netdev - [PATCH1/1] hso modem detect fix patch against Alan Cox'es tty tree

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Date:	Mon, 08 Dec 2008 15:38:31 +0100
From:	Denis Joseph Barrow <D.Barow@...ion.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
CC:	Linux netdev Mailing list <netdev@...r.kernel.org>,
	Linux USB kernel mailing list <linux-usb@...r.kernel.org>
Subject: [PATCH1/1] hso modem detect fix patch against Alan Cox'es tty tree

Here you go good sir,

Fixed incorrect check for the modem port, this prevents
crashes caused by issueing a tiocmget_submit_urb
on endpoints which don't exist for non modem devices. 
Signed-off-by: Denis Joseph Barrow <D.Barow@...ion.com>
---
Index: linux-2.6.28-rc7.alan/drivers/net/usb/hso.c
===================================================================
--- linux-2.6.28-rc7.alan.orig/drivers/net/usb/hso.c	2008-12-08 15:26:00.000000000 +0100
+++ linux-2.6.28-rc7.alan/drivers/net/usb/hso.c	2008-12-08 15:28:10.000000000 +0100
@@ -2659,7 +2659,7 @@
 	serial->parent = hso_dev;
 	hso_dev->port_data.dev_serial = serial;
 
-	if (port & HSO_PORT_MODEM) {
+	if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
 		num_urbs = 2;
 		serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
 					   GFP_KERNEL);



-- 
best regards,
D.J. Barrow

Linux Kernel Developer
Option NV, Gaston Geenslaan 14, 3001 Leuven, Belgium
 
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d.barow@...ion.com
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View attachment "tty-hso-modem.fix.patch" of type "text/x-diff" (786 bytes)