ASoC: Blackfin I2S: use dai state rather than local counter

Since the active field of the dai already tells us the stream activity,
the local counter variable is redundant and can be replaced.

Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/blackfin/bf5xx-i2s.c b/sound/soc/blackfin/bf5xx-i2s.c
index 1e9d161..fe2c35d 100644
--- a/sound/soc/blackfin/bf5xx-i2s.c
+++ b/sound/soc/blackfin/bf5xx-i2s.c
@@ -49,7 +49,6 @@
 	u16 rcr1;
 	u16 tcr2;
 	u16 rcr2;
-	int counter;
 	int configured;
 };
 
@@ -133,16 +132,6 @@
 	return ret;
 }
 
-static int bf5xx_i2s_startup(struct snd_pcm_substream *substream,
-			     struct snd_soc_dai *dai)
-{
-	pr_debug("%s enter\n", __func__);
-
-	/*this counter is used for counting how many pcm streams are opened*/
-	bf5xx_i2s.counter++;
-	return 0;
-}
-
 static int bf5xx_i2s_hw_params(struct snd_pcm_substream *substream,
 				struct snd_pcm_hw_params *params,
 				struct snd_soc_dai *dai)
@@ -201,9 +190,8 @@
 			       struct snd_soc_dai *dai)
 {
 	pr_debug("%s enter\n", __func__);
-	bf5xx_i2s.counter--;
 	/* No active stream, SPORT is allowed to be configured again. */
-	if (!bf5xx_i2s.counter)
+	if (!dai->active)
 		bf5xx_i2s.configured = 0;
 }
 
@@ -284,7 +272,6 @@
 	SNDRV_PCM_FMTBIT_S32_LE)
 
 static struct snd_soc_dai_ops bf5xx_i2s_dai_ops = {
-	.startup	= bf5xx_i2s_startup,
 	.shutdown	= bf5xx_i2s_shutdown,
 	.hw_params	= bf5xx_i2s_hw_params,
 	.set_fmt	= bf5xx_i2s_set_dai_fmt,