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Commit 97968b46 authored by Zhen Ni's avatar Zhen Ni Committed by Greg Kroah-Hartman
Browse files

ALSA: intel_hdmi: Fix reference to PCM buffer address 



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: default avatarZhen Ni <nizhen@uniontech.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20220302074241.30469-1-nizhen@uniontech.com


Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent afe6ce8a

sound/x86/intel_hdmi_audio.c

+1 −1
Original line number Diff line number Diff line
@@ -1310,7 +1310,7 @@ 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);

}