OpenE2K
/
linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

ALSA: pcm: Yet another missing check of non-cached buffer type 

commit 2406ff9b86 upstream.

For non-x86 architectures, SNDRV_DMA_TYPE_DEV_UC should be treated
equivalent with SNDRV_DMA_TYPE_DEV, where the default mmap handler
still checks only about SNDRV_DMA_TYPE_DEV.  Make the check more
proper.

Note that all existing users of *_UC buffer types are x86-only, so
this doesn't fix any bug, but just for consistency.

Fixes: 42e748a0b3 ("ALSA: memalloc: Add non-cached buffer type")
Link: https://lore.kernel.org/r/20191108165626.5947-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Takashi Iwai 2019-11-08 17:56:26 +01:00 committed by Greg Kroah-Hartman
parent aea6343885
commit d77ae76247
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
sound/core/pcm_native.c
View File

@ -3408,7 +3408,8 @@ int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
#endif /* CONFIG_GENERIC_ALLOCATOR */
#ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */
if (IS_ENABLED(CONFIG_HAS_DMA) && !substream->ops->page &&
substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
(substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV ||
substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_UC))
return dma_mmap_coherent(substream->dma_buffer.dev.dev,
area,
substream->runtime->dma_area,