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9p/xen: Add cleanup path in p9_trans_xen_init

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If xenbus_register_frontend() fails in p9_trans_xen_init,
we should call v9fs_unregister_trans() to do cleanup.

Link: http://lkml.kernel.org/r/20190430143933.19368-1-yuehaibing@huawei.com
Cc: stable@vger.kernel.org
Fixes: 868eb12273 ("xen/9pfs: introduce Xen 9pfs transport driver")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>
This commit is contained in:
YueHaibing 2019-04-30 22:39:33 +08:00 • committed by Dominique Martinet
commit 80a316ff16
1 changed files with 7 additions and 1 deletions
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8
net/9p/trans_xen.c
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@ -530,13 +530,19 @@ static struct xenbus_driver xen_9pfs_front_driver = {
static int p9_trans_xen_init(void)
{
int rc;
if (!xen_domain())
return -ENODEV;
pr_info("Initialising Xen transport for 9pfs\n");
v9fs_register_trans(&p9_xen_trans);
return xenbus_register_frontend(&xen_9pfs_front_driver);
rc = xenbus_register_frontend(&xen_9pfs_front_driver);
if (rc)
v9fs_unregister_trans(&p9_xen_trans);
return rc;
}
module_init(p9_trans_xen_init);