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From:   Zhen Ni <nizhen@uniontech.com>
To:     perex@perex.cz, tiwai@suse.com
Cc:     alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org,
        Zhen Ni <nizhen@uniontech.com>
Subject: [PATCH] ALSA: intel_hdmi: Fix reference to PCM buffer address
Date:   Wed,  2 Mar 2022 15:42:41 +0800
Message-Id: <20220302074241.30469-1-nizhen@uniontech.com>
MIME-Version: 1.0
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Feedback-ID: bizesmtp:uniontech.com:qybgforeign:qybgforeign2
Precedence: bulk

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>
---
 sound/x86/intel_hdmi_audio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/x86/intel_hdmi_audio.c b/sound/x86/intel_hdmi_audio.c
index 1c94eaff1931..4a3ff6468aa7 100644
--- 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_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);
 }
 
-- 
2.20.1