Since: 83bfc7e793b5 ("ASoC: SOF: core: unregister clients and machine drivers in .shutdown") we wait for all the workloads to be completed during shutdown. This was done to avoid a stall once the device is started again.
Unfortunately this has the side effect of stalling kexec(), if the userspace is frozen. Let's handle that case.
To: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com To: Liam Girdwood lgirdwood@gmail.com To: Peter Ujfalusi peter.ujfalusi@linux.intel.com To: Bard Liao yung-chuan.liao@linux.intel.com To: Ranjani Sridharan ranjani.sridharan@linux.intel.com To: Kai Vehmanen kai.vehmanen@linux.intel.com To: Daniel Baluta daniel.baluta@nxp.com To: Mark Brown broonie@kernel.org To: Jaroslav Kysela perex@perex.cz To: Takashi Iwai tiwai@suse.com To: Eric Biederman ebiederm@xmission.com To: Chromeos Kdump chromeos-kdump@google.com To: Steven Rostedt rostedt@goodmis.org Cc: stable@vger.kernel.org Cc: sound-open-firmware@alsa-project.org Cc: alsa-devel@alsa-project.org Cc: linux-kernel@vger.kernel.org Cc: kexec@lists.infradead.org Signed-off-by: Ricardo Ribalda ribalda@chromium.org --- Changes in v6: - Check if we are in kexec with the userspace frozen. - Link to v5: https://lore.kernel.org/r/20221127-snd-freeze-v5-0-4ededeb08ba0@chromium.org
Changes in v5: - Edit subject prefix. - Link to v4: https://lore.kernel.org/r/20221127-snd-freeze-v4-0-51ca64b7f2ab@chromium.org
Changes in v4: - Do not call snd_sof_machine_unregister from shutdown. - Link to v3: https://lore.kernel.org/r/20221127-snd-freeze-v3-0-a2eda731ca14@chromium.org
Changes in v3: - Wrap pm_freezing in a function. - Link to v2: https://lore.kernel.org/r/20221127-snd-freeze-v2-0-d8a425ea9663@chromium.org
Changes in v2: - Only use pm_freezing if CONFIG_FREEZER . - Link to v1: https://lore.kernel.org/r/20221127-snd-freeze-v1-0-57461a366ec2@chromium.org
--- Ricardo Ribalda (2): kexec: Introduce kexec_with_frozen_processes ASoC: SOF: Fix deadlock when shutdown a frozen userspace
include/linux/kexec.h | 3 +++ kernel/kexec_core.c | 5 +++++ sound/soc/sof/core.c | 4 +++- 3 files changed, 11 insertions(+), 1 deletion(-) --- base-commit: 4312098baf37ee17a8350725e6e0d0e8590252d4 change-id: 20221127-snd-freeze-1ee143228326
Best regards,