Re: [spi-devel-general] [patch 2.6.15-rc5-mm2] SPI, priority inversiontweak

[Vitaly Wool]

Okay, sorry, I've misundastood that.

Vitaly

David Brownell wrote:

> On Tuesday 13 December 2005 1:49 pm, Vitaly Wool wrote:
>  
>
> > So you're turning this to be unsafe if the buffer is in use, right? Funny...
> >    
>
> I have no idea what you mean by that comment.  The parameters to that
> function have always been documented as "will copy", and the two branches
> (busy/not) differ only in _which_ buffer they use from the heap (the
> fast pre-allocated one, or a freshly allocated scratch buffer).  Heap
> buffers are by definition DMA-safe.
>
> - Dave
>
>
>  
>
> > David Brownell wrote:
> >
> >    
> >
> > > This is an updated version of the patch from Mark Underwood, handling
> > > the no-memory case better and using SLAB_KERNEL not SLAB_ATOMIC.
> > >
> > >      
>
>
>  

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