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

[irqchip-bot for William Dean]

The following commit has been merged into the irq/irqchip-next branch of irqchip:

Commit-ID:     71349cc85e5930dce78ed87084dee098eba24b59
Gitweb:        https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms/71349cc85e5930dce78ed87084dee098eba24b59
Author:        William Dean <williamsukatube@xxxxxxx>
AuthorDate:    Sat, 23 Jul 2022 18:01:28 +08:00
Committer:     Marc Zyngier <maz@xxxxxxxxxx>
CommitterDate: Sun, 24 Jul 2022 10:54:44 +01:00

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

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

Reported-by: Hacash Robot <hacashRobot@xxxxxxxxxxx>
Signed-off-by: William Dean <williamsukatube@xxxxxxx>
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220723100128.2964304-1-williamsukatube@xxxxxxx
---
 drivers/irqchip/irq-mips-gic.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/irqchip/irq-mips-gic.c b/drivers/irqchip/irq-mips-gic.c
index ff89b36..a1f6d95 100644
--- a/drivers/irqchip/irq-mips-gic.c
+++ b/drivers/irqchip/irq-mips-gic.c
@@ -734,6 +734,10 @@ 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 = FIELD_GET(GIC_CONFIG_NUMINTERRUPTS, gicconfig);