[PATCH] coherency.c: fix missing return value check of kzalloc()

Function armada_375_380_coherency_init() defined in arch/arm/mach-mvebu/coherency.c calls kzalloc() to allocate memory for struct property which is dereferenced immediately. As kzalloc() may return NULL on failure, this code piece may cause NULL pointer dereference bug.
---
 arch/arm/mach-mvebu/coherency.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/mach-mvebu/coherency.c b/arch/arm/mach-mvebu/coherency.c
index 8f8748a..d3bc8a6 100644
--- a/arch/arm/mach-mvebu/coherency.c
+++ b/arch/arm/mach-mvebu/coherency.c

@@ -194,6 +194,8 @@ static void __init armada_375_380_coherency_init(struct device_node *np)
 		struct property *p;
 
 		p = kzalloc(sizeof(*p), GFP_KERNEL);
+		if (!p)
+			return;
 		p->name = kstrdup("arm,io-coherent", GFP_KERNEL);
 		of_add_property(cache_dn, p);
 	}

-- 
2.6.4