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xen-devel
[Xen-devel] [PATCH] xen-blkfront: plug device number leak in xlblk_init(
... though after a failed xenbus_register_frontend() all may be lost.
Signed-off-by: Laszlo Ersek <lersek@xxxxxxxxxx>
---
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 9ea8c25..a5a9b1b 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -1385,6 +1385,8 @@ static struct xenbus_driver blkfront = {
static int __init xlblk_init(void)
{
+ int ret;
+
if (!xen_domain())
return -ENODEV;
@@ -1394,7 +1396,13 @@ 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);
--
1.7.4.4
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