[PATCH 2/5] ASoC: dapm: allow muxes to force a disconnect

[Jerome Brunet <jbrunet@baylibre.com>]

Let soc_dapm_mux_update_power() accept NULL as 'e' enum.

It makes the code a bit more robust and, more importantly, let the calling
mux force a disconnect of the output path if necessary.

This is useful if the dapm elements following the mux must be off
while updating the mux, to avoid glitches or force a (re)configuration.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
---
 sound/soc/soc-dapm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index 81a7a12196ff..a4d6c068b545 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -2245,7 +2245,7 @@ static int soc_dapm_mux_update_power(struct snd_soc_card *card,
 	dapm_kcontrol_for_each_path(path, kcontrol) {
 		found = 1;
 		/* we now need to match the string in the enum to the path */
-		if (!(strcmp(path->name, e->texts[mux])))
+		if (e && !(strcmp(path->name, e->texts[mux])))
 			connect = true;
 		else
 			connect = false;
-- 
2.20.1