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 f03f47ffea1e1c91b419eb53efd89ef24f98f72c..d815285f1efe3aae175b2b23170864de2ca4c6b8 100644 (file)
--- a/drivers/irqchip/irq-mips-gic.c
+++ b/drivers/irqchip/irq-mips-gic.c
@@ -767,6 +767,10 @@ 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;