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ALSA: intel_hdmi: Fix reference to PCM buffer address

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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>
This commit is contained in:
Zhen Ni 2022-03-02 15:42:41 +08:00 committed by Greg Kroah-Hartman
parent e57dfaf66f
commit 336872601c
1 changed files with 1 additions and 1 deletions
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2
sound/x86/intel_hdmi_audio.c
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@ -1276,7 +1276,7 @@ static int had_pcm_mmap(struct snd_pcm_substream *substream,
{
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);
}