diff mbox series

[4.4,28/33] net: cdc-phonet: fix data-interface release on probe failure

Message ID 20210329075606.163325635@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg KH March 29, 2021, 7:58 a.m. UTC 
From: Johan Hovold <johan@kernel.org>

[ Upstream commit c79a707072fe3fea0e3c92edee6ca85c1e53c29f ]

Set the disconnected flag before releasing the data interface in case
netdev registration fails to avoid having the disconnect callback try to
deregister the never registered netdev (and trigger a WARN_ON()).

Fixes: 87cf65601e17 ("USB host CDC Phonet network interface driver")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/usb/cdc-phonet.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/usb/cdc-phonet.c b/drivers/net/usb/cdc-phonet.c
index ff2270ead2e6..84e0e7f78029 100644
--- a/drivers/net/usb/cdc-phonet.c
+++ b/drivers/net/usb/cdc-phonet.c
@@ -406,6 +406,8 @@  static int usbpn_probe(struct usb_interface *intf, const struct usb_device_id *i
 
 	err = register_netdev(dev);
 	if (err) {
+		/* Set disconnected flag so that disconnect() returns early. */
+		pnd->disconnected = 1;
 		usb_driver_release_interface(&usbpn_driver, data_intf);
 		goto out;
 	}