linux-kernel - [PATCH] ASoC: amd: Fix reference to PCM buffer address

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Date:   Wed, 16 Mar 2022 17:13:03 +0800
From:   Meng Tang <tangmeng@...ontech.com>
To:     perex@...ex.cz, tiwai@...e.com, broonie@...nel.org,
        lgirdwood@...il.com, Vijendar.Mukunda@....com
Cc:     alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        Meng Tang <tangmeng@...ontech.com>
Subject: [PATCH] ASoC: amd: Fix reference to PCM buffer address

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.

Fixes: cab396d8b22c1 ("ASoC: amd: add ACP5x pcm dma driver ops")
Signed-off-by: Meng Tang <tangmeng@...ontech.com>
---
 sound/soc/amd/vangogh/acp5x-pcm-dma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/amd/vangogh/acp5x-pcm-dma.c b/sound/soc/amd/vangogh/acp5x-pcm-dma.c
index 31fa166df98a..d36bb718370f 100644
--- a/sound/soc/amd/vangogh/acp5x-pcm-dma.c
+++ b/sound/soc/amd/vangogh/acp5x-pcm-dma.c
@@ -281,7 +281,7 @@ static int acp5x_dma_hw_params(struct snd_soc_component *component,
 		return -EINVAL;
 	}
 	size = params_buffer_bytes(params);
-	rtd->dma_addr = substream->dma_buffer.addr;
+	rtd->dma_addr = substream->runtime->dma_addr;
 	rtd->num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT);
 	config_acp5x_dma(rtd, substream->stream);
 	return 0;
-- 
2.20.1