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-rw-r--r--drivers/s390/block/dcssblk.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index 01fcdd91b84..db85f1fb131 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -384,6 +384,10 @@ dcssblk_add_store(struct device *dev, struct device_attribute *attr, const char
* get minor, add to list
*/
down_write(&dcssblk_devices_sem);
+ if (dcssblk_get_segment_by_name(local_buf)) {
+ rc = -EEXIST;
+ goto release_gd;
+ }
rc = dcssblk_assign_free_minor(dev_info);
if (rc) {
up_write(&dcssblk_devices_sem);