On 02/03/2017 11:10 AM, Vincent Abriou wrote:
> While unregistering the hdmi-codec, the hdmi device list must be
> cleaned up. It avoids kernel page fault when registering again the
> hdmi-codec.
>
> Cc: Liam Girdwood <lgirdwood@xxxxxxxxx>
> Cc: Mark Brown <broonie@xxxxxxxxxx>
> Cc: Jaroslav Kysela <perex@xxxxxxxx>
> Cc: Takashi Iwai <tiwai@xxxxxxxx>
> Cc: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
> Cc: Jyri Sarha <jsarha@xxxxxx>
> Cc: Arnaud Pouliquen <arnaud.pouliquen@xxxxxx>
> Cc: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
>
> Signed-off-by: Vincent Abriou <vincent.abriou@xxxxxx>
> ---
> sound/soc/codecs/hdmi-codec.c | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
>
> diff --git a/sound/soc/codecs/hdmi-codec.c b/sound/soc/codecs/hdmi-codec.c
> index 90b5948..1ca405e 100644
> --- a/sound/soc/codecs/hdmi-codec.c
> +++ b/sound/soc/codecs/hdmi-codec.c
> @@ -479,6 +479,18 @@ static int hdmi_codec_probe(struct platform_device *pdev)
>
> static int hdmi_codec_remove(struct platform_device *pdev)
> {
> + struct device *dev = &pdev->dev;
> + struct list_head *pos;
> +
> + list_for_each(pos, &hdmi_device_list) {
This needs some kind of lock to protect against concurrent iteration and
modification.
> + struct hdmi_device *tmp = pos_to_hdmi_device(pos);
> +
> + if (tmp->dev == dev->parent) {
> + list_del(pos);
> + break;
> + }
> + }
> +
> snd_soc_unregister_codec(&pdev->dev);
> return 0;
> }
>
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