diff options
| author | YueHaibing <yuehaibing@huawei.com> | 2019-04-30 22:39:33 +0800 |
|---|---|---|
| committer | Dominique Martinet <dominique.martinet@cea.fr> | 2019-05-15 13:00:07 +0000 |
| commit | 80a316ff16276b36d0392a8f8b2f63259857ae98 (patch) | |
| tree | 27b903a120bca18d3994228e06ab2ee13b405044 /net | |
| parent | d4548543fc4ece56c6f04b8586f435fb4fd84c20 (diff) | |
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: 868eb122739a ("xen/9pfs: introduce Xen 9pfs transport driver")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>
Diffstat (limited to 'net')
| -rw-r--r-- | net/9p/trans_xen.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/net/9p/trans_xen.c b/net/9p/trans_xen.c index e2fbf3677b9b..9daab0dd833b 100644 --- a/net/9p/trans_xen.c +++ b/net/9p/trans_xen.c @@ -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); |