From: Johan Hovold <johan@kernel.org>
To: "David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>
Cc: linux-usb@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, Johan Hovold <johan@kernel.org>
Subject: [PATCH net] net: cdc-phonet: fix data-interface release on probe failure
Date: Thu, 18 Mar 2021 16:57:49 +0100 [thread overview]
Message-ID: <20210318155749.22597-1-johan@kernel.org> (raw)
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>
---
drivers/net/usb/cdc-phonet.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/usb/cdc-phonet.c b/drivers/net/usb/cdc-phonet.c
index 02e6bbb17b15..8d1f69dad603 100644
--- a/drivers/net/usb/cdc-phonet.c
+++ b/drivers/net/usb/cdc-phonet.c
@@ -387,6 +387,8 @@ 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;
}
--
2.26.2
next reply other threads:[~2021-03-18 15:59 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-18 15:57 Johan Hovold [this message]
2021-03-19 2:50 ` [PATCH net] net: cdc-phonet: fix data-interface release on probe failure patchwork-bot+netdevbpf
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