[PATCH] ARM: EXYNOS: Handle of of_iomap() failure

[Krzysztof Kozlowski]

Prevent possible NULL pointer dereference if of_iomap() fails. Handle
the error by skipping such power domain.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski at samsung.com>
---
 arch/arm/mach-exynos/pm_domains.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm/mach-exynos/pm_domains.c b/arch/arm/mach-exynos/pm_domains.c
index 20f267121b3e..fd7640a6b503 100644
--- a/arch/arm/mach-exynos/pm_domains.c
+++ b/arch/arm/mach-exynos/pm_domains.c
@@ -128,6 +128,13 @@ static __init int exynos4_pm_init_power_domain(void)
 		pd->pd.name = kstrdup(np->name, GFP_KERNEL);
 		pd->name = pd->pd.name;
 		pd->base = of_iomap(np, 0);
+		if (!pd->base) {
+			dev_warn(&pdev->dev, "Failed to map memory\n");
+			kfree(pd);
+			of_node_put(np);
+			continue;
+		}
+
 		pd->pd.power_off = exynos_pd_power_off;
 		pd->pd.power_on = exynos_pd_power_on;
 
-- 
1.9.1