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

[Takashi Iwai]

On Tue, 24 Jan 2023 10:27:42 +0100,
Takashi Iwai wrote:
> 
> 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.

It seems that the second patch causes a problem; at least I see casual
Oopses on my system after using the patch.  Let's scratch.

I'll resubmit the fix.  Marek, could you try that later and report
back if it still works and doesn't break things again?


thanks,

Takashi