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Message-Id: <20221127-snd-freeze-v3-0-a2eda731ca14@chromium.org>
Date: Mon, 28 Nov 2022 10:10:12 +0100
From: Ricardo Ribalda <ribalda@...omium.org>
To: Takashi Iwai <tiwai@...e.com>, Len Brown <len.brown@...el.com>,
Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
Mark Brown <broonie@...nel.org>,
Jaroslav Kysela <perex@...ex.cz>, Pavel Machek <pavel@....cz>,
"Rafael J. Wysocki" <rafael@...nel.org>
Cc: alsa-devel@...a-project.org,
"Joel Fernandes (Google)" <joel@...lfernandes.org>,
Ricardo Ribalda <ribalda@...omium.org>,
linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org
Subject: [PATCH v3 0/2] ALSA: core: Fix deadlock when shutdown a frozen userspace
Since 83bfc7e793b5 ("ASoC: SOF: core: unregister clients and machine drivers in .shutdown")
we wait for userspace to close its fds.
But that will never occur with a frozen userspace (like during kexec()).
Lets detect the frozen userpace and act accordingly.
To: Jaroslav Kysela <perex@...ex.cz>
To: Takashi Iwai <tiwai@...e.com>
To: "Rafael J. Wysocki" <rafael@...nel.org>
To: Pavel Machek <pavel@....cz>
To: Len Brown <len.brown@...el.com>
To: Kai Vehmanen <kai.vehmanen@...ux.intel.com>
To: Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>
To: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To: Mark Brown <broonie@...nel.org>
Cc: alsa-devel@...a-project.org
Cc: linux-kernel@...r.kernel.org
Cc: "Joel Fernandes (Google)" <joel@...lfernandes.org>
Cc: linux-pm@...r.kernel.org
Signed-off-by: Ricardo Ribalda <ribalda@...omium.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):
freezer: Add processes_frozen()
ALSA: core: Fix deadlock when shutdown a frozen userspace
include/linux/freezer.h | 2 ++
kernel/freezer.c | 11 +++++++++++
sound/core/init.c | 13 +++++++++++++
3 files changed, 26 insertions(+)
---
base-commit: 4312098baf37ee17a8350725e6e0d0e8590252d4
change-id: 20221127-snd-freeze-1ee143228326
Best regards,
--
Ricardo Ribalda <ribalda@...omium.org>
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