ALSA: hda - Don't refer ELD when unplugged

When unplugged, we shouldn't refer to ELD information for PCM open
any more.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Cc: <stable@kernel.org>

sound/pci/hda/patch_hdmi.c

@@ -827,7 +827,7 @@ static int hdmi_pcm_open(struct hda_pcm_stream *hinfo,
 		*codec_pars = *hinfo;
 
 	eld = &spec->sink_eld[idx];
-	if (eld->sad_count > 0) {
+	if (eld->eld_valid && eld->sad_count > 0) {
 		hdmi_eld_update_pcm_info(eld, hinfo, codec_pars);
 		if (hinfo->channels_min > hinfo->channels_max ||
 		    !hinfo->rates || !hinfo->formats)