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ASoC: qcom: lpass-platform: Update VMA access permissions in mmap callback 

[ Upstream commit ef8d89b83b ]

Replace page protection permissions from noncashed to writecombine,
in lpass codec DMA path mmp callabck, to support 64 bit chromeOS.
Avoid SIGBUS error in userspace caused by noncached permissions in
64 bit chromeOS.

Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@quicinc.com>
Link: https://lore.kernel.org/r/1653660608-27245-1-git-send-email-quic_srivasam@quicinc.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Srinivasa Rao Mandadapu 2022-05-27 19:40:08 +05:30 committed by Greg Kroah-Hartman
parent 36274faa8d
commit 0ba8de3e33
1 changed files with 1 additions and 1 deletions
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2
sound/soc/qcom/lpass-platform.c
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@ -898,7 +898,7 @@ static int lpass_platform_cdc_dma_mmap(struct snd_pcm_substream *substream,
struct snd_pcm_runtime *runtime = substream->runtime;
unsigned long size, offset;
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
size = vma->vm_end - vma->vm_start;
offset = vma->vm_pgoff << PAGE_SHIFT;
return io_remap_pfn_range(vma, vma->vm_start,