[S390] add missing device put

The dasd_alias_show function does not return a device reference
in case the device is an alias.

Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c
index 34d51dd4c539..bed7b4634ccd 100644
--- a/drivers/s390/block/dasd_devmap.c
+++ b/drivers/s390/block/dasd_devmap.c
@@ -948,8 +948,10 @@ static ssize_t dasd_alias_show(struct device *dev,
         if (device->discipline && device->discipline->get_uid &&
             !device->discipline->get_uid(device, &uid)) {
                 if (uid.type == UA_BASE_PAV_ALIAS ||
-                    uid.type == UA_HYPER_PAV_ALIAS)
+                    uid.type == UA_HYPER_PAV_ALIAS) {
+                        dasd_put_device(device);
                         return sprintf(buf, "1\n");
+                }
         }
         dasd_put_device(device);