asoc: add missing null check for pcm pointer of snd_pcm_volume

In platform driver volume controls, add null check for
pcm pointer of struct snd_pcm_volume.

Change-Id: Icc139ae7dde0d45a3101b185ac69381df9e5e6c5
Signed-off-by: xsang <xsang@codeaurora.org>

3 files changed, 79 insertions, 12 deletions

diff --git a/sound/soc/msm/qdsp6v2/msm-pcm-loopback-v2.c b/sound/soc/msm/qdsp6v2/msm-pcm-loopback-v2.c
index 0add46fb979f..24f9740a9511 100644
--- a/sound/soc/msm/qdsp6v2/msm-pcm-loopback-v2.c
+++ b/sound/soc/msm/qdsp6v2/msm-pcm-loopback-v2.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2013-2019, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2013-2020, The Linux Foundation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
@@ -545,11 +545,23 @@ static int msm_pcm_volume_ctl_put(struct snd_kcontrol *kcontrol,
 {
 	int rc = 0;
 	struct snd_pcm_volume *vol = kcontrol->private_data;
-	struct snd_pcm_substream *substream = vol->pcm->streams[0].substream;
+	struct snd_pcm_substream *substream = NULL;
 	struct msm_pcm_loopback *prtd;
 	int volume = ucontrol->value.integer.value[0];
 
 	pr_debug("%s: volume : 0x%x\n", __func__, volume);
+
+	if (!vol) {
+		pr_err("%s: vol is NULL\n", __func__);
+		return -ENODEV;
+	}
+
+	if (!vol->pcm) {
+		pr_err("%s: vol->pcm is NULL\n", __func__);
+		return -ENODEV;
+	}
+
+	substream = vol->pcm->streams[0].substream;
 	mutex_lock(&loopback_session_lock);
 	if ((!substream) || (!substream->runtime)) {
 		pr_err("%s substream or runtime not found\n", __func__);
@@ -579,6 +591,19 @@ static int msm_pcm_volume_ctl_get(struct snd_kcontrol *kcontrol,
 	struct msm_pcm_loopback *prtd;
 
 	pr_debug("%s\n", __func__);
+
+	if (!vol) {
+		pr_err("%s: vol is NULL\n", __func__);
+		return -ENODEV;
+	}
+
+	if (!vol->pcm) {
+		pr_err("%s: vol->pcm is NULL\n", __func__);
+		return -ENODEV;
+	}
+
+	substream = vol->pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
+
 	if ((!substream) || (!substream->runtime)) {
 		pr_err("%s substream or runtime not found\n", __func__);
 		rc = -ENODEV;
diff --git a/sound/soc/msm/qdsp6v2/msm-pcm-q6-noirq.c b/sound/soc/msm/qdsp6v2/msm-pcm-q6-noirq.c
index 5c78349f8d70..4ef4ae7d72c8 100644
--- a/sound/soc/msm/qdsp6v2/msm-pcm-q6-noirq.c
+++ b/sound/soc/msm/qdsp6v2/msm-pcm-q6-noirq.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2016-2017, 2019 The Linux Foundation. All rights reserved.
+/* Copyright (c) 2016-2017, 2019-2020 The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
@@ -662,12 +662,22 @@ static int msm_pcm_volume_ctl_get(struct snd_kcontrol *kcontrol,
 {
 	struct snd_pcm_volume *vol = snd_kcontrol_chip(kcontrol);
 	struct msm_plat_data *pdata = NULL;
-	struct snd_pcm_substream *substream =
-		vol->pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
+	struct snd_pcm_substream *substream = NULL;
 	struct snd_soc_pcm_runtime *soc_prtd = NULL;
 	struct msm_audio *prtd;
 
 	pr_debug("%s\n", __func__);
+	if (!vol) {
+		pr_err("%s: vol is NULL\n", __func__);
+		return -ENODEV;
+	}
+
+	if (!vol->pcm) {
+		pr_err("%s: vol->pcm is NULL\n", __func__);
+		return -ENODEV;
+	}
+
+	substream = vol->pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
 	if (!substream) {
 		pr_err("%s substream not found\n", __func__);
 		return -ENODEV;
@@ -699,13 +709,25 @@ static int msm_pcm_volume_ctl_put(struct snd_kcontrol *kcontrol,
 	int rc = 0;
 	struct snd_pcm_volume *vol = snd_kcontrol_chip(kcontrol);
 	struct msm_plat_data *pdata = NULL;
-	struct snd_pcm_substream *substream =
-		vol->pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
+	struct snd_pcm_substream *substream = NULL;
 	struct snd_soc_pcm_runtime *soc_prtd = NULL;
 	struct msm_audio *prtd;
 	int volume = ucontrol->value.integer.value[0];
 
 	pr_debug("%s: volume : 0x%x\n", __func__, volume);
+
+	if (!vol) {
+		pr_err("%s: vol is NULL\n", __func__);
+		return -ENODEV;
+	}
+
+	if (!vol->pcm) {
+		pr_err("%s: vol->pcm is NULL\n", __func__);
+		return -ENODEV;
+	}
+
+	substream = vol->pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
+
 	if (!substream) {
 		pr_err("%s substream not found\n", __func__);
 		return -ENODEV;
diff --git a/sound/soc/msm/qdsp6v2/msm-pcm-q6-v2.c b/sound/soc/msm/qdsp6v2/msm-pcm-q6-v2.c
index b2154620c8ae..c1ef60bd8cba 100644
--- a/sound/soc/msm/qdsp6v2/msm-pcm-q6-v2.c
+++ b/sound/soc/msm/qdsp6v2/msm-pcm-q6-v2.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2012-2019, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
@@ -1389,12 +1389,22 @@ static int msm_pcm_volume_ctl_get(struct snd_kcontrol *kcontrol,
 {
 	struct snd_pcm_volume *vol = snd_kcontrol_chip(kcontrol);
 	struct msm_plat_data *pdata = NULL;
-	struct snd_pcm_substream *substream =
-		vol->pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
+	struct snd_pcm_substream *substream = NULL;
 	struct snd_soc_pcm_runtime *soc_prtd = NULL;
 	struct msm_audio *prtd;
 
 	pr_debug("%s\n", __func__);
+	if (!vol) {
+		pr_err("%s: vol is NULL\n", __func__);
+		return -ENODEV;
+	}
+
+	if (!vol->pcm) {
+		pr_err("%s: vol->pcm is NULL\n", __func__);
+		return -ENODEV;
+	}
+	substream = vol->pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
+
 	if (!substream) {
 		pr_err("%s substream not found\n", __func__);
 		return -ENODEV;
@@ -1426,14 +1436,24 @@ static int msm_pcm_volume_ctl_put(struct snd_kcontrol *kcontrol,
 {
 	int rc = 0;
 	struct snd_pcm_volume *vol = snd_kcontrol_chip(kcontrol);
-	struct snd_pcm_substream *substream =
-		vol->pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
+	struct snd_pcm_substream *substream = NULL;
 	struct msm_audio *prtd;
 	int volume = ucontrol->value.integer.value[0];
 	struct snd_soc_pcm_runtime *soc_prtd = NULL;
 	struct msm_plat_data *pdata = NULL;
 
 	pr_debug("%s: volume : 0x%x\n", __func__, volume);
+	if (!vol) {
+		pr_err("%s: vol is NULL\n", __func__);
+		return -ENODEV;
+	}
+
+	if (!vol->pcm) {
+		pr_err("%s: vol->pcm is NULL\n", __func__);
+		return -ENODEV;
+	}
+
+	substream = vol->pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
 	if (!substream) {
 		pr_err("%s: substream not found\n", __func__);
 		return -ENODEV;