
> drivers/irqchip/irq-alpine-msi.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/irqchip/irq-alpine-msi.c
> b/drivers/irqchip/irq-alpine-msi.c
> index 23a3b877f7f1..ede02dc2bcd0 100644
> --- a/drivers/irqchip/irq-alpine-msi.c
> +++ b/drivers/irqchip/irq-alpine-msi.c
> @@ -165,8 +165,7 @@ static int alpine_msix_middle_domain_alloc(struct
> irq_domain *domain,
> return 0;
>
> err_sgi:
> - while (--i >= 0)
> - irq_domain_free_irqs_parent(domain, virq, i);
> + irq_domain_free_irqs_parent(domain, virq, i - 1);
> alpine_msix_free_sgi(priv, sgi, nr_irqs);
> return err;
> }
> --
> 2.29.2
>
