[PATCH -next] powerpc/powernv: add NULL check after kzalloc

[Chen Zhou]

Fixes coccicheck warning:

./arch/powerpc/platforms/powernv/opal.c:813:1-5:
        alloc with no test, possible model on line 814

Add NULL check after kzalloc.

Signed-off-by: Chen Zhou <chenzho...@huawei.com>
---
 arch/powerpc/platforms/powernv/opal.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/powerpc/platforms/powernv/opal.c 
b/arch/powerpc/platforms/powernv/opal.c
index 2b3dfd0b6cdd..d95954ad4c0a 100644
--- a/arch/powerpc/platforms/powernv/opal.c
+++ b/arch/powerpc/platforms/powernv/opal.c
@@ -811,6 +811,10 @@ static int opal_add_one_export(struct kobject *parent, 
const char *export_name,
                goto out;
 
        attr = kzalloc(sizeof(*attr), GFP_KERNEL);
+       if (!attr) {
+               rc = -ENOMEM;
+               goto out;
+       }
        name = kstrdup(export_name, GFP_KERNEL);
        if (!name) {
                rc = -ENOMEM;
-- 
2.20.1