linux-kernel - [PATCH 5/6] ASoC: amd: ps: fix byte count return value for invalid SoundWire manager instance

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Date:   Mon, 26 Jun 2023 16:23:53 +0530
From:   Vijendar Mukunda <Vijendar.Mukunda@....com>
To:     <broonie@...nel.org>
CC:     <alsa-devel@...a-project.org>, <Basavaraj.Hiregoudar@....com>,
        <Sunil-kumar.Dommati@....com>, <Mastan.Katragadda@....com>,
        <Arungopal.kondaveeti@....com>,
        Vijendar Mukunda <Vijendar.Mukunda@....com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: [PATCH 5/6] ASoC: amd: ps: fix byte count return value for invalid SoundWire manager instance

acp_get_byte_count() function should return zero bytes instead of
-EINVAL for invalid SoundWire manager instance.

Fixes: f722917350ee ("ASoC: amd: ps: add SoundWire dma driver dma ops")
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@....com>
---
 sound/soc/amd/ps/ps-sdw-dma.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/soc/amd/ps/ps-sdw-dma.c b/sound/soc/amd/ps/ps-sdw-dma.c
index 000ab5d96815..324c80fca672 100644
--- a/sound/soc/amd/ps/ps-sdw-dma.c
+++ b/sound/soc/amd/ps/ps-sdw-dma.c
@@ -318,12 +318,13 @@ static u64 acp63_sdw_get_byte_count(struct acp_sdw_dma_stream *stream, void __io
 		pos_high_reg = sdw1_dma_ring_buf_reg[stream->stream_id].pos_high_reg;
 		break;
 	default:
-		return -EINVAL;
+		goto POINTER_RETURN_BYTES;
 	}
 	if (pos_low_reg) {
 		byte_count.bcount.high = readl(acp_base + pos_high_reg);
 		byte_count.bcount.low = readl(acp_base + pos_low_reg);
 	}
+POINTER_RETURN_BYTES:
 	return byte_count.bytescount;
 }
 
-- 
2.34.1