pseries_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: a5f3d2c17b07 ("powerpc/pseries/pci: Add MSI domains") Signed-off-by: Nam Cao namcao@linutronix.de Cc: stable@vger.kernel.org --- arch/powerpc/platforms/pseries/msi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/pseries/msi.c b/arch/powerpc/platforms/pseries/msi.c index ee1c8c6898a3..9dc294de631f 100644 --- a/arch/powerpc/platforms/pseries/msi.c +++ b/arch/powerpc/platforms/pseries/msi.c @@ -593,7 +593,7 @@ static int pseries_irq_domain_alloc(struct irq_domain *domain, unsigned int virq

out: /* TODO: handle RTAS cleanup in ->msi_finish() ? */ - irq_domain_free_irqs_parent(domain, virq, i - 1); + irq_domain_free_irqs_parent(domain, virq, i); return ret; }