[RFC/RFT] b43: Relax requirement for descriptors to be in the DMA zone
Larry.Finger at lwfinger.net
Thu Aug 25 13:29:50 EDT 2011
On 08/25/2011 12:24 PM, Rafał Miłecki wrote:
> 2011/8/25 Larry Finger<Larry.Finger at 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?
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