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Subject[PATCH 5.15 136/262] ALSA: intel_hdmi: Fix reference to PCM buffer address
Date
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
@@ -1261,7 +1261,7 @@ 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);
}


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