Re: [PATCH] ASoC: fsl_xcvr: disable all interrupts when suspend happens
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From: Fabio Estevam <festevam@gmail.com>
Date: 2021-06-18 11:20:54
Also in:
alsa-devel, lkml
Hi Shengjiu, On Fri, Jun 18, 2021 at 7:10 AM Shengjiu Wang [off-list ref] wrote:
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.
Fixe tag?
quoted hunk ↗ jump to hunk
+ 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); +
The operations in _suspend() are usually balanced with the ones in _resume(). Shouldn't you enable the interrupts in resume() then? I see that the interrupts are currently enabled inside fsl_xcvr_prepare().