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ASoC: qcom: lpass-platform: Update VMA access permissions in mmap callback
author
Srinivasa Rao Mandadapu
<quic_srivasam@quicinc.com>
Fri, 27 May 2022 14:10:08 +0000
(19:40 +0530)
committer
Mark Brown
<broonie@kernel.org>
Wed, 1 Jun 2022 10:24:10 +0000
(12:24 +0200)
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>
sound/soc/qcom/lpass-platform.c
patch
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diff --git
a/sound/soc/qcom/lpass-platform.c
b/sound/soc/qcom/lpass-platform.c
index
f03a7ae
..
b41ab7a
100644
(file)
--- a/
sound/soc/qcom/lpass-platform.c
+++ b/
sound/soc/qcom/lpass-platform.c
@@
-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,