[PATCH 0/2] ALSA: memalloc: Fix for Xen PV and non-IOMMU systems

[Takashi Iwai <tiwai@suse.de>]

Hi,

this is a patch series to address the recent regression on Xen PV (and
possibly non-IOMMU) systems about the SG-buffer memory allocation.
We switched to use dma_alloc_noncontiguous() as hoped it handling
everything right, but it turned out that this doesn't work always.
So this is one step back, use the explicit SG-buffer with
dma_alloc_coherent() calls, but in a bit more optimized ways, and also
applying only for those systems.


Takashi

===

Takashi Iwai (2):
  ALSA: memalloc: Explicit SG-allocations for Xen PV and non-IOMMU
    systems
  ALSA: memalloc: Use coherent DMA allocation for fallback again

 sound/core/memalloc.c | 68 +++++++++++++++++++++++++++++++++----------
 1 file changed, 53 insertions(+), 15 deletions(-)

-- 
2.35.3