1 files changed, 8 insertions, 6 deletions

diff --git a/drivers/s390/block/dasd_genhd.c b/drivers/s390/block/dasd_genhd.c
index 12c7d296eaa8..d163632101d2 100644
--- a/drivers/s390/block/dasd_genhd.c
+++ b/drivers/s390/block/dasd_genhd.c
@@ -83,10 +83,12 @@ dasd_gendisk_alloc(struct dasd_device *device)
 void
 dasd_gendisk_free(struct dasd_device *device)
 {
-        del_gendisk(device->gdp);
-        device->gdp->queue = 0;
-        put_disk(device->gdp);
-        device->gdp = 0;
+        if (device->gdp) {
+                del_gendisk(device->gdp);
+                device->gdp->queue = NULL;
+                put_disk(device->gdp);
+                device->gdp = NULL;
+        }
 }
 
 /*
@@ -136,7 +138,7 @@ dasd_destroy_partitions(struct dasd_device * device)
          * device->bdev to lower the offline open_count limit again.
          */
         bdev = device->bdev;
-        device->bdev = 0;
+        device->bdev = NULL;
 
         /*
          * See fs/partition/check.c:delete_partition
@@ -145,7 +147,7 @@ dasd_destroy_partitions(struct dasd_device * device)
          */
         memset(&bpart, 0, sizeof(struct blkpg_partition));
         memset(&barg, 0, sizeof(struct blkpg_ioctl_arg));
-        barg.data = &bpart;
+        barg.data = (void __user *) &bpart;
         barg.op = BLKPG_DEL_PARTITION;
         for (bpart.pno = device->gdp->minors - 1; bpart.pno > 0; bpart.pno--)
                 ioctl_by_bdev(bdev, BLKPG, (unsigned long) &barg);