[PATCH 0/3] ASoC: SOF: Various runtime pm fixes, improvements
Three patch to correct error path PM runtime handling in few places.
Regards, Peter --- Pierre-Louis Bossart (3): ASoC: SOF: debug: conditionally bump runtime_pm counter on exceptions ASoC: SOF: pcm: fix pm_runtime imbalance in error handling ASoC: SOF: sof-client-probes: fix pm_runtime imbalance in error handling
sound/soc/sof/debug.c | 4 ++-- sound/soc/sof/pcm.c | 11 ++++++----- sound/soc/sof/sof-client-probes.c | 14 ++++++++------ 3 files changed, 16 insertions(+), 13 deletions(-)
From: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com
When a firmware IPC error happens during a pm_runtime suspend, we ignore the error and suspend anyways. However, the code unconditionally increases the runtime_pm counter. This results in a confusing configuration where the code will suspend, resume but never suspend again due to the use of pm_runtime_get_noresume().
The intent of the counter increase was to prevent entry in D3, but if that transition to D3 is already started it cannot be stopped. In addition, there's no point in that case in trying to prevent anything, the firmware error is handled and the next resume will re-initialize the firmware completely.
This patch changes the logic to prevent suspend when the device is pm_runtime active and has a use_count > 0.
Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Reviewed-by: Daniel Baluta daniel.baluta@nxp.com Reviewed-by: Ranjani Sridharan ranjani.sridharan@linux.intel.com Signed-off-by: Peter Ujfalusi peter.ujfalusi@linux.intel.com --- sound/soc/sof/debug.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/sound/soc/sof/debug.c b/sound/soc/sof/debug.c index b42b5982cbbc..d547318e0d32 100644 --- a/sound/soc/sof/debug.c +++ b/sound/soc/sof/debug.c @@ -438,8 +438,8 @@ void snd_sof_handle_fw_exception(struct snd_sof_dev *sdev, const char *msg) /* should we prevent DSP entering D3 ? */ if (!sdev->ipc_dump_printed) dev_info(sdev->dev, - "preventing DSP entering D3 state to preserve context\n"); - pm_runtime_get_noresume(sdev->dev); + "Attempting to prevent DSP from entering D3 state to preserve context\n"); + pm_runtime_get_if_in_use(sdev->dev); }
/* dump vital information to the logs */
From: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com
When an error occurs, we need to make sure the device can pm_runtime suspend instead of keeping it active.
Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Reviewed-by: Daniel Baluta daniel.baluta@nxp.com Reviewed-by: Ranjani Sridharan ranjani.sridharan@linux.intel.com Signed-off-by: Peter Ujfalusi peter.ujfalusi@linux.intel.com --- sound/soc/sof/pcm.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/sound/soc/sof/pcm.c b/sound/soc/sof/pcm.c index 567db32173a8..d0ab6f390734 100644 --- a/sound/soc/sof/pcm.c +++ b/sound/soc/sof/pcm.c @@ -643,16 +643,17 @@ static int sof_pcm_probe(struct snd_soc_component *component) "%s/%s", plat_data->tplg_filename_prefix, plat_data->tplg_filename); - if (!tplg_filename) - return -ENOMEM; + if (!tplg_filename) { + ret = -ENOMEM; + goto pm_error; + }
ret = snd_sof_load_topology(component, tplg_filename); - if (ret < 0) { + if (ret < 0) dev_err(component->dev, "error: failed to load DSP topology %d\n", ret); - return ret; - }
+pm_error: pm_runtime_mark_last_busy(component->dev); pm_runtime_put_autosuspend(component->dev);
From: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com
When an error occurs, we need to make sure the device can pm_runtime suspend instead of keeping it active.
Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Reviewed-by: Daniel Baluta daniel.baluta@nxp.com Reviewed-by: Ranjani Sridharan ranjani.sridharan@linux.intel.com Signed-off-by: Peter Ujfalusi peter.ujfalusi@linux.intel.com --- sound/soc/sof/sof-client-probes.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/sound/soc/sof/sof-client-probes.c b/sound/soc/sof/sof-client-probes.c index fff126808bc0..8d9e9d5f40e4 100644 --- a/sound/soc/sof/sof-client-probes.c +++ b/sound/soc/sof/sof-client-probes.c @@ -218,12 +218,7 @@ static ssize_t sof_probes_dfs_points_read(struct file *file, char __user *to,
ret = ipc->points_info(cdev, &desc, &num_desc); if (ret < 0) - goto exit; - - pm_runtime_mark_last_busy(dev); - err = pm_runtime_put_autosuspend(dev); - if (err < 0) - dev_err_ratelimited(dev, "debugfs read failed to idle %d\n", err); + goto pm_error;
for (i = 0; i < num_desc; i++) { offset = strlen(buf); @@ -241,6 +236,13 @@ static ssize_t sof_probes_dfs_points_read(struct file *file, char __user *to, ret = simple_read_from_buffer(to, count, ppos, buf, strlen(buf));
kfree(desc); + +pm_error: + pm_runtime_mark_last_busy(dev); + err = pm_runtime_put_autosuspend(dev); + if (err < 0) + dev_err_ratelimited(dev, "debugfs read failed to idle %d\n", err); + exit: kfree(buf); return ret;
On Fri, 12 May 2023 13:33:12 +0300, Peter Ujfalusi wrote:
Three patch to correct error path PM runtime handling in few places.
Regards, Peter
Applied to
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next
Thanks!
[1/3] ASoC: SOF: debug: conditionally bump runtime_pm counter on exceptions commit: 3de975862f985f1c9e225a0d13aa3d501373f7c3 [2/3] ASoC: SOF: pcm: fix pm_runtime imbalance in error handling commit: da0fe8fd515a471d373acc3682bfb5522cca4d55 [3/3] ASoC: SOF: sof-client-probes: fix pm_runtime imbalance in error handling commit: bc424273c74c1565c459c8f2a6ed95caee368d0a
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.
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Thanks, Mark
participants (2)
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Mark Brown -
Peter Ujfalusi