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authorHaiyang Zhang <haiyangz@microsoft.com>2019-10-30 15:32:13 +0000
committerDavid S. Miller <davem@davemloft.net>2019-10-30 18:17:36 -0700
commit719b85c336ed35565d0f3982269d6f684087bb00 (patch)
treef08ae7bc835932ecc0392bb56b16af8663ecde00 /drivers/net/hyperv
parentc4509a5ac0ace94d5b1f0092dc4d36933c1d896e (diff)
downloadlinux-719b85c336ed35565d0f3982269d6f684087bb00.tar.bz2
hv_netvsc: Fix error handling in netvsc_attach()
If rndis_filter_open() fails, we need to remove the rndis device created in earlier steps, before returning an error code. Otherwise, the retry of netvsc_attach() from its callers will fail and hang. Fixes: 7b2ee50c0cd5 ("hv_netvsc: common detach logic") Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/hyperv')
-rw-r--r--drivers/net/hyperv/netvsc_drv.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index bab7c1f84dfd..963509add611 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -982,7 +982,7 @@ static int netvsc_attach(struct net_device *ndev,
if (netif_running(ndev)) {
ret = rndis_filter_open(nvdev);
if (ret)
- return ret;
+ goto err;
rdev = nvdev->extension;
if (!rdev->link_state)
@@ -990,6 +990,13 @@ static int netvsc_attach(struct net_device *ndev,
}
return 0;
+
+err:
+ netif_device_detach(ndev);
+
+ rndis_filter_device_remove(hdev, nvdev);
+
+ return ret;
}
static int netvsc_set_channels(struct net_device *net,