Messages in this thread | | | Date | Thu, 19 May 2011 10:46:25 -0700 | From | Nishanth Aravamudan <> | Subject | Re: [PATCH 5/8] powerpc: override dma_get_required_mask by platform hook and ops |
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On 19.05.2011 [17:43:56 +1000], Benjamin Herrenschmidt wrote: > On Wed, 2011-05-11 at 15:25 -0700, Nishanth Aravamudan wrote: > > From: Milton Miller <miltonm@bga.com> > > > > The hook dma_get_required_mask is supposed to return the mask required > > by the platform to operate efficently. The generic version of > > dma_get_required_mask in driver/base/platform.c returns a mask based > > only on max_pfn. However, this is likely too big for iommu systems > > and could be too small for platforms that require a dma offset or have > > a secondary window at a high offset. > > The result of those 3 patches doesn't build on top of my current tree, > the generic dma_ops lacks the dma_get_required_mask hook. I'll have a > look again after the merge window.
Hrm, I think it's because for whatever reason [1] I forgot to cc you on 6/8?
https://lkml.org/lkml/2011/5/11/473
-Nish
[1] AKA over-reliance on get_maintainer.pl and lack of mental oversight!
-- Nishanth Aravamudan <nacc@us.ibm.com> IBM Linux Technology Center
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