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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>
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1 changed files with 9 additions and 1 deletions
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@ -1450,6 +1450,8 @@ static struct xenbus_driver blkfront = {
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static int __init xlblk_init(void)
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{
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int ret;
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if (!xen_domain())
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return -ENODEV;
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@ -1459,7 +1461,13 @@ static int __init xlblk_init(void)
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return -ENODEV;
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}
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return xenbus_register_frontend(&blkfront);
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ret = xenbus_register_frontend(&blkfront);
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if (ret) {
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unregister_blkdev(XENVBD_MAJOR, DEV_NAME);
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return ret;
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}
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return 0;
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}
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module_init(xlblk_init);
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