From: Shengjiu Wang shengjiu.wang@nxp.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@nxp.com Reviewed-by: Fabio Estevam festevam@gmail.com Link: https://lore.kernel.org/r/1624019913-3380-1-git-send-email-shengjiu.wang@nxp... Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.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 6cb558165848..46f3f2c68756 100644 --- a/sound/soc/fsl/fsl_xcvr.c +++ b/sound/soc/fsl/fsl_xcvr.c @@ -1233,6 +1233,16 @@ 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,