From: Alex Elder Date: Thu, 30 Aug 2012 05:16:38 +0000 (-0500) Subject: rbd: don't register snapshots in bus_add_dev() X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=cd789ab9cacbda1aad43304b89cff29004b793ea;p=linux-beck.git rbd: don't register snapshots in bus_add_dev() When rbd_bus_add_dev() is called (one spot--in rbd_add()), the rbd image header has not even been read yet. This means that the list of snapshots will be empty at the time of the call. As a result, there is no need for the code that calls rbd_register_snap_dev() for each entry in that list--so get rid of it. Once the header has been read (just after returning), a call will be made to rbd_dev_snap_devs_update(), which will then find every snapshot in the context to be new and will therefore call rbd_register_snap_dev() via __rbd_add_snap_dev() accomplishing the same thing. Signed-off-by: Alex Elder Reviewed-by: Josh Durgin --- diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 214c937a6de5..144694ee03a5 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -2244,29 +2244,21 @@ static int rbd_dev_snap_devs_update(struct rbd_device *rbd_dev) static int rbd_bus_add_dev(struct rbd_device *rbd_dev) { - int ret; struct device *dev; - struct rbd_snap *snap; + int ret; mutex_lock_nested(&ctl_mutex, SINGLE_DEPTH_NESTING); - dev = &rbd_dev->dev; + dev = &rbd_dev->dev; dev->bus = &rbd_bus_type; dev->type = &rbd_device_type; dev->parent = &rbd_root_dev; dev->release = rbd_dev_release; dev_set_name(dev, "%d", rbd_dev->dev_id); ret = device_register(dev); - if (ret < 0) - goto out; - list_for_each_entry(snap, &rbd_dev->snaps, node) { - ret = rbd_register_snap_dev(snap, &rbd_dev->dev); - if (ret < 0) - break; - } -out: mutex_unlock(&ctl_mutex); + return ret; }