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| author | Takashi Iwai <tiwai@suse.de> | 2021-08-04 08:13:29 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2021-08-04 08:13:54 +0200 |
| commit | 623c10108338b6b4e2c99de9fbc785f30b526c54 (patch) | |
| tree | 448d45414f6e7d839a27db514e20c7591db08e9a /sound/core/memalloc.c | |
| parent | ba447289fd06c8678eaf51ccffb1b0c9a6a56c9a (diff) | |
| download | linux-623c10108338b6b4e2c99de9fbc785f30b526c54.tar.gz | |
ALSA: memalloc: Fix pgprot for WC mmap on x86
We have a special handling of WC pages on x86, and it's currently
specific to HD-audio. The last forgotten piece was the pgprot setup
for the mmap with WC pages.
This patch moves the pgprot setup for WC pages from HD-audio-specific
mmap callback to the common helper code. It allows us to remove the
superfluous mmap callback in HD-audio and its prepare_mmap
redirection.
Link: https://lore.kernel.org/r/20210804061329.29265-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/memalloc.c')
| -rw-r--r-- | sound/core/memalloc.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sound/core/memalloc.c b/sound/core/memalloc.c index 58bab2cfdb87..084b2600a423 100644 --- a/sound/core/memalloc.c +++ b/sound/core/memalloc.c @@ -407,6 +407,10 @@ static void snd_dma_dev_free(struct snd_dma_buffer *dmab) static int snd_dma_dev_mmap(struct snd_dma_buffer *dmab, struct vm_area_struct *area) { +#ifdef CONFIG_X86 + if (dmab->dev.type == SNDRV_DMA_TYPE_DEV_WC) + area->vm_page_prot = pgprot_writecombine(area->vm_page_prot); +#endif return dma_mmap_coherent(dmab->dev.dev, area, dmab->area, dmab->addr, dmab->bytes); } |