linux-kernel - Re: "BUG: unable to handle kernel paging request" on shutdown or killing NetworkManager in latest wireless-testing (with rt73usb wireless adapter)

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Message-Id: <200805302306.48653.IvDoorn@gmail.com>
Date:	Fri, 30 May 2008 23:06:48 +0200
From:	Ivo van Doorn <ivdoorn@...il.com>
To:	"Stefanik Gábor" <netrolller.3d@...il.com>
Cc:	linux-wireless <linux-wireless@...r.kernel.org>,
	linux-kernel@...r.kernel.org
Subject: Re: "BUG: unable to handle kernel paging request" on shutdown or killing NetworkManager in latest wireless-testing (with rt73usb wireless adapter)

Hi,

> I have just compiled a kernel from wireless-testing (32-bit x86), and
> I get this during shutdown or if I kill NetworkManager (blacklisting
> rt73usb fixes it):

Could you try below patch to see if that works?

Ivo

---
diff --git a/drivers/net/wireless/rt2x00/rt2x00usb.c b/drivers/net/wireless/rt2x00/rt2x00usb.c
index 58d1633..63381cf 100644
--- a/drivers/net/wireless/rt2x00/rt2x00usb.c
+++ b/drivers/net/wireless/rt2x00/rt2x00usb.c
@@ -347,8 +347,11 @@ void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev)
 	}
 
 	/*
-	 * Kill guardian urb.
+	 * Kill guardian urb (if required by driver).
 	 */
+	if (!test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags))
+		return;
+
 	for (i = 0; i < rt2x00dev->bcn->limit; i++) {
 		bcn_priv = rt2x00dev->bcn->entries[i].priv_data;
 		if (bcn_priv->guardian_urb)
--
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