asoc: msm-pcm: Add mutex lock to protect prvt data

Add mutex lock to protect private data in _put() and
get() calls.

Bug: 147101660
Change-Id: I92f5a6515b6d1c4ad650a7dcf22a0a231a84dd30
Signed-off-by: Prasad Kumpatla <nkumpat@codeaurora.org>

3 files changed, 84 insertions, 12 deletions

diff --git a/asoc/msm-pcm-loopback-v2.c b/asoc/msm-pcm-loopback-v2.c
index 32c727ac..7bb20bb4 100644
--- a/asoc/msm-pcm-loopback-v2.c
+++ b/asoc/msm-pcm-loopback-v2.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2013-2018, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2013-2019, 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
@@ -136,7 +136,7 @@ static int msm_loopback_session_mute_put(struct snd_kcontrol *kcontrol,
 		ret = -EINVAL;
 		goto done;
 	}
-
+	mutex_lock(&loopback_session_lock);
 	pr_debug("%s: mute=%d\n", __func__, mute);
 	hfp_tx_mute = mute;
 	for (n = 0; n < LOOPBACK_SESSION_MAX; n++) {
@@ -149,6 +149,7 @@ static int msm_loopback_session_mute_put(struct snd_kcontrol *kcontrol,
 			pr_err("%s: Send mute command failed rc=%d\n",
 				__func__, ret);
 	}
+	 mutex_unlock(&loopback_session_lock);
 done:
 	return ret;
 }
@@ -351,6 +352,8 @@ static void stop_pcm(struct msm_pcm_loopback *pcm)
 
 	if (pcm->audio_client == NULL)
 		return;
+
+	mutex_lock(&loopback_session_lock);
 	q6asm_cmd(pcm->audio_client, CMD_CLOSE);
 
 	if (pcm->playback_substream != NULL) {
@@ -365,6 +368,7 @@ static void stop_pcm(struct msm_pcm_loopback *pcm)
 	}
 	q6asm_audio_client_free(pcm->audio_client);
 	pcm->audio_client = NULL;
+	mutex_unlock(&loopback_session_lock);
 }
 
 static int msm_pcm_close(struct snd_pcm_substream *substream)
@@ -495,12 +499,15 @@ static int msm_pcm_volume_ctl_put(struct snd_kcontrol *kcontrol,
 		rc = -ENODEV;
 		goto exit;
 	}
+	mutex_lock(&loopback_session_lock);
 	prtd = substream->runtime->private_data;
 	if (!prtd) {
 		rc = -ENODEV;
+		mutex_unlock(&loopback_session_lock);
 		goto exit;
 	}
 	rc = pcm_loopback_set_volume(prtd, volume);
+	mutex_unlock(&loopback_session_lock);
 
 exit:
 	return rc;
@@ -521,13 +528,15 @@ static int msm_pcm_volume_ctl_get(struct snd_kcontrol *kcontrol,
 		rc = -ENODEV;
 		goto exit;
 	}
+	mutex_lock(&loopback_session_lock);
 	prtd = substream->runtime->private_data;
 	if (!prtd) {
 		rc = -ENODEV;
+		mutex_unlock(&loopback_session_lock);
 		goto exit;
 	}
 	ucontrol->value.integer.value[0] = prtd->volume;
-
+	mutex_unlock(&loopback_session_lock);
 exit:
 	return rc;
 }
diff --git a/asoc/msm-pcm-q6-noirq.c b/asoc/msm-pcm-q6-noirq.c
index e2abebe8..af2fdff6 100644
--- a/asoc/msm-pcm-q6-noirq.c
+++ b/asoc/msm-pcm-q6-noirq.c
@@ -15,6 +15,7 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/time.h>
+#include <linux/mutex.h>
 #include <linux/wait.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
@@ -615,6 +616,7 @@ static int msm_pcm_prepare(struct snd_pcm_substream *substream)
 
 static int msm_pcm_close(struct snd_pcm_substream *substream)
 {
+	struct msm_plat_data *pdata = NULL;
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct snd_soc_pcm_runtime *soc_prtd = substream->private_data;
 	struct msm_audio *prtd = runtime->private_data;
@@ -623,6 +625,20 @@ static int msm_pcm_close(struct snd_pcm_substream *substream)
 	int dir = 0;
 	int ret = 0;
 
+	if (!soc_prtd) {
+		pr_debug("%s private_data not found\n",
+			__func__);
+		return 0;
+	}
+
+        pdata = (struct msm_plat_data *)
+			dev_get_drvdata(soc_prtd->platform->dev);
+        if (!pdata) {
+                pr_err("%s: pdata not found\n", __func__);
+               return -ENODEV;
+        }
+
+	mutex_lock(&pdata->lock);
 	if (ac) {
 		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 			dir = IN;
@@ -657,6 +673,7 @@ static int msm_pcm_close(struct snd_pcm_substream *substream)
 					 SNDRV_PCM_STREAM_CAPTURE);
 	kfree(prtd);
 	runtime->private_data = NULL;
+	mutex_unlock(&pdata->lock);
 
 	return 0;
 }
@@ -681,8 +698,10 @@ static int msm_pcm_volume_ctl_get(struct snd_kcontrol *kcontrol,
 		      struct snd_ctl_elem_value *ucontrol)
 {
 	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_soc_pcm_runtime *soc_prtd = NULL;
 	struct msm_audio *prtd;
 
 	pr_debug("%s\n", __func__);
@@ -690,13 +709,24 @@ static int msm_pcm_volume_ctl_get(struct snd_kcontrol *kcontrol,
 		pr_err("%s substream not found\n", __func__);
 		return -ENODEV;
 	}
-	if (!substream->runtime) {
-		pr_debug("%s substream runtime not found\n", __func__);
+	soc_prtd = substream->private_data;
+	if (!substream->runtime || !soc_prtd) {
+		pr_debug("%s substream runtime or private_data not found\n",
+				 __func__);
 		return 0;
 	}
+
+        pdata = (struct msm_plat_data *)
+			dev_get_drvdata(soc_prtd->platform->dev);
+        if (!pdata) {
+                pr_err("%s: pdata not found\n", __func__);
+               return -ENODEV;
+        }
+	mutex_lock(&pdata->lock);
 	prtd = substream->runtime->private_data;
 	if (prtd)
 		ucontrol->value.integer.value[0] = prtd->volume;
+	mutex_unlock(&pdata->lock);
 	return 0;
 }
 
@@ -705,8 +735,10 @@ 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_soc_pcm_runtime *soc_prtd = NULL;
 	struct msm_audio *prtd;
 	int volume = ucontrol->value.integer.value[0];
 
@@ -715,15 +747,26 @@ static int msm_pcm_volume_ctl_put(struct snd_kcontrol *kcontrol,
 		pr_err("%s substream not found\n", __func__);
 		return -ENODEV;
 	}
-	if (!substream->runtime) {
-		pr_err("%s substream runtime not found\n", __func__);
+	soc_prtd = substream->private_data;
+	if (!substream->runtime || !soc_prtd) {
+		pr_err("%s substream runtime or private_data not found\n",
+				 __func__);
 		return 0;
 	}
+
+        pdata = (struct msm_plat_data *)
+			dev_get_drvdata(soc_prtd->platform->dev);
+        if (!pdata) {
+                pr_err("%s: pdata not found\n", __func__);
+               return -ENODEV;
+        }
+	mutex_lock(&pdata->lock);
 	prtd = substream->runtime->private_data;
 	if (prtd) {
 		rc = msm_pcm_set_volume(prtd, volume);
 		prtd->volume = volume;
 	}
+	mutex_unlock(&pdata->lock);
 	return rc;
 }
 
@@ -1303,6 +1346,8 @@ static int msm_pcm_probe(struct platform_device *pdev)
 
 	pdata->perf_mode = perf_mode;
 
+	mutex_init(&pdata->lock);
+
 	dev_set_drvdata(&pdev->dev, pdata);
 
 	dev_dbg(&pdev->dev, "%s: dev name %s\n",
@@ -1323,6 +1368,7 @@ static int msm_pcm_remove(struct platform_device *pdev)
 
 	dev_dbg(&pdev->dev, "Pull mode remove\n");
 	pdata = dev_get_drvdata(&pdev->dev);
+	mutex_destroy(&pdata->lock);
 	devm_kfree(&pdev->dev, pdata);
 	snd_soc_unregister_platform(&pdev->dev);
 	return 0;
diff --git a/asoc/msm-pcm-q6-v2.c b/asoc/msm-pcm-q6-v2.c
index 897d758c..22a40d69 100644
--- a/asoc/msm-pcm-q6-v2.c
+++ b/asoc/msm-pcm-q6-v2.c
@@ -1196,10 +1196,10 @@ static int msm_pcm_adsp_stream_cmd_put(struct snd_kcontrol *kcontrol,
 
 	if (!pdata) {
 		pr_err("%s pdata is NULL\n", __func__);
-		ret = -ENODEV;
-		goto done;
+		return -ENODEV;
 	}
 
+	mutex_lock(&pdata->lock);
 	substream = pdata->pcm[kcontrol->private_value]->
 			streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
 	if (!substream) {
@@ -1221,7 +1221,6 @@ static int msm_pcm_adsp_stream_cmd_put(struct snd_kcontrol *kcontrol,
 		goto done;
 	}
 
-	mutex_lock(&pdata->lock);
 	event_data = (struct msm_adsp_event_data *)ucontrol->value.bytes.data;
 	if ((event_data->event_type < ADSP_STREAM_PP_EVENT) ||
 	    (event_data->event_type >= ADSP_STREAM_EVENT_MAX)) {
@@ -1382,8 +1381,10 @@ static int msm_pcm_volume_ctl_get(struct snd_kcontrol *kcontrol,
 		      struct snd_ctl_elem_value *ucontrol)
 {
 	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_soc_pcm_runtime *soc_prtd = NULL;
 	struct msm_audio *prtd;
 
 	pr_debug("%s\n", __func__);
@@ -1391,13 +1392,25 @@ static int msm_pcm_volume_ctl_get(struct snd_kcontrol *kcontrol,
 		pr_err("%s substream not found\n", __func__);
 		return -ENODEV;
 	}
-	if (!substream->runtime) {
-		pr_debug("%s substream runtime not found\n", __func__);
+	soc_prtd = substream->private_data;
+	if (!substream->runtime || !soc_prtd) {
+		pr_debug("%s substream runtime or private_data not found\n",
+				__func__);
 		return 0;
 	}
+
+	pdata = (struct msm_plat_data *)
+			dev_get_drvdata(soc_prtd->platform->dev);
+	if (!pdata) {
+		pr_err("%s: pdata not found\n", __func__);
+		return -ENODEV;
+	}
+
+	mutex_lock(&pdata->lock);
 	prtd = substream->runtime->private_data;
 	if (prtd)
 		ucontrol->value.integer.value[0] = prtd->volume;
+	mutex_unlock(&pdata->lock);
 	return 0;
 }
 
@@ -1501,9 +1514,11 @@ static int msm_pcm_compress_ctl_get(struct snd_kcontrol *kcontrol,
 		pr_debug("%s substream runtime not found\n", __func__);
 		return 0;
 	}
+	mutex_lock(&pdata->lock);
 	prtd = substream->runtime->private_data;
 	if (prtd)
 		ucontrol->value.integer.value[0] = prtd->compress_enable;
+	mutex_unlock(&pdata->lock);
 	return 0;
 }
 
@@ -1533,12 +1548,14 @@ static int msm_pcm_compress_ctl_put(struct snd_kcontrol *kcontrol,
 		pr_err("%s substream runtime not found\n", __func__);
 		return 0;
 	}
+	mutex_lock(&pdata->lock);
 	prtd = substream->runtime->private_data;
 	if (prtd) {
 		pr_debug("%s: setting compress flag to 0x%x\n",
 		__func__, compress);
 		prtd->compress_enable = compress;
 	}
+	mutex_unlock(&pdata->lock);
 	return rc;
 }