[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20200915140635.384245885@linuxfoundation.org>
Date: Tue, 15 Sep 2020 16:13:01 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Rander Wang <rander.wang@...el.com>,
Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
Bard Liao <yung-chuan.liao@...ux.intel.com>,
Guennadi Liakhovetski <guennadi.liakhovetski@...ux.intel.com>,
Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
Takashi Iwai <tiwai@...e.de>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 36/78] ALSA: hda: fix a runtime pm issue in SOF when integrated GPU is disabled
From: Rander Wang <rander.wang@...el.com>
[ Upstream commit 13774d81f38538c5fa2924bdcdfa509155480fa6 ]
In snd_hdac_device_init pm_runtime_set_active is called to
increase child_count in parent device. But when it is failed
to build connection with GPU for one case that integrated
graphic gpu is disabled, snd_hdac_ext_bus_device_exit will be
invoked to clean up a HD-audio extended codec base device. At
this time the child_count of parent is not decreased, which
makes parent device can't get suspended.
This patch calls pm_runtime_set_suspended to decrease child_count
in parent device in snd_hdac_device_exit to match with
snd_hdac_device_init. pm_runtime_set_suspended can make sure that
it will not decrease child_count if the device is already suspended.
Signed-off-by: Rander Wang <rander.wang@...el.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@...ux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@...ux.intel.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen@...ux.intel.com>
Link: https://lore.kernel.org/r/20200902154218.1440441-1-kai.vehmanen@linux.intel.com
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
sound/hda/hdac_device.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/sound/hda/hdac_device.c b/sound/hda/hdac_device.c
index dbf02a3a8d2f2..58b53a4bc4d01 100644
--- a/sound/hda/hdac_device.c
+++ b/sound/hda/hdac_device.c
@@ -124,6 +124,8 @@ EXPORT_SYMBOL_GPL(snd_hdac_device_init);
void snd_hdac_device_exit(struct hdac_device *codec)
{
pm_runtime_put_noidle(&codec->dev);
+ /* keep balance of runtime PM child_count in parent device */
+ pm_runtime_set_suspended(&codec->dev);
snd_hdac_bus_remove_device(codec->bus, codec);
kfree(codec->vendor_name);
kfree(codec->chip_name);
--
2.25.1
Powered by blists - more mailing lists