Messages in this thread | | | From | Michael Buesch <> | Subject | Re: [PATCH 0/3] Add API for weak DMA masks | Date | Thu, 1 May 2008 17:47:26 +0200 |
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On Thursday 01 May 2008 17:43:58 Christoph Hellwig wrote: > On Thu, May 01, 2008 at 05:42:04PM +0200, Michael Buesch wrote: > > Yeah. because it has to be done in every driver. > > So we put the implementation into a central place, instead of > > reimplementing the wheel over and over again. This way we avoid bugs, > > like the "b43 broken on VIA boards" in the first place. > > Currently every driver requesting a >32bit mask and not retrying with > > a lower mask is broken on VIA hardware. I dunno how many of the current > > drivers that are, but everybody can easily see that is not a b43-specific > > problem that we should solve for b43 only. > > Yeah. Personally I'd rather let set_dma_mask fall back silently,
We've discussed that and this behaviour is not acceptable, as the driver must know about a possible fallback in case it can do 32bit DMA more efficiently than 64bit DMA, for example.
So here we go. People rejected that approach, that I also suggested. Here's what people want.
-- Greetings Michael.
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