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ASoC: SOF: Intel: hda: Make hdac_device device-managed 

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>
This commit is contained in:
Ranjani Sridharan 2019-06-26 00:04:50 -07:00 committed by Mark Brown
parent 5f9e832c13
commit ef9bec2748
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 9 additions and 5 deletions
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8
sound/pci/hda/hda_codec.c
View File

@ -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

6
sound/soc/sof/intel/hda-codec.c
View File

@ -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;