[S390] Fix sparse warnings.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index e36ca27f5777..89320c1ad825 100644
--- a/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@ -798,7 +798,7 @@ struct subchannel *
 cio_get_console_subchannel(void)
 {
         if (!console_subchannel_in_use)
-                return 0;
+                return NULL;
         return &console_subchannel;
 }