powerpc/pseries/cmm: Report errors when registering notifiers fails

If we don't set the rc, we will return "0", making it look like we
succeeded.

Signed-off-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20191031142933.10779-3-david@redhat.com

diff --git a/arch/powerpc/platforms/pseries/cmm.c b/arch/powerpc/platforms/pseries/cmm.c
index 572651a..fab049d 100644 (file)
--- a/arch/powerpc/platforms/pseries/cmm.c
+++ b/arch/powerpc/platforms/pseries/cmm.c
@@ -683,8 +683,12 @@ static int cmm_init(void)
        if ((rc = cmm_sysfs_register(&cmm_dev)))
                goto out_reboot_notifier;
 
-       if (register_memory_notifier(&cmm_mem_nb) ||
-           register_memory_isolate_notifier(&cmm_mem_isolate_nb))
+       rc = register_memory_notifier(&cmm_mem_nb);
+       if (rc)
+               goto out_unregister_notifier;
+
+       rc = register_memory_isolate_notifier(&cmm_mem_isolate_nb);
+       if (rc)
                goto out_unregister_notifier;
 
        if (cmm_disabled)