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>
if (plat_data->sof_probe_complete)
plat_data->sof_probe_complete(sdev->dev);
+ sdev->probe_completed = true;
+
return 0;
fw_trace_err:
}
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);
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 */
/* 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;
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);