netdev - [RFC] USB: ipeth: race between ipeth

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Date: Tue, 21 Nov 2023 15:43:11 +0100
From: Oliver Neukum <oneukum@...e.com>
To: forst@....gy,
	diego@...gio.com,
	netdev@...r.kernel.org,
	linux-usb@...r.kernel.org
Cc: Oliver Neukum <oneukum@...e.com>
Subject: [RFC] USB: ipeth: race between ipeth_close and error handling

ipheth_sndbulk_callback() can submit carrier_work
as a part of its error handling. That means that
the driver must make sure that the work is cancelled
after it has made sure that no more URB can terminate
with an error condition.

Hence the order of actions in ipeth_close() needs
to be inverted.

Signed-off-by: Oliver Neukum <oneukum@...e.com>
---
 drivers/net/usb/ipheth.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/usb/ipheth.c b/drivers/net/usb/ipheth.c
index 687d70cfc556..6eeef10edada 100644
--- a/drivers/net/usb/ipheth.c
+++ b/drivers/net/usb/ipheth.c
@@ -475,8 +475,8 @@ static int ipheth_close(struct net_device *net)
 {
 	struct ipheth_device *dev = netdev_priv(net);
 
-	cancel_delayed_work_sync(&dev->carrier_work);
 	netif_stop_queue(net);
+	cancel_delayed_work_sync(&dev->carrier_work);
 	return 0;
 }
 
-- 
2.42.1