[ 3.5.y.z extended stable ] Patch "rtlwifi: rtl8192cu: Fix NULL dereference BUG when using" has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    rtlwifi: rtl8192cu: Fix NULL dereference BUG when using

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From da0ec3df4b9ff45e8e653ff534721275c1dfecab Mon Sep 17 00:00:00 2001
From: Larry Finger <Larry.Finger at lwfinger.net>
Date: Wed, 6 Feb 2013 12:54:17 -0600
Subject: [PATCH] rtlwifi: rtl8192cu: Fix NULL dereference BUG when using
 new_id

commit 957f4aca5fa0db69635271bc4621cc0b65b2d590 upstream.

When the new_id entry in /sysfs is used for a foreign USB device, rtlwifi
BUGS with a NULL pointer dereference because the per-driver configuration
data is not available. The probe function has been restructured as
suggested by Ben Hutchings <bhutchings at solarflare.com>.

Signed-off-by: Larry Finger <Larry.Finger at lwfinger.net>
Signed-off-by: John W. Linville <linville at tuxdriver.com>
[ luis: adjust context ]
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 drivers/net/wireless/rtlwifi/rtl8192cu/sw.c | 8 +++++++-
 drivers/net/wireless/rtlwifi/usb.c          | 5 +++--
 drivers/net/wireless/rtlwifi/usb.h          | 3 ++-
 3 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c b/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c
index b7e6607..6f4f9aa 100644
--- a/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c
+++ b/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c
@@ -363,9 +363,15 @@ static struct usb_device_id rtl8192c_usb_ids[] = {

 MODULE_DEVICE_TABLE(usb, rtl8192c_usb_ids);

+static int rtl8192cu_probe(struct usb_interface *intf,
+			   const struct usb_device_id *id)
+{
+	return rtl_usb_probe(intf, id, &rtl92cu_hal_cfg);
+}
+
 static struct usb_driver rtl8192cu_driver = {
 	.name = "rtl8192cu",
-	.probe = rtl_usb_probe,
+	.probe = rtl8192cu_probe,
 	.disconnect = rtl_usb_disconnect,
 	.id_table = rtl8192c_usb_ids,

diff --git a/drivers/net/wireless/rtlwifi/usb.c b/drivers/net/wireless/rtlwifi/usb.c
index 17cd028..c03a018 100644
--- a/drivers/net/wireless/rtlwifi/usb.c
+++ b/drivers/net/wireless/rtlwifi/usb.c
@@ -935,7 +935,8 @@ static struct rtl_intf_ops rtl_usb_ops = {
 };

 int __devinit rtl_usb_probe(struct usb_interface *intf,
-			const struct usb_device_id *id)
+			    const struct usb_device_id *id,
+			    struct rtl_hal_cfg *rtl_hal_cfg)
 {
 	int err;
 	struct ieee80211_hw *hw = NULL;
@@ -970,7 +971,7 @@ int __devinit rtl_usb_probe(struct usb_interface *intf,
 	usb_set_intfdata(intf, hw);
 	/* init cfg & intf_ops */
 	rtlpriv->rtlhal.interface = INTF_USB;
-	rtlpriv->cfg = (struct rtl_hal_cfg *)(id->driver_info);
+	rtlpriv->cfg = rtl_hal_cfg;
 	rtlpriv->intf_ops = &rtl_usb_ops;
 	rtl_dbgp_flag_init(hw);
 	/* Init IO handler */
diff --git a/drivers/net/wireless/rtlwifi/usb.h b/drivers/net/wireless/rtlwifi/usb.h
index 43846b3..b1a9cb2 100644
--- a/drivers/net/wireless/rtlwifi/usb.h
+++ b/drivers/net/wireless/rtlwifi/usb.h
@@ -157,7 +157,8 @@ struct rtl_usb_priv {


 int __devinit rtl_usb_probe(struct usb_interface *intf,
-			    const struct usb_device_id *id);
+			    const struct usb_device_id *id,
+			    struct rtl_hal_cfg *rtl92cu_hal_cfg);
 void rtl_usb_disconnect(struct usb_interface *intf);
 int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message);
 int rtl_usb_resume(struct usb_interface *pusb_intf);
--
1.8.1.2