[PATCH] ALSA: hda: Use non-SG allocation for the communication buffers

[Takashi Iwai <tiwai@suse.de>]

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.

Looking at the commit history, this change was done together with a
workaround of memalloc fixes, and it must come from misunderstanding
of the data used there.

Fixes: 37137ec26c2c ("ALSA: hda: Once again fix regression of page allocations with IOMMU")
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/hda/hda_intel.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index b33602e64d17..ad474ca9b24e 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1809,7 +1809,7 @@ static int azx_create(struct snd_card *card, struct pci_dev *pci,
 
 	/* use the non-cached pages in non-snoop mode */
 	if (!azx_snoop(chip))
-		azx_bus(chip)->dma_type = SNDRV_DMA_TYPE_DEV_WC_SG;
+		azx_bus(chip)->dma_type = SNDRV_DMA_TYPE_DEV_WC;
 
 	if (chip->driver_type == AZX_DRIVER_NVIDIA) {
 		dev_dbg(chip->card->dev, "Enable delay in RIRB handling\n");
-- 
2.43.0