[RFC/RFT] b43: Relax requirement for descriptors to be in the DMA zone
zajec5 at gmail.com
Thu Aug 25 13:24:08 EDT 2011
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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