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Takashi Iwai 28fbfaf6bd ALSA: hda: Use non-SG allocation for the communication buffers
The azx_bus->dma_type is referred only for allocating the
communication buffers like CORB/RIRB, and the allocation size is
small.  Hence it doesn't have to be S/G buffer allocation, which is an
obvious overkill.  Use the standard SNDRV_DMA_TYPE_DEV_WC instead.

This was changed to SNDRV_DMA_TYPE_DEV_WC_SG in the commit
37137ec26c ("ALSA: hda: Once again fix regression of page
allocations with IOMMU") as a workaround for IOMMU-backed
allocations.  But this is no longer needed since the allocation with
SNDRV_DMA_TYPE_DEV_WC itself was fixed in the commit 9c27301342
("ALSA: memalloc: Use DMA API for x86 WC page allocations, too").

So this patch reverts the previous workaround in this piece of code.

Link: https://patch.msgid.link/20240909134744.25426-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
History 2024-09-09 15:48:27 +02:00
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Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.