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@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

diff --git a/drivers/irqchip/irq-mips-gic.c b/drivers/irqchip/irq-mips-gic.c
index ff89b36267dd4955e2a1a25184edb0daaf944e73..a1f6d955794aa095ba1d617bb18deb7fb1c26f34 100644 (file)
--- 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);