Question about hdac_ext_link ref_count management

[Ranjani Sridharan]

Hi Takashi,

While exploring some power optimizations on Intel platforms, I noticed
that the hdac_ext_link ref_count is incremented during codec probe
in hdac_hda_codec_probe() and the ref_count is held until the codec
device is removed. 

I was wondering if it would be possible to call the get/put for the
hdac_ext_link in the codec runtime suspend/resume callbacks so that the
link is powered up only when the link is in use. Are there any
downsides to doing this? 

Thanks,
Ranjani