From: Zhen Ni nizhen@uniontech.com
commit 0aa6b294b312d9710804679abd2c0c8ca52cc2bc upstream.
PCM buffers might be allocated dynamically when the buffer preallocation failed or a larger buffer is requested, and it's not guaranteed that substream->dma_buffer points to the actually used buffer. The driver needs to refer to substream->runtime->dma_addr instead for the buffer address.
Signed-off-by: Zhen Ni nizhen@uniontech.com Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20220302074241.30469-1-nizhen@uniontech.com Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- sound/x86/intel_hdmi_audio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/sound/x86/intel_hdmi_audio.c +++ b/sound/x86/intel_hdmi_audio.c @@ -1310,7 +1310,7 @@ static int had_pcm_mmap(struct snd_pcm_s { vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); return remap_pfn_range(vma, vma->vm_start, - substream->dma_buffer.addr >> PAGE_SHIFT, + substream->runtime->dma_addr >> PAGE_SHIFT, vma->vm_end - vma->vm_start, vma->vm_page_prot); }