[PATCH] ASoC: Intel: Skylake: Check the kcontrol against NULL

[Lukasz Majczak]

There is no check for the kcontrol against NULL and in some cases
it causes kernel to crash.

Fixes: 2d744ecf2b984 ("ASoC: Intel: Skylake: Automatic DMIC format 
configuration according to information from NHLT")
Cc: <sta...@vger.kernel.org> # 5.4+
Signed-off-by: Lukasz Majczak <l...@semihalf.com>
---
 sound/soc/intel/skylake/skl-topology.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/sound/soc/intel/skylake/skl-topology.c 
b/sound/soc/intel/skylake/skl-topology.c
index ae466cd592922..c9abbe4ff0ba3 100644
--- a/sound/soc/intel/skylake/skl-topology.c
+++ b/sound/soc/intel/skylake/skl-topology.c
@@ -3618,12 +3618,18 @@ static void skl_tplg_complete(struct snd_soc_component 
*component)
        int i;
 
        list_for_each_entry(dobj, &component->dobj_list, list) {
-               struct snd_kcontrol *kcontrol = dobj->control.kcontrol;
-               struct soc_enum *se =
-                       (struct soc_enum *)kcontrol->private_value;
-               char **texts = dobj->control.dtexts;
+               struct snd_kcontrol *kcontrol;
+               struct soc_enum *se;
+               char **texts;
                char chan_text[4];
 
+               kcontrol = dobj->control.kcontrol;
+               if(!kcontrol)
+                       continue;
+
+               se = (struct soc_enum *)kcontrol->private_value;
+               texts = dobj->control.dtexts;
+
                if (dobj->type != SND_SOC_DOBJ_ENUM ||
                    dobj->control.kcontrol->put !=
                    skl_tplg_multi_config_set_dmic)

base-commit: 69fe63aa100220c8fd1f451dd54dd0895df1441d
-- 
2.25.1