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Message-ID: <45EF4305.5060606@lwfinger.net>
Date: Wed, 07 Mar 2007 16:56:05 -0600
From: Larry Finger <larry.finger@lwfinger.net>
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To: Michael Buesch <mb@bu3sch.de>
CC: wireless <linux-wireless@vger.kernel.org>,
	Broadcom Linux <bcm43xx-dev@lists.berlios.de>
Subject: Re: Problem with USB1.1 Host cores with the mb tree for bcm43xx_mac80211
References: <45EF2015.8000802@lwfinger.net> <200703072328.06195.mb@bu3sch.de>
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Michael Buesch wrote:
> On Wednesday 07 March 2007 21:27, Larry Finger wrote:
>> If you have a BCM4311 and are seeing an oops that looks like this when loading bcm43xx_mac80211:
>>
>> ssb: Switching to ChipCommon core, index 0
>> ssb: Switching to PCI-E core, index 3
>> ssb: Switching to USB 1.1 Host core, index 2
>>
>> Unable to handle kernel NULL pointer dereference at 00000000000002d0 RIP:
>>  [<ffffffff8812fcfd>] :usbcore:usb_create_hcd+0x3b/0xe8
>> PGD 3e792067 PUD 3ed66067 PMD 0
>> Oops: 0002 [1] SMP
>> ...
>>
>> there is a temporary, unofficial patch at
>> ftp://lwfinger.dynalias.org/patches/mac80211_usb_problem.patch. Although it works, it attacks the
>> symptom, not the cause, and will never be adopted into the code. Once a proper fix is applied, it
>> will no longer be needed.
> 
> A patch to disable the USB core on non-embedded devices is in my tree now.
> The actual bug is still there, but nobody (except OpenWRT developers ;) )
> should be able to hit it anymore now. :)

Your patch works here. Thanks,

Larry