drbd: add error handling support for add_disk()

We never checked for errors on add_disk() as this function
returned void. Now that this is fixed, use the shiny new
error handling.

Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 55234a558e98b7afa90ec9f52d243dce16d68c5f..19db80a1e409284bdddae7bd544a215a0ded64de 100644 (file)
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -2794,7 +2794,9 @@ enum drbd_ret_code drbd_create_device(struct drbd_config_context *adm_ctx, unsig
                goto out_idr_remove_vol;
        }
 
-       add_disk(disk);
+       err = add_disk(disk);
+       if (err)
+               goto out_cleanup_disk;
 
        /* inherit the connection state */
        device->state.conn = first_connection(resource)->cstate;
@@ -2808,6 +2810,8 @@ enum drbd_ret_code drbd_create_device(struct drbd_config_context *adm_ctx, unsig
        drbd_debugfs_device_add(device);
        return NO_ERROR;
 
+out_cleanup_disk:
+       blk_cleanup_disk(disk);
 out_idr_remove_vol:
        idr_remove(&connection->peer_devices, vnr);
 out_idr_remove_from_resource: