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.
Commit cd6111b26280a ("ASoC: hdmi-codec: add channel mapping control") should not have added the kfree(hcp->chmap_info); to the hdmi_codec_remove function.
Signed-off-by: Peter Ujfalusi peter.ujfalusi@ti.com Reviewed-by: Jyri Sarha jsarha@ti.com Tested-by: Jyri Sarha jsarha@ti.com --- Hi,
Changes since v1: - Rebased on mainline (4.16-rc2)
Mainline does not have devm_ version of snd_soc_register_codec(), the hdmi_codec_remove callback can not be removed.
Regards, Peter
sound/soc/codecs/hdmi-codec.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/sound/soc/codecs/hdmi-codec.c b/sound/soc/codecs/hdmi-codec.c index 5672e516bec3..c1830ccd3bb8 100644 --- a/sound/soc/codecs/hdmi-codec.c +++ b/sound/soc/codecs/hdmi-codec.c @@ -798,12 +798,7 @@ static int hdmi_codec_probe(struct platform_device *pdev)
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); - snd_soc_unregister_codec(dev); + snd_soc_unregister_codec(&pdev->dev);
return 0; }