linux-kernel - [PATCH] ASoC: fsl_sai: Remove expensive print in irq handler

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Date:   Fri, 18 Jan 2019 14:26:46 +0000
From:   Daniel Baluta <daniel.baluta@....com>
To:     "broonie@...nel.org" <broonie@...nel.org>
CC:     "Xiubo.Lee@...il.com" <Xiubo.Lee@...il.com>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "S.j. Wang" <shengjiu.wang@....com>,
        dl-linux-imx <linux-imx@....com>,
        Fabio Estevam <fabio.estevam@....com>,
        "nicoleotsuka@...il.com" <nicoleotsuka@...il.com>,
        Daniel Baluta <daniel.baluta@....com>
Subject: [PATCH] ASoC: fsl_sai: Remove expensive print in irq handler

From: Shengjiu Wang <shengjiu.wang@....com>

When stopping audio, ASoC will first stop DMA then CPU DAI.
Sometimes there is a delay between DMA stop and CPU DAI stop, which
triggers an underrun error. Now, because of the delay introduced
by dev_err another underrun error will occur causing a vicious circle
making impossible to stop CPU DAI.

Signed-off-by: Shengjiu Wang <shengjiu.wang@....com>
Signed-off-by: Daniel Baluta <daniel.baluta@....com>
---
 sound/soc/fsl/fsl_sai.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c
index 4163f2cfc06f..db9e0872f73d 100644
--- a/sound/soc/fsl/fsl_sai.c
+++ b/sound/soc/fsl/fsl_sai.c
@@ -62,10 +62,10 @@ static irqreturn_t fsl_sai_isr(int irq, void *devid)
 		dev_dbg(dev, "isr: Start of Tx word detected\n");
 
 	if (flags & FSL_SAI_CSR_SEF)
-		dev_warn(dev, "isr: Tx Frame sync error detected\n");
+		dev_dbg(dev, "isr: Tx Frame sync error detected\n");
 
 	if (flags & FSL_SAI_CSR_FEF) {
-		dev_warn(dev, "isr: Transmit underrun detected\n");
+		dev_dbg(dev, "isr: Transmit underrun detected\n");
 		/* FIFO reset for safety */
 		xcsr |= FSL_SAI_CSR_FR;
 	}
@@ -96,10 +96,10 @@ static irqreturn_t fsl_sai_isr(int irq, void *devid)
 		dev_dbg(dev, "isr: Start of Rx word detected\n");
 
 	if (flags & FSL_SAI_CSR_SEF)
-		dev_warn(dev, "isr: Rx Frame sync error detected\n");
+		dev_dbg(dev, "isr: Rx Frame sync error detected\n");
 
 	if (flags & FSL_SAI_CSR_FEF) {
-		dev_warn(dev, "isr: Receive overflow detected\n");
+		dev_dbg(dev, "isr: Receive overflow detected\n");
 		/* FIFO reset for safety */
 		xcsr |= FSL_SAI_CSR_FR;
 	}
-- 
2.17.1