[PATCH 3.19.y-ckt 078/251] ASoC: tas2552: Fix kernel crash when the codec is loaded but not part of a card

[Kamal Mostafa]

3.19.8-ckt4 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Peter Ujfalusi <peter.ujfalusi at ti.com>

commit 80ba2669ec8c3e6517aa935001f6cb8809bf3df4 upstream.

If the card is not part of any card the tas_data->codec is NULL since it is
set only during snd_soc_codec_driver.probe, which is not yet called.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi at ti.com>
Signed-off-by: Mark Brown <broonie at kernel.org>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 sound/soc/codecs/tas2552.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sound/soc/codecs/tas2552.c b/sound/soc/codecs/tas2552.c
index ae23acd..a073dc9 100644
--- a/sound/soc/codecs/tas2552.c
+++ b/sound/soc/codecs/tas2552.c
@@ -120,6 +120,9 @@ static void tas2552_sw_shutdown(struct tas2552_data *tas_data, int sw_shutdown)
 {
 	u8 cfg1_reg;
 
+	if (!tas_data->codec)
+		return;
+
 	if (sw_shutdown)
 		cfg1_reg = 0;
 	else
-- 
1.9.1