[053/119] ASoC: Fix suspend with active audio streams

[Greg KH]

2.6.31-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx>

commit 50b6bce59d154b5db137907a5c0ed45a4e7a3829 upstream.

When we get a stream suspend event force the power down since otherwise
the stream would remain marked as active.  In future we'll probably want
to make this stream-specific and add an interface to make the power down
of other widgets optional in order to support leaving bypass paths
active while suspending the processor.

Reported-by: Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>
Tested-by: Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>
Acked-by: Liam Girdwood <lrg@xxxxxxxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 sound/soc/soc-dapm.c |   16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -774,9 +774,19 @@ static int dapm_power_widgets(struct snd
 			if (!w->power_check)
 				continue;
 
-			power = w->power_check(w);
-			if (power)
-				sys_power = 1;
+			/* If we're suspending then pull down all the
+			 * power. */
+			switch (event) {
+			case SND_SOC_DAPM_STREAM_SUSPEND:
+				power = 0;
+				break;
+
+			default:
+				power = w->power_check(w);
+				if (power)
+					sys_power = 1;
+				break;
+			}
 
 			if (w->power == power)
 				continue;


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