usb: hso: remove bogus check for EINPROGRESS

This check an inherent race. It opens a race where
an error code has already been set or cleared yet
the URB has not been given back. We cannot do
such an optimization and must unlink unconditionally.

Signed-off-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Author: oneukum

drivers/net/usb/hso.c

@@ -831,8 +831,7 @@ static void hso_net_tx_timeout(struct net_device *net, unsigned int txqueue)
 	dev_warn(&net->dev, "Tx timed out.\n");
 
 	/* Tear the waiting frame off the list */
-	if (odev->mux_bulk_tx_urb &&
-	    (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
+	if (odev->mux_bulk_tx_urb)
 		usb_unlink_urb(odev->mux_bulk_tx_urb);
 
 	/* Update statistics */