Re: b43 dma error

[John Daiker <daikerjohn@gmail.com>]

On 09/08/2009 11:13 AM, Michael Buesch wrote:
> On Tuesday 08 September 2009 19:50:25 John Daiker wrote:
>> On 09/08/2009 07:54 AM, Larry Finger wrote:
>>> Michael Buesch wrote:
>>>> On Tuesday 08 September 2009 15:47:32 Dave Young wrote:
>>>>> I tested wireless-testing b43 driver, but got "Fatal DMA error"
>>>>> then the controller keep restarting...
>>>>>
>>>>> Please tell what I can provide or test, Thanks.
>>>>
>>>> Is this a regression? If so, please bisect.
>>>
>>> It is something specific to his system as I don't see anything like
>>> this. In addition, there are some users on the openSUSE forums that
>>> have implemented the latest compat-wireless and switched away from
>>> Broadcom wl to b43 on their LP PHY devices. So far, no complaints from
>>> them.
>>>
>>> Please reboot so that we see the ssb output as well. Use the command
>>>
>>> dmesg | egrep "ssb|b43"
>>>
>>> That way we will be able to see exactly what kind of device you have
>>> and what revisions are in it. AFAIK, the testing to date has been
>>> limited to Rev 1 PHYs and Rev 2 radios.
>>>
>>> Larry
>>>
>>
>> I can confirm the same issue.  I have a HP Mini 1116NR with a Broadcom 4312.  Looks to be a PHY 1, Radio 2:
>>
>> --snip--
>> [  456.165296] b43-phy0 debug: Found PHY: Analog 6, Type 5, Revision 1
>> [  456.165364] b43-phy0 debug: Found Radio: Manuf 0x17F, Version 0x2062, Revision 2
>> --snip--
>>
>> I've attached the output of 'dmesg | egrep "ssb|b43"', my kernel config, and lspci -vv and lspci -nn
>>
>> Note: With the dmesg output, I had unloaded the b43 module previous 'modprobe -r b43' and then loaded it again with debug output: 'modprobe b43 verbose=3'
>>
>> John Daiker
>>
>
> To ask the question once again: Is this a regression?
> This is a critical question to track down the bug.
>

I would argue that this is not a regression.  Before the LP PHY work was 
done, the card wouldn't work at all with the b43 driver.  "Didn't work 
then, doesn't work now" is kinda my reasoning, I guess.

Thanks for the work on the LP PHY support, though.  Always great that 
new hardware continues to gain support! :)

JD