linux-kernel - Re: 2.6.21-rc4-mm1

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Message-ID: <4601761F.4000302@lwfinger.net>
Date:	Wed, 21 Mar 2007 13:14:55 -0500
From:	Larry Finger <larry.finger@...inger.net>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Zan Lynx <zlynx@....org>, linux-kernel@...r.kernel.org,
	linux-wireless@...r.kernel.org, Michael Buesch <mb@...sch.de>,
	bcm43xx devel <Bcm43xx-dev@...ts.berlios.de>
Subject: Re: 2.6.21-rc4-mm1

Andrew Morton wrote:
> On Tue, 20 Mar 2007 17:23:54 -0600 Zan Lynx <zlynx@....org> wrote:
> 
>> On Mon, 2007-03-19 at 20:56 -0800, Andrew Morton wrote:
>>> Temporarily at
>>>
>>>   http://userweb.kernel.org/~akpm/2.6.21-rc4-mm1/
>>>
>>> Will appear later at
>>>
>>>   ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.21-rc4/2.6.21-rc4-mm1/
>> First impressions:
>> Several of the same bugs as rc3-mm*:
>>       * Freezes immediately if I touch the wlan0 device after loading
>>         the new Broadcom wireless driver.

The version of the ssb driver in 2.6.21-rc4-mm1 has a bug that causes a kernel oops if the bcm43xx
chip contains a USB (dangling) core. This bug has been fixed in Michael Buesch's tree, but
apparently not yet in Linville's wireless-dev tree. The patch is as follows:

commit 08531ff130bcc8181d9294a66e25010f48eefb97
Author: Michael Buesch <mb@...sch.de>
Date:   Wed Mar 7 23:01:08 2007 +0100

    ssb: Don't freeze unregistered devices.

    Signed-off-by: Michael Buesch <mb@...sch.de>

diff --git a/drivers/ssb/core.c b/drivers/ssb/core.c
index 2facada..c956edf 100644
--- a/drivers/ssb/core.c
+++ b/drivers/ssb/core.c
@@ -163,6 +163,8 @@ int ssb_devices_freeze(struct ssb_bus *bus)
 		dev = &(bus->devices[i]);
 		if (!dev->dev->driver)
 			continue;
+		if (!device_is_registered(dev->dev))
+			continue;
 		drv = drv_to_ssb_drv(dev->dev->driver);
 		if (drv && drv->suspend) {
 			err = drv->suspend(dev, state);
@@ -185,6 +187,8 @@ int ssb_devices_thaw(struct ssb_bus *bus)
 		dev = &(bus->devices[i]);
 		if (!dev->dev->driver)
 			continue;
+		if (!device_is_registered(dev->dev))
+			continue;
 		drv = drv_to_ssb_drv(dev->dev->driver);
 		if (drv && drv->resume) {
 			err = drv->resume(dev);

Larry


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