linux-kernel - [PATCH 1/3] ASoC: apple: mca: Fix final status read on SERDES reset

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Date:   Fri, 24 Feb 2023 16:33:00 +0100
From:   Martin Povišer <povik+lin@...ebit.org>
To:     Martin Povišer <povik+lin@...ebit.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
Cc:     asahi@...ts.linux.dev, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] ASoC: apple: mca: Fix final status read on SERDES reset

>From within the early trigger we are doing a reset of the SERDES unit,
but the final status read is on a bad address. Add the missing SERDES
unit offset in calculation of the address.

Fixes: 3df5d0d97289 ("ASoC: apple: mca: Start new platform driver")
Signed-off-by: Martin Povišer <povik+lin@...ebit.org>
---
 sound/soc/apple/mca.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/apple/mca.c b/sound/soc/apple/mca.c
index 24381c42eb54..9cceeb259952 100644
--- a/sound/soc/apple/mca.c
+++ b/sound/soc/apple/mca.c
@@ -210,7 +210,7 @@ static void mca_fe_early_trigger(struct snd_pcm_substream *substream, int cmd,
 			   SERDES_CONF_SOME_RST);
 		readl_relaxed(cl->base + serdes_conf);
 		mca_modify(cl, serdes_conf, SERDES_STATUS_RST, 0);
-		WARN_ON(readl_relaxed(cl->base + REG_SERDES_STATUS) &
+		WARN_ON(readl_relaxed(cl->base + serdes_unit + REG_SERDES_STATUS) &
 			SERDES_STATUS_RST);
 		break;
 	default:
-- 
2.33.0