[3.19.y-ckt stable] Patch "ASoC: tas2552: Fix kernel crash when the codec is loaded but not part of a card" has been added to staging queue

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    ASoC: tas2552: Fix kernel crash when the codec is loaded but not part of a card

to the linux-3.19.y-queue branch of the 3.19.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.19.y-queue

This patch is scheduled to be released in version 3.19.y-ckt4.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.19.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

------

>From 792afb0066cc5db002f0f567d20e86085109de53 Mon Sep 17 00:00:00 2001
From: Peter Ujfalusi <peter.ujfalusi at ti.com>
Date: Thu, 4 Jun 2015 16:04:14 +0300
Subject: ASoC: tas2552: Fix kernel crash when the codec is loaded but not part
 of a card

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