powerpc/powernv: add NULL check after kzalloc

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 <chenzhou10@huawei.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200509020838.121660-1-chenzhou10@huawei.com

diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c
index 2b3dfd0b6cdd8109057c2150f7b84e3fa6d1f724..d95954ad4c0af5db5cd3b8be410015198703fc89 100644 (file)
--- 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;