From fc4cf4293f0da3985ca66edc2cf067531d933c42 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Sat, 5 Mar 2022 09:33:08 +0100 Subject: [PATCH] ALSA: x86: Use standard mmap helper for Intel HDMI LPE audio Intel HDMI LPE audio driver has its own mmap callback that mimics with the noncached page attributes, but this is rather superfluous and can be replaced with the standard helper, as the device is only for playback and the write-cache should suffice. This patch drops the own code and just uses the standard helper. Link: https://lore.kernel.org/r/20220305083308.15718-1-tiwai@suse.de Signed-off-by: Takashi Iwai --- sound/x86/intel_hdmi_audio.c | 13 ------------- 1 file changed, 13 deletions(-) diff --git a/sound/x86/intel_hdmi_audio.c b/sound/x86/intel_hdmi_audio.c index 4a3ff64..b006346 100644 --- a/sound/x86/intel_hdmi_audio.c +++ b/sound/x86/intel_hdmi_audio.c @@ -1254,18 +1254,6 @@ static snd_pcm_uframes_t had_pcm_pointer(struct snd_pcm_substream *substream) } /* - * ALSA PCM mmap callback - */ -static int had_pcm_mmap(struct snd_pcm_substream *substream, - struct vm_area_struct *vma) -{ - vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); - return remap_pfn_range(vma, vma->vm_start, - substream->runtime->dma_addr >> PAGE_SHIFT, - vma->vm_end - vma->vm_start, vma->vm_page_prot); -} - -/* * ALSA PCM ops */ static const struct snd_pcm_ops had_pcm_ops = { @@ -1276,7 +1264,6 @@ static const struct snd_pcm_ops had_pcm_ops = { .trigger = had_pcm_trigger, .sync_stop = had_pcm_sync_stop, .pointer = had_pcm_pointer, - .mmap = had_pcm_mmap, }; /* process mode change of the running stream; called in mutex */ -- 2.7.4