From 3b7d2b319db0ba1f6208ca58b297fb419301f85a Mon Sep 17 00:00:00 2001
From: Jan Dumon <j.dumon@option.com>
Date: Wed, 1 Apr 2009 22:57:20 +0000
Subject: [PATCH] hso: fix for crash when unplugging the device
Changed the order in which things are freed. This fixes an oops when
unplugging the device while network traffic is ongoing.
Signed-off-by: Jan Dumon <j.dumon@option.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/usb/hso.c | 19 +++++++++++--------
1 file changed, 11 insertions(+), 8 deletions(-)
diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c
index 28d1424a3110..779a0078fcde 100644
--- a/drivers/net/usb/hso.c
+++ b/drivers/net/usb/hso.c
@@ -5,6 +5,7 @@
* Copyright (C) 2008 Option International
* Filip Aben <f.aben@option.com>
* Denis Joseph Barrow <d.barow@option.com>
+ * Jan Dumon <j.dumon@option.com>
* Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
* <ajb@spheresystems.co.uk>
* Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
@@ -2417,20 +2418,22 @@ static void hso_free_net_device(struct hso_device *hso_dev)
if (!hso_net)
return;
+ remove_net_device(hso_net->parent);
+
+ if (hso_net->net) {
+ unregister_netdev(hso_net->net);
+ free_netdev(hso_net->net);
+ }
+
/* start freeing */
for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
kfree(hso_net->mux_bulk_rx_buf_pool[i]);
+ hso_net->mux_bulk_rx_buf_pool[i] = NULL;
}
usb_free_urb(hso_net->mux_bulk_tx_urb);
kfree(hso_net->mux_bulk_tx_buf);
-
- remove_net_device(hso_net->parent);
-
- if (hso_net->net) {
- unregister_netdev(hso_net->net);
- free_netdev(hso_net->net);
- }
+ hso_net->mux_bulk_tx_buf = NULL;
kfree(hso_dev);
}
@@ -2620,12 +2623,12 @@ static void hso_free_tiomget(struct hso_serial *serial)
{
struct hso_tiocmget *tiocmget = serial->tiocmget;
if (tiocmget) {
- kfree(tiocmget);
if (tiocmget->urb) {
usb_free_urb(tiocmget->urb);
tiocmget->urb = NULL;
}
serial->tiocmget = NULL;
+ kfree(tiocmget);
}
}
--
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