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ASoC: hdmi-codec: Fix module unloading caused kernel crash 

The hcp->chmap_info must not be freed up in the hdmi_codec_remove()
function as it leads to kernel crash due ALSA core's
pcm_chmap_ctl_private_free() is trying to free it up again when the card
destroyed via snd_card_free.

Since the driver was converted to devm_snd_soc_register_component() the
whole platform_device.remove can be removed.

Commit cd6111b262 ("ASoC: hdmi-codec: add channel mapping control")
should not have added the kfree(hcp->chmap_info); to the hdmi_codec_remove
function.

[Separate verison of the fix for -next -- broonie]

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Peter Ujfalusi 2018-02-20 14:30:10 +02:00 committed by Mark Brown
parent d20aa608f4
commit f1c680f5ef
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1 changed files with 0 additions and 12 deletions
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12
sound/soc/codecs/hdmi-codec.c
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@ -798,23 +798,11 @@ static int hdmi_codec_probe(struct platform_device *pdev)
return 0;
}
static int hdmi_codec_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct hdmi_codec_priv *hcp;
hcp = dev_get_drvdata(dev);
kfree(hcp->chmap_info);
return 0;
}
static struct platform_driver hdmi_codec_driver = {
.driver = {
.name = HDMI_CODEC_DRV_NAME,
},
.probe = hdmi_codec_probe,
.remove = hdmi_codec_remove,
};
module_platform_driver(hdmi_codec_driver);