The unregister machine drivers call is not safe to do when
kexec is used. Kexec-lite gets blocked with following backtrace:
[ 84.943749] Freezing user space processes ... (elapsed 0.111 seconds) done.
[ 246.784446] INFO: task kexec-lite:5123 blocked for more than 122 seconds.
[ 246.819035] Call Trace:
[ 246.821782] <TASK>
[ 246.824186] __schedule+0x5f9/0x1263
[ 246.828231] schedule+0x87/0xc5
[ 246.831779] snd_card_disconnect_sync+0xb5/0x127
...
[ 246.889249] snd_sof_device_shutdown+0xb4/0x150
[ 246.899317] pci_device_shutdown+0x37/0x61
[ 246.903990] device_shutdown+0x14c/0x1d6
[ 246.908391] kernel_kexec+0x45/0xb9
This reverts commit 83bfc7e793b555291785136c3ae86abcdc046887.
Reported-by: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
Cc: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
Signed-off-by: Kai Vehmanen <kai.vehmanen@xxxxxxxxxxxxxxx>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@xxxxxxxxxxxxxxx>
---
sound/soc/sof/core.c | 9 ---------
1 file changed, 9 deletions(-)
diff --git a/sound/soc/sof/core.c b/sound/soc/sof/core.c
index 3e6141d03770..625977a29d8a 100644
--- a/sound/soc/sof/core.c
+++ b/sound/soc/sof/core.c
@@ -475,19 +475,10 @@ EXPORT_SYMBOL(snd_sof_device_remove);
int snd_sof_device_shutdown(struct device *dev)
{
struct snd_sof_dev *sdev = dev_get_drvdata(dev);
- struct snd_sof_pdata *pdata = sdev->pdata;
if (IS_ENABLED(CONFIG_SND_SOC_SOF_PROBE_WORK_QUEUE))
cancel_work_sync(&sdev->probe_work);
- /*
- * make sure clients and machine driver(s) are unregistered to force
- * all userspace devices to be closed prior to the DSP shutdown sequence
- */
- sof_unregister_clients(sdev);
-
- snd_sof_machine_unregister(sdev, pdata);
-
if (sdev->fw_state == SOF_FW_BOOT_COMPLETE)
return snd_sof_shutdown(sdev);
--
2.38.1
