[PATCH] drm/mediatek: fix race condition for HDMI jack status reporting

[CK Hu]

Hi, Tzung-Bi:

On Fri, 2020-02-14 at 15:35 +0800, Tzung-Bi Shih wrote:
> On Fri, Feb 14, 2020 at 3:07 PM CK Hu <ck.hu at mediatek.com> wrote:
> > I think sound driver could be removed for some reason, and fn should be
> > set to NULL before sound driver removed. In this case, codec_dev != NULL
> > and fn == NULL.
> 
> No..if you see sound/soc/codecs/hdmi-codec.c, plugged_cb is statically
> allocated.

It looks like that even though sound driver is removed, hdmi driver
would still callback to sound core. This is so weird. After sound driver
is removed, hdmi driver would callback with codec_dev which is invalid.
I think this may cause some problem.

Regards,
CK