Messages in this thread | | | Date | Thu, 29 Jun 2006 11:27:15 +0200 | From | Takashi Iwai <> | Subject | Re: [Alsa-devel] RFC: dma_mmap_coherent() for powerpc/ppc architecture and ALSA? |
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At Wed, 28 Jun 2006 22:27:53 +0200, Gerhard Pircher wrote: > > Hi, > > It took a little bit longer to integrate the patch, as I didn't figure out first how to implement the __dma_mmap_coherent() function for PPC systems with CONFIG_NOT_COHERENT_CACHE defined. :) > > Unfortunately my system still crashes within snd_pcm_mmap_data_nopage() > (sound/core/pcm_native.c), as you can see below. I guess it tries to remap > a DMA buffer allocated by the not cache coherent DMA memory allocation > function in arch/ppc/kernel/dma-mapping.c.
Strange, nopage will be never called if you apply my patch and modify to use dma_mmap_coherent().
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