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 <[email protected]>
---
changes in v2:
- Add Fixes tag
- Add comments for the change
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 df7c189d97dd..92dd99258edf 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,
--
2.27.0
On Fri, Jun 18, 2021 at 9:57 AM Shengjiu Wang <[email protected]> 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.
>
> Fixes: 28564486866f ("ASoC: fsl_xcvr: Add XCVR ASoC CPU DAI driver")
> Signed-off-by: Shengjiu Wang <[email protected]>
> ---
> changes in v2:
> - Add Fixes tag
> - Add comments for the change
Reviewed-by: Fabio Estevam <[email protected]>
On Fri, 18 Jun 2021 20:38:33 +0800, Shengjiu Wang 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.
Applied to
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next
Thanks!
[1/1] ASoC: fsl_xcvr: disable all interrupts when suspend happens
commit: ea837090b388245744988083313f6e9c7c9b9699
All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying
to this mail.
Thanks,
Mark