[0/4] Fix potential issues with x86 PCM SG-buffer
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Message ID 20200615160045.2703-1-tiwai@suse.de
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  • Fix potential issues with x86 PCM SG-buffer
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Takashi Iwai June 15, 2020, 4 p.m. UTC
Hi,

it turned out that x86 SG-pages that are used for PCM buffers aren't
safe on x86 in all cases, and we need some limitation and workarounds
for non-standard configurations.  This patch set is an attempt to
paper over it in a minimalistic way.


Takashi

===

Takashi Iwai (4):
  ALSA: pcm: Use dma_mmap_coherent() on x86, too
  ALSA: memalloc: Initialize all fields of snd_dma_buffer properly
  ALSA: memalloc: Make SG-buffer helper usable for continuous buffer,
    too
  ALSA: pcm: Use SG-buffer only when direct DMA is available

 include/sound/memalloc.h |  9 ++++++++-
 sound/core/memalloc.c    |  7 +++----
 sound/core/pcm_memory.c  | 13 +++++++++++++
 sound/core/pcm_native.c  |  2 --
 sound/core/sgbuf.c       |  3 +++
 5 files changed, 27 insertions(+), 7 deletions(-)