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Message-Id: <20210712061044.393621462@linuxfoundation.org>
Date: Mon, 12 Jul 2021 08:12:07 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Shengjiu Wang <shengjiu.wang@....com>,
Fabio Estevam <festevam@...il.com>,
Mark Brown <broonie@...nel.org>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.12 644/700] ASoC: fsl_xcvr: disable all interrupts when suspend happens
From: Shengjiu Wang <shengjiu.wang@....com>
[ Upstream commit ea837090b388245744988083313f6e9c7c9b9699 ]
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.
Fixes: 28564486866f ("ASoC: fsl_xcvr: Add XCVR ASoC CPU DAI driver")
Signed-off-by: Shengjiu Wang <shengjiu.wang@....com>
Reviewed-by: Fabio Estevam <festevam@...il.com>
Link: https://lore.kernel.org/r/1624019913-3380-1-git-send-email-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
sound/soc/fsl/fsl_xcvr.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/sound/soc/fsl/fsl_xcvr.c b/sound/soc/fsl/fsl_xcvr.c
index 6dd0a5fcd455..070e3f32859f 100644
--- a/sound/soc/fsl/fsl_xcvr.c
+++ b/sound/soc/fsl/fsl_xcvr.c
@@ -1236,6 +1236,16 @@ static __maybe_unused int fsl_xcvr_runtime_suspend(struct device *dev)
struct fsl_xcvr *xcvr = dev_get_drvdata(dev);
int ret;
+ /*
+ * Clear interrupts, when streams starts or resumes after
+ * suspend, interrupts are enabled in prepare(), so no need
+ * to enable interrupts in resume().
+ */
+ 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,
--
2.30.2
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