bsg: add cheasy error checks for sysfs stuff

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 10 insertions, 1 deletions

diff --git a/block/bsg.c b/block/bsg.c
index c56618ae54c3..e97e3ec08ffc 100644
--- a/block/bsg.c
+++ b/block/bsg.c
@@ -983,10 +983,19 @@ int bsg_register_disk(struct gendisk *disk)
         bsg_device_nr++;
         bcd->disk = disk;
         bcd->class_dev = class_device_create(bsg_class, NULL, dev, bcd->dev, "%s", disk->disk_name);
+        if (!bcd->class_dev)
+                goto err;
         list_add_tail(&bcd->list, &bsg_class_list);
-        sysfs_create_link(&q->kobj, &bcd->class_dev->kobj, "bsg");
+        if (sysfs_create_link(&q->kobj, &bcd->class_dev->kobj, "bsg"))
+                goto err;
         mutex_unlock(&bsg_mutex);
         return 0;
+err:
+        bsg_device_nr--;
+        if (bcd->class_dev)
+                class_device_destroy(bsg_class, MKDEV(BSG_MAJOR, bcd->minor));
+        mutex_unlock(&bsg_mutex);
+        return -ENOMEM;
 }
 
 static int __init bsg_init(void)