diff options
| author | Kai Vehmanen <kai.vehmanen@linux.intel.com> | 2021-02-10 13:52:37 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2021-02-10 20:22:57 +0300 |
| commit | 271d9373db1c76f239fe3124e552b6b58b2af984 (patch) | |
| tree | 451261a1f8cc5e4161cd9417bbf2ae4a35e65e69 /sound | |
| parent | b6eabd247db8bb2d013fb9a9451ecb04a44ee58f (diff) | |
| download | linux-271d9373db1c76f239fe3124e552b6b58b2af984.tar.xz | |
ASoC: SOF: fix runtime pm usage mismatch after probe errors
With current delayed probe implementation, sof_probe_complete is not
called in case of errors. And as this function is responsible for
decrementing runtime pm usage counter, this will result in following
problem:
- probe driver in conditions where probe will fail (to force
the condition on Intel SOF systems, set
"snd_sof_intel_hda_common.codec_mask=0")
- unload driver (runtime-pm usage_count is leaked)
- fix the issue by installing missing fw, modifying module parameters,
etc actions
- try to load driver again -> success, probe ok
-> device never enters runtime suspend
Fix the issue by storing result of delayed probe to a state variable and
providing new snd_sof_device_probe_completed() to be queried from SOF
PCI/ACPI/OF drivers.
If probe never completed successfully, runtime PM was not set up and
thus at remove(), we should not increment usage count anymore.
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@intel.com>
Link: https://lore.kernel.org/r/20210210105237.2179273-1-kai.vehmanen@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/sof/core.c | 10 | ||||
| -rw-r--r-- | sound/soc/sof/sof-pci-dev.c | 3 | ||||
| -rw-r--r-- | sound/soc/sof/sof-priv.h | 2 |
3 files changed, 14 insertions, 1 deletions
diff --git a/sound/soc/sof/core.c b/sound/soc/sof/core.c index 8d13eb13fe08..6d8f7d9fd192 100644 --- a/sound/soc/sof/core.c +++ b/sound/soc/sof/core.c @@ -246,6 +246,8 @@ static int sof_probe_continue(struct snd_sof_dev *sdev) if (plat_data->sof_probe_complete) plat_data->sof_probe_complete(sdev->dev); + sdev->probe_completed = true; + return 0; fw_trace_err: @@ -340,6 +342,14 @@ int snd_sof_device_probe(struct device *dev, struct snd_sof_pdata *plat_data) } EXPORT_SYMBOL(snd_sof_device_probe); +bool snd_sof_device_probe_completed(struct device *dev) +{ + struct snd_sof_dev *sdev = dev_get_drvdata(dev); + + return sdev->probe_completed; +} +EXPORT_SYMBOL(snd_sof_device_probe_completed); + int snd_sof_device_remove(struct device *dev) { struct snd_sof_dev *sdev = dev_get_drvdata(dev); diff --git a/sound/soc/sof/sof-pci-dev.c b/sound/soc/sof/sof-pci-dev.c index 388772f9c4d2..84990cc8aa7d 100644 --- a/sound/soc/sof/sof-pci-dev.c +++ b/sound/soc/sof/sof-pci-dev.c @@ -447,7 +447,8 @@ static void sof_pci_remove(struct pci_dev *pci) snd_sof_device_remove(&pci->dev); /* follow recommendation in pci-driver.c to increment usage counter */ - if (!(sof_pci_debug & SOF_PCI_DISABLE_PM_RUNTIME)) + if (snd_sof_device_probe_completed(&pci->dev) && + !(sof_pci_debug & SOF_PCI_DISABLE_PM_RUNTIME)) pm_runtime_get_noresume(&pci->dev); /* release pci regions and disable device */ diff --git a/sound/soc/sof/sof-priv.h b/sound/soc/sof/sof-priv.h index 682c4b6d01ef..ad0d7ba2708c 100644 --- a/sound/soc/sof/sof-priv.h +++ b/sound/soc/sof/sof-priv.h @@ -389,6 +389,7 @@ struct snd_sof_dev { /* work queue in case the probe is implemented in two steps */ struct work_struct probe_work; + bool probe_completed; /* DSP HW differentiation */ struct snd_sof_pdata *pdata; @@ -464,6 +465,7 @@ struct snd_sof_dev { int snd_sof_device_probe(struct device *dev, struct snd_sof_pdata *plat_data); int snd_sof_device_remove(struct device *dev); int snd_sof_device_shutdown(struct device *dev); +bool snd_sof_device_probe_completed(struct device *dev); int snd_sof_runtime_suspend(struct device *dev); int snd_sof_runtime_resume(struct device *dev); |