[alsa-devel] [PATCHv3 6/9] WM8971 uses msleep to replace work queue

[Xavier Hsu]

This patch improves WM8971.
We use msleep to replace work queue.
"As suggested by Mark Brown"

Any comments about improving the patch are welcome.
Thanks.

Signed-off-by: Xavier Hsu <xavier.hsu at linaro.org>
Signed-off-by: Andy Green <andy.green at linaro.org>
---
 sound/soc/codecs/wm8971.c |   25 ++-----------------------
 1 file changed, 2 insertions(+), 23 deletions(-)

diff --git a/sound/soc/codecs/wm8971.c b/sound/soc/codecs/wm8971.c
index 20cfdd3..68b4f52 100755
--- a/sound/soc/codecs/wm8971.c
+++ b/sound/soc/codecs/wm8971.c
@@ -36,8 +36,6 @@
 
 #define	WM8971_REG_COUNT	43
 
-static struct workqueue_struct *wm8971_workq;
-
 /* codec private data */
 struct wm8971_priv {
 	unsigned int sysclk;
@@ -774,16 +772,6 @@ static struct snd_soc_dai_driver wm8971_dai = {
 	.ops = &wm8971_dai_ops,
 };
 
-static void wm8971_work(struct work_struct *work)
-{
-	struct snd_soc_dapm_context *dapm =
-		container_of(work, struct snd_soc_dapm_context,
-			     delayed_work.work);
-	struct snd_soc_codec *codec = dapm->codec;
-
-	wm8971_set_bias_level(codec, codec->dapm.bias_level);
-}
-
 static int wm8971_suspend(struct snd_soc_codec *codec)
 {
 	wm8971_set_bias_level(codec, SND_SOC_BIAS_OFF);
@@ -801,8 +789,7 @@ static int wm8971_resume(struct snd_soc_codec *codec)
 		reg = snd_soc_read(codec, WM8971_PWR1) & 0xfe3e;
 		snd_soc_write(codec, WM8971_PWR1, reg | 0x01c0);
 		codec->dapm.bias_level = SND_SOC_BIAS_ON;
-		queue_delayed_work(wm8971_workq, &codec->dapm.delayed_work,
-				   msecs_to_jiffies(1000));
+		msleep(100);
 	}
 
 	return 0;
@@ -813,19 +800,13 @@ static int wm8971_probe(struct snd_soc_codec *codec)
 	int ret = 0;
 	u16 reg;
 
-	INIT_DELAYED_WORK(&codec->dapm.delayed_work, wm8971_work);
-	wm8971_workq = create_workqueue("wm8971");
-	if (wm8971_workq == NULL)
-		return -ENOMEM;
-
 	wm8971_reset(codec);
 
 	/* charge output caps - set vmid to 5k for quick power up */
 	reg = snd_soc_read(codec, WM8971_PWR1) & 0xfe3e;
 	snd_soc_write(codec, WM8971_PWR1, reg | 0x01c0);
 	codec->dapm.bias_level = SND_SOC_BIAS_STANDBY;
-	queue_delayed_work(wm8971_workq, &codec->dapm.delayed_work,
-			   msecs_to_jiffies(1000));
+	msleep(100);
 
 	/* set the update bits */
 	snd_soc_update_bits(codec, WM8971_LDAC, 0x0100, 0x0100);
@@ -846,8 +827,6 @@ static int wm8971_remove(struct snd_soc_codec *codec)
 {
 	wm8971_set_bias_level(codec, SND_SOC_BIAS_OFF);
 
-	if (wm8971_workq)
-		destroy_workqueue(wm8971_workq);
 	return 0;
 }
 
-- 
1.7.9.5