[PATCH 6.1 113/473] irqchip/alpine-msi: Fix off-by-one in allocation error path

Greg Kroah-Hartman
2024-06-06T14:13:55Z

From: Zenghui Yu <yuzenghui@huawei.com>

[ Upstream commit ff3669a71afa06208de58d6bea1cc49d5e3fcbd1 ]

When alpine_msix_gic_domain_alloc() fails, there is an off-by-one in the
number of interrupts to be freed.

Fix it by passing the number of successfully allocated interrupts, instead
of the relative index of the last allocated one.

Fixes: 3841245e8498 ("irqchip/alpine-msi: Fix freeing of interrupts on allocation error path")
Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20240327142305.1048-1-yuzenghui@huawei.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/irqchip/irq-alpine-msi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-alpine-msi.c b/drivers/irqchip/irq-alpine-msi.c
index fc1ef7de37973..c9ffd69dfc756 100644
--- a/drivers/irqchip/irq-alpine-msi.c
+++ b/drivers/irqchip/irq-alpine-msi.c
@@ -165,7 +165,7 @@ static int alpine_msix_middle_domain_alloc(struct irq_domain *domain,
return 0;

err_sgi:
- irq_domain_free_irqs_parent(domain, virq, i - 1);
+ irq_domain_free_irqs_parent(domain, virq, i);
alpine_msix_free_sgi(priv, sgi, nr_irqs);
return err;
}
--
2.43.0