Commit 80a316ff authored Apr 30, 2019 by YueHaibing Committed by Dominique Martinet May 15, 2019

9p/xen: Add cleanup path in p9_trans_xen_init

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: 868eb122 ("xen/9pfs: introduce Xen 9pfs transport driver")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>

parent d4548543

net/9p/trans_xen.c

+7 −1

Original line number	Diff line number	Diff line
		@@ -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);