diff options
| author |   Alex Elder <elder@dreamhost.com> | 2012-02-02 08:13:30 -0600 |
|---|---|---|
| committer | Alex Elder <elder@dreamhost.com> | 2012-03-22 10:47:48 -0500 |
| commit | 27cc25943fb359241546e7bb7a3ab1c2f35796a2 (patch) | |
| tree | b5b957d4732a9fc3cc4b9eff33344eb5faabde2e /drivers/block | |
| parent | rbd: reduce memory used for rbd_dev fields (diff) | |
| download | linux-dev-27cc25943fb359241546e7bb7a3ab1c2f35796a2.tar.xz linux-dev-27cc25943fb359241546e7bb7a3ab1c2f35796a2.zip | |
rbd: simplify error handling in rbd_add()
If a couple pointers are initialized to NULL then a single
"out_nomem" label can be used for all of the memory allocation
failure cases in rbd_add().
Also, get rid of the "irc" local variable there. There is no
real need for "rc" to be type ssize_t, and it can be used in
the spot "irc" was.
Signed-off-by: Alex Elder <elder@dreamhost.com>
Signed-off-by: Sage Weil <sage@newdream.net>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/rbd.c | 40 |
1 files changed, 17 insertions, 23 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 606d59aece2b..8ac26ab09aa0 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -2224,28 +2224,24 @@ static ssize_t rbd_add(struct bus_type *bus, const char *buf, size_t count) { - struct ceph_osd_client *osdc; struct rbd_device *rbd_dev; - ssize_t rc = -ENOMEM; - int irc; - char *mon_dev_name; - char *options; + char *mon_dev_name = NULL; + char *options = NULL; + struct ceph_osd_client *osdc; + int rc = -ENOMEM; if (!try_module_get(THIS_MODULE)) return -ENODEV; + rbd_dev = kzalloc(sizeof(*rbd_dev), GFP_KERNEL); + if (!rbd_dev) + goto err_nomem; mon_dev_name = kmalloc(count, GFP_KERNEL); if (!mon_dev_name) - goto err_out_mod; - + goto err_nomem; options = kmalloc(count, GFP_KERNEL); if (!options) - goto err_mon_dev; - - /* new rbd_device object */ - rbd_dev = kzalloc(sizeof(*rbd_dev), GFP_KERNEL); - if (!rbd_dev) - goto err_out_opt; + goto err_nomem; /* static rbd_device initialization */ spin_lock_init(&rbd_dev->lock); @@ -2294,12 +2290,10 @@ static ssize_t rbd_add(struct bus_type *bus, rbd_dev->poolid = rc; /* register our block device */ - irc = register_blkdev(0, rbd_dev->name); - if (irc < 0) { - rc = irc; + rc = register_blkdev(0, rbd_dev->name); + if (rc < 0) goto err_out_client; - } - rbd_dev->major = irc; + rbd_dev->major = rc; rc = rbd_bus_add_dev(rbd_dev); if (rc) @@ -2332,15 +2326,15 @@ err_out_client: rbd_put_client(rbd_dev); err_put_id: rbd_id_put(rbd_dev); - kfree(rbd_dev); -err_out_opt: +err_nomem: kfree(options); -err_mon_dev: kfree(mon_dev_name); -err_out_mod: + kfree(rbd_dev); + dout("Error adding device %s\n", buf); module_put(THIS_MODULE); - return rc; + + return (ssize_t) rc; } static struct rbd_device *__rbd_get_dev(unsigned long id) |