[PATCH 2/2] powerpc/powernv/pci: Fix underflow and leak issue

[Cédric Le Goater]

On 8/4/25 12:07, Nam Cao wrote:
> pnv_irq_domain_alloc() allocates interrupts at parent's interrupt
> domain. If it fails in the progress, all allocated interrupts are
> freed.
> 
> The number of successfully allocated interrupts so far is stored
> "i". However, "i - 1" interrupts are freed. This is broken:
> 
>      - One interrupt is not be freed
> 
>      - If "i" is zero, "i - 1" wraps around
> 
> Correct the number of freed interrupts to "i".
> 
> Fixes: 0fcfe2247e75 ("powerpc/powernv/pci: Add MSI domains")
> Signed-off-by: Nam Cao <namcao at linutronix.de>
> Cc: stable at vger.kernel.org
> ---
>   arch/powerpc/platforms/powernv/pci-ioda.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)

Reviewed-by: Cédric Le Goater <clg at redhat.com>

Thanks,

C.