From: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com
[ Upstream commit 410e5e55c9c1c9c0d452ac5b9adb37b933a7747e ]
The initial intent of releasing resources in the .remove does not work well with HDaudio codecs. If the probe_continue() fails in a work queue, e.g. due to missing firmware or authentication issues, we don't release any resources, and as a result the kernel oopses during suspend operations.
The suggested fix is to release all resources during errors in probe_continue(), and use fw_state to track resource allocation state, so that .remove does not attempt to release the same hardware resources twice. PM operations are also modified so that no action is done if DSP resources have been freed due to an error at probe.
Reported-by: Takashi Iwai tiwai@suse.de Co-developed-by: Kai Vehmanen kai.vehmanen@linux.intel.com Signed-off-by: Kai Vehmanen kai.vehmanen@linux.intel.com Bugzilla: http://bugzilla.suse.com/show_bug.cgi?id=1161246 Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Reviewed-by: Takashi Iwai tiwai@suse.de Link: https://lore.kernel.org/r/20200124213625.30186-4-pierre-louis.bossart@linux.... Signed-off-by: Mark Brown broonie@kernel.org Cc: stable@vger.kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- sound/soc/sof/core.c | 32 +++++++++++--------------------- sound/soc/sof/pm.c | 4 ++++ 2 files changed, 15 insertions(+), 21 deletions(-)
diff --git a/sound/soc/sof/core.c b/sound/soc/sof/core.c index f9ebdf2cfc31d..12aec140819a2 100644 --- a/sound/soc/sof/core.c +++ b/sound/soc/sof/core.c @@ -440,7 +440,6 @@ static int sof_probe_continue(struct snd_sof_dev *sdev)
return 0;
-#if !IS_ENABLED(CONFIG_SND_SOC_SOF_PROBE_WORK_QUEUE) fw_trace_err: snd_sof_free_trace(sdev); fw_run_err: @@ -451,22 +450,10 @@ static int sof_probe_continue(struct snd_sof_dev *sdev) snd_sof_free_debug(sdev); dbg_err: snd_sof_remove(sdev); -#else - - /* - * when the probe_continue is handled in a work queue, the - * probe does not fail so we don't release resources here. - * They will be released with an explicit call to - * snd_sof_device_remove() when the PCI/ACPI device is removed - */ - -fw_trace_err: -fw_run_err: -fw_load_err: -ipc_err: -dbg_err:
-#endif + /* all resources freed, update state to match */ + sdev->fw_state = SOF_FW_BOOT_NOT_STARTED; + sdev->first_boot = true;
return ret; } @@ -545,10 +532,12 @@ int snd_sof_device_remove(struct device *dev) if (IS_ENABLED(CONFIG_SND_SOC_SOF_PROBE_WORK_QUEUE)) cancel_work_sync(&sdev->probe_work);
- snd_sof_fw_unload(sdev); - snd_sof_ipc_free(sdev); - snd_sof_free_debug(sdev); - snd_sof_free_trace(sdev); + if (sdev->fw_state > SOF_FW_BOOT_NOT_STARTED) { + snd_sof_fw_unload(sdev); + snd_sof_ipc_free(sdev); + snd_sof_free_debug(sdev); + snd_sof_free_trace(sdev); + }
/* * Unregister machine driver. This will unbind the snd_card which @@ -564,7 +553,8 @@ int snd_sof_device_remove(struct device *dev) * scheduled on, when they are unloaded. Therefore, the DSP must be * removed only after the topology has been unloaded. */ - snd_sof_remove(sdev); + if (sdev->fw_state > SOF_FW_BOOT_NOT_STARTED) + snd_sof_remove(sdev);
/* release firmware */ release_firmware(pdata->fw); diff --git a/sound/soc/sof/pm.c b/sound/soc/sof/pm.c index e9fbac38d9238..195af259e78e3 100644 --- a/sound/soc/sof/pm.c +++ b/sound/soc/sof/pm.c @@ -269,6 +269,10 @@ static int sof_resume(struct device *dev, bool runtime_resume) if (!sof_ops(sdev)->resume || !sof_ops(sdev)->runtime_resume) return 0;
+ /* DSP was never successfully started, nothing to resume */ + if (sdev->first_boot) + return 0; + /* * if the runtime_resume flag is set, call the runtime_resume routine * or else call the system resume routine