[PATCH] ASoC: fsl_xcvr: disable all interrupts when suspend happens

From: Shengjiu Wang <shengjiu.wang@nxp.com>
To: timur@kernel.org, nicoleotsuka@gmail.com, Xiubo.Lee@gmail.com,
	festevam@gmail.com, broonie@kernel.org, perex@perex.cz,
	tiwai@suse.com, alsa-devel@alsa-project.org
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: [PATCH] ASoC: fsl_xcvr: disable all interrupts when suspend happens
Date: Fri, 18 Jun 2021 17:51:16 +0800	[thread overview]
Message-ID: <1624009876-3076-1-git-send-email-shengjiu.wang@nxp.com> (raw)

There is an unhandled interrupt after suspend, which cause endless
interrupt when system resume, so system may hang.

Disable all interrupts in runtime suspend callback to avoid above
issue.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
---
 sound/soc/fsl/fsl_xcvr.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sound/soc/fsl/fsl_xcvr.c b/sound/soc/fsl/fsl_xcvr.c
index df7c189d97dd..37b4fdb236ee 100644
--- a/sound/soc/fsl/fsl_xcvr.c
+++ b/sound/soc/fsl/fsl_xcvr.c
@@ -1233,6 +1233,11 @@ static __maybe_unused int fsl_xcvr_runtime_suspend(struct device *dev)
 	struct fsl_xcvr *xcvr = dev_get_drvdata(dev);
 	int ret;
 
+	ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_IER0,
+				 FSL_XCVR_IRQ_EARC_ALL, 0);
+	if (ret < 0)
+		dev_err(dev, "Failed to clear IER0: %d\n", ret);
+
 	/* Assert M0+ reset */
 	ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_CTRL,
 				 FSL_XCVR_EXT_CTRL_CORE_RESET,
-- 
2.27.0

