lkml.org 
[lkml]   [2019]   [Oct]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 5.3 039/344] ASoC: SOF: Intel: hda: Make hdac_device device-managed
Date
From: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>

[ Upstream commit ef9bec27485fefb6b93168fea73fda0dc9638046 ]

snd_hdac_ext_bus_device_exit() has been recently modified
to no longer free the hdac device. SOF allocates memory for
hdac_device and hda_hda_priv with kzalloc. Make them
device-managed instead so that they will be freed when the
SOF driver is unloaded.

Because of the above change, hda_codec is device-managed and
it will be freed when the ASoC device is removed. Freeing
the codec in snd_hda_codec_dev_release() leads to kernel
panic while unloading and reloading the ASoC driver. So,
avoid freeing the hda_codec for ASoC driver. This is done in
the same patch to avoid bisect failure.

Signed-off-by: Libin Yang <libin.yang@intel.com>
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20190626070450.7229-1-ranjani.sridharan@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
sound/pci/hda/hda_codec.c | 8 +++++++-
sound/soc/sof/intel/hda-codec.c | 6 ++----
2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 51f10ed9bc432..a2fb19129219e 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -846,7 +846,13 @@ static void snd_hda_codec_dev_release(struct device *dev)
snd_hda_sysfs_clear(codec);
kfree(codec->modelname);
kfree(codec->wcaps);
- kfree(codec);
+
+ /*
+ * In the case of ASoC HD-audio, hda_codec is device managed.
+ * It will be freed when the ASoC device is removed.
+ */
+ if (codec->core.type == HDA_DEV_LEGACY)
+ kfree(codec);
}

#define DEV_NAME_LEN 31
diff --git a/sound/soc/sof/intel/hda-codec.c b/sound/soc/sof/intel/hda-codec.c
index b8b37f0823094..0d8437b080bfa 100644
--- a/sound/soc/sof/intel/hda-codec.c
+++ b/sound/soc/sof/intel/hda-codec.c
@@ -62,8 +62,7 @@ static int hda_codec_probe(struct snd_sof_dev *sdev, int address)
address, resp);

#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
- /* snd_hdac_ext_bus_device_exit will use kfree to free hdev */
- hda_priv = kzalloc(sizeof(*hda_priv), GFP_KERNEL);
+ hda_priv = devm_kzalloc(sdev->dev, sizeof(*hda_priv), GFP_KERNEL);
if (!hda_priv)
return -ENOMEM;

@@ -82,8 +81,7 @@ static int hda_codec_probe(struct snd_sof_dev *sdev, int address)

return 0;
#else
- /* snd_hdac_ext_bus_device_exit will use kfree to free hdev */
- hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
+ hdev = devm_kzalloc(sdev->dev, sizeof(*hdev), GFP_KERNEL);
if (!hdev)
return -ENOMEM;

--
2.20.1


\
 
 \ /
  Last update: 2019-10-03 18:40    [W:0.729 / U:4.024 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site