Messages in this thread | | | Date | Thu, 29 Jun 2006 23:15:13 +0200 | From | "Gerhard Pircher" <> | Subject | Re: [Alsa-devel] RFC: dma_mmap_coherent() for powerpc/ppc architecture and ALSA? |
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-------- Original-Nachricht -------- Datum: Thu, 29 Jun 2006 11:27:15 +0200 Von: Takashi Iwai <tiwai@suse.de> An: Gerhard Pircher <gerhard_pircher@gmx.net> Betreff: Re: [Alsa-devel] RFC: dma_mmap_coherent() for powerpc/ppc architecture and ALSA?
> 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(). > > > Takashi > That's indeed strange! I'm sure that the new code is called by the sound drivers. Should snd_pcm_mmap_data_nopage() not be used at all anymore, or are there any cases that could still trigger a call of snd_pcm_mmap_data_nopage()?
Gerhard
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