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

Shengjiu Wang shengjiu.wang at nxp.com
Fri Jun 18 11:51:16 CEST 2021


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 at 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



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