[RFC/RFT] b43: Relax requirement for descriptors to be in the DMA zone

Rafał Miłecki
2011-08-25T18:08:35Z

W dniu 25 sierpnia 2011 19:29 u?ytkownik Larry Finger
<Larry.Finger@lwfinger.net> napisa?:
> On 08/25/2011 12:24 PM, Rafa? Mi?ecki wrote:
>>
>> 2011/8/25 Larry Finger<Larry.Finger@lwfinger.net>:
>>>
>>> When 64-bit DMA was first used, there were problems with the
>>> BCM4311 (14e4:4311). The problem was "fixed" by using the GFP_DMA
>>> flag in the allocation of coherent ring descriptor memory.
>>>
>>> The original problem is now believed to have been due to bugs in
>>> the 64-bit DMA implementation in the rest of the kernel, and that
>>> those bugs have been fixed. Accordingly, the requirement for the
>>> descriptors to be in the DMA zone is relaxed.
>>
>> Larry, it is not clear to me from the commit message: did you test
>> that patch with your 14e4:4311?
>
> Yes.

Great, thanks for taking a look at this :)

--
Rafa?