UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

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

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>
This commit is contained in:
Srinivasa Rao Mandadapu 2022-05-27 19:40:08 +05:30 committed by Mark Brown
parent aeca8a3295
commit ef8d89b83b
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
sound/soc/qcom/lpass-platform.c
View File

@ -898,7 +898,7 @@ static int lpass_platform_cdc_dma_mmap(struct snd_pcm_substream *substream,
struct snd_pcm_runtime *runtime = substream->runtime; struct snd_pcm_runtime *runtime = substream->runtime;
unsigned long size, offset; 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; size = vma->vm_end - vma->vm_start;
offset = vma->vm_pgoff << PAGE_SHIFT; offset = vma->vm_pgoff << PAGE_SHIFT;
return io_remap_pfn_range(vma, vma->vm_start, return io_remap_pfn_range(vma, vma->vm_start,