From: William Dean <williamsukatube@163.com>
Date: Sat, 23 Jul 2022 10:01:28 +0000 (+0800)
Subject: irqchip/mips-gic: Check the return value of ioremap() in gic_of_init()
X-Git-Tag: v5.10.137~457
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=2b8c55900d46369b7d280b669aad83dfa9e0ae7a;p=users%2Fdwmw2%2Flinux.git

irqchip/mips-gic: Check the return value of ioremap() in gic_of_init()

[ Upstream commit 71349cc85e5930dce78ed87084dee098eba24b59 ]

The function ioremap() in gic_of_init() can fail, so
its return value should be checked.

Reported-by: Hacash Robot <hacashRobot@santino.com>
Signed-off-by: William Dean <williamsukatube@163.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220723100128.2964304-1-williamsukatube@163.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/irqchip/irq-mips-gic.c b/drivers/irqchip/irq-mips-gic.c
index 8b08b31ea2baa..8ada91bdbe4d0 100644
--- a/drivers/irqchip/irq-mips-gic.c
+++ b/drivers/irqchip/irq-mips-gic.c
@@ -766,6 +766,10 @@ static int __init gic_of_init(struct device_node *node,
 	}
 
 	mips_gic_base = ioremap(gic_base, gic_len);
+	if (!mips_gic_base) {
+		pr_err("Failed to ioremap gic_base\n");
+		return -ENOMEM;
+	}
 
 	gicconfig = read_gic_config();
 	gic_shared_intrs = gicconfig & GIC_CONFIG_NUMINTERRUPTS;