diff options
| author | Laszlo Ersek <lersek@redhat.com> | 2011-10-07 21:34:38 +0200 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2011-10-13 15:48:35 +0200 |
| commit | 469738e675524b6aa029ecd46bdda3f878b12eff (patch) | |
| tree | 3eb7ba048443b12adebebff8b76d9b60633c4f49 /drivers/block/xen-blkfront.c | |
| parent | xen-blkfront: If no barrier or flush is supported, use invalid operation. (diff) | |
| download | linux-469738e675524b6aa029ecd46bdda3f878b12eff.tar.xz linux-469738e675524b6aa029ecd46bdda3f878b12eff.zip | |
xen-blkfront: plug device number leak in xlblk_init() error path
... though after a failed xenbus_register_frontend() all may be lost.
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/block/xen-blkfront.c')
| -rw-r--r-- | drivers/block/xen-blkfront.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c index 8bf0cb7b2565..773da7d6491e 100644 --- a/drivers/block/xen-blkfront.c +++ b/drivers/block/xen-blkfront.c @@ -1450,6 +1450,8 @@ static struct xenbus_driver blkfront = { static int __init xlblk_init(void) { + int ret; + if (!xen_domain()) return -ENODEV; @@ -1459,7 +1461,13 @@ static int __init xlblk_init(void) return -ENODEV; } - return xenbus_register_frontend(&blkfront); + ret = xenbus_register_frontend(&blkfront); + if (ret) { + unregister_blkdev(XENVBD_MAJOR, DEV_NAME); + return ret; + } + + return 0; } module_init(xlblk_init); |