ALSA: x86: Drop flag_underrun field

The flag_underrun flag is used to indicate to escalate the XRUN
reporting at the next position inquiry, but there is a much simpler
method to achieve it: just call snd_pcm_stop_xrun().
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/x86/intel_hdmi_audio.c

@@ -1297,11 +1297,6 @@ static snd_pcm_uframes_t snd_intelhad_pcm_pointer(
 	if (intelhaddata->drv_status == HAD_DRV_DISCONNECTED)
 		return SNDRV_PCM_POS_XRUN;
 
-	if (intelhaddata->flag_underrun) {
-		intelhaddata->flag_underrun = false;
-		return SNDRV_PCM_POS_XRUN;
-	}
-
 	/* Use a hw register to calculate sub-period position reports.
 	 * This makes PulseAudio happier.
 	 */
@@ -1642,8 +1637,7 @@ static int had_process_buffer_underrun(struct snd_intelhad *intelhaddata)
 
 	if (stream_type == HAD_RUNNING_STREAM) {
 		/* Report UNDERRUN error to above layers */
-		intelhaddata->flag_underrun = true;
-		had_period_elapsed(stream->had_substream);
+		snd_pcm_stop_xrun(stream->had_substream);
 	}
 
 	return 0;
@@ -1965,7 +1959,6 @@ static int hdmi_lpe_audio_probe(struct platform_device *pdev)
 	ctx->drv_status = HAD_DRV_DISCONNECTED;
 	ctx->dev = &pdev->dev;
 	ctx->card = card;
-	ctx->flag_underrun = false;
 	ctx->aes_bits = SNDRV_PCM_DEFAULT_CON_SPDIF;
 	strcpy(card->driver, INTEL_HAD);
 	strcpy(card->shortname, INTEL_HAD);

sound/x86/intel_hdmi_audio.h

@@ -123,7 +123,6 @@ struct snd_intelhad {
 	enum		intel_had_aud_buf_type curr_buf;
 	int		valid_buf_cnt;
 	unsigned int	aes_bits;
-	bool flag_underrun;
 	struct had_stream_data stream_data;
 	spinlock_t had_spinlock;
 	enum		intel_had_aud_buf_type buff_done;