linux-kernel - [PATCH 6/6] ASoC: stm32: i2s: improve error management on probe deferral

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Date:   Mon, 3 Feb 2020 11:08:14 +0100
From:   Olivier Moysan <olivier.moysan@...com>
To:     <lgirdwood@...il.com>, <broonie@...nel.org>, <perex@...ex.cz>,
        <tiwai@...e.com>, <mcoquelin.stm32@...il.com>,
        <alexandre.torgue@...com>, <alsa-devel@...a-project.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-kernel@...r.kernel.org>, <olivier.moysan@...com>
CC:     Etienne Carriere <etienne.carriere@...com>
Subject: [PATCH 6/6] ASoC: stm32: i2s: improve error management on probe deferral

Do not print an error trace when deferring probe for I2S driver.

Signed-off-by: Etienne Carriere <etienne.carriere@...com>
Signed-off-by: Olivier Moysan <olivier.moysan@...com>
---
 sound/soc/stm/stm32_i2s.c | 25 +++++++++++++++++++------
 1 file changed, 19 insertions(+), 6 deletions(-)

diff --git a/sound/soc/stm/stm32_i2s.c b/sound/soc/stm/stm32_i2s.c
index cdcc00d9a67e..2478405727c3 100644
--- a/sound/soc/stm/stm32_i2s.c
+++ b/sound/soc/stm/stm32_i2s.c
@@ -831,25 +831,33 @@ static int stm32_i2s_parse_dt(struct platform_device *pdev,
 	/* Get clocks */
 	i2s->pclk = devm_clk_get(&pdev->dev, "pclk");
 	if (IS_ERR(i2s->pclk)) {
-		dev_err(&pdev->dev, "Could not get pclk\n");
+		if (PTR_ERR(i2s->pclk) != -EPROBE_DEFER)
+			dev_err(&pdev->dev, "Could not get pclk: %ld\n",
+				PTR_ERR(i2s->pclk));
 		return PTR_ERR(i2s->pclk);
 	}
 
 	i2s->i2sclk = devm_clk_get(&pdev->dev, "i2sclk");
 	if (IS_ERR(i2s->i2sclk)) {
-		dev_err(&pdev->dev, "Could not get i2sclk\n");
+		if (PTR_ERR(i2s->i2sclk) != -EPROBE_DEFER)
+			dev_err(&pdev->dev, "Could not get i2sclk: %ld\n",
+				PTR_ERR(i2s->i2sclk));
 		return PTR_ERR(i2s->i2sclk);
 	}
 
 	i2s->x8kclk = devm_clk_get(&pdev->dev, "x8k");
 	if (IS_ERR(i2s->x8kclk)) {
-		dev_err(&pdev->dev, "missing x8k parent clock\n");
+		if (PTR_ERR(i2s->x8kclk) != -EPROBE_DEFER)
+			dev_err(&pdev->dev, "Could not get x8k parent clock: %ld\n",
+				PTR_ERR(i2s->x8kclk));
 		return PTR_ERR(i2s->x8kclk);
 	}
 
 	i2s->x11kclk = devm_clk_get(&pdev->dev, "x11k");
 	if (IS_ERR(i2s->x11kclk)) {
-		dev_err(&pdev->dev, "missing x11k parent clock\n");
+		if (PTR_ERR(i2s->x11kclk) != -EPROBE_DEFER)
+			dev_err(&pdev->dev, "Could not get x11k parent clock: %ld\n",
+				PTR_ERR(i2s->x11kclk));
 		return PTR_ERR(i2s->x11kclk);
 	}
 
@@ -907,7 +915,9 @@ static int stm32_i2s_probe(struct platform_device *pdev)
 	i2s->regmap = devm_regmap_init_mmio_clk(&pdev->dev, "pclk",
 						i2s->base, i2s->regmap_conf);
 	if (IS_ERR(i2s->regmap)) {
-		dev_err(&pdev->dev, "regmap init failed\n");
+		if (PTR_ERR(i2s->regmap) != -EPROBE_DEFER)
+			dev_err(&pdev->dev, "Regmap init error %ld\n",
+				PTR_ERR(i2s->regmap));
 		return PTR_ERR(i2s->regmap);
 	}
 
@@ -918,8 +928,11 @@ static int stm32_i2s_probe(struct platform_device *pdev)
 
 	ret = devm_snd_dmaengine_pcm_register(&pdev->dev,
 					      &stm32_i2s_pcm_config, 0);
-	if (ret)
+	if (ret) {
+		if (ret != -EPROBE_DEFER)
+			dev_err(&pdev->dev, "PCM DMA register error %d\n", ret);
 		return ret;
+	}
 
 	/* Set SPI/I2S in i2s mode */
 	ret = regmap_update_bits(i2s->regmap, STM32_I2S_CGFR_REG,
-- 
2.17.1