From e434ddd1da70d58704914b1bb336f86298a62dfc Mon Sep 17 00:00:00 2001
From: Zenghui Yu <yuzenghui@huawei.com>
Date: Wed, 27 Mar 2024 22:23:05 +0800
Subject: [PATCH] irqchip/alpine-msi: Fix off-by-one in allocation error path
[ 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 fc1ef7de3797..c9ffd69dfc75 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;
}