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| author | Takashi Iwai <tiwai@suse.de> | 2022-11-12 09:47:18 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2022-11-12 09:48:51 +0100 |
| commit | 9d8e536d36e75e76614fe09ffab9a1df95b8b666 (patch) | |
| tree | dfc3999923e3facea7df340060046d41e01dfe15 /sound/soc/pxa | |
| parent | ALSA: hda: fix potential memleak in 'add_widget_node' (diff) | |
| download | linux-9d8e536d36e75e76614fe09ffab9a1df95b8b666.tar.xz linux-9d8e536d36e75e76614fe09ffab9a1df95b8b666.zip | |
ALSA: memalloc: Try dma_alloc_noncontiguous() at first
The latest fix for the non-contiguous memalloc helper changed the
allocation method for a non-IOMMU system to use only the fallback
allocator. This should have worked, but it caused a problem sometimes
when too many non-contiguous pages are allocated that can't be treated
by HD-audio controller.
As a quirk workaround, go back to the original strategy: use
dma_alloc_noncontiguous() at first, and apply the fallback only when
it fails, but only for non-IOMMU case.
We'll need a better fix in the fallback code as well, but this
workaround should paper over most cases.
Fixes: 9736a325137b ("ALSA: memalloc: Don't fall back for SG-buffer with IOMMU")
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/CAHk-=wgSH5ubdvt76gNwa004ooZAEJL_1Q-Fyw5M2FDdqL==dg@mail.gmail.com
Link: https://lore.kernel.org/r/20221112084718.3305-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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