1 files changed, 39 insertions, 22 deletions

diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index a056b3ef3c84..266895374b83 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -685,33 +685,40 @@ static int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm,
 	return 0;
 }
 
+#if IS_ENABLED(CONFIG_SND_PCM_OSS)
+#define is_oss_stream(substream)	((substream)->oss.oss)
+#else
+#define is_oss_stream(substream)	false
+#endif
+
 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
 			     struct snd_pcm_hw_params *params)
 {
 	struct snd_pcm_runtime *runtime;
-	int err, usecs;
+	int err = 0, usecs;
 	unsigned int bits;
 	snd_pcm_uframes_t frames;
 
 	if (PCM_RUNTIME_CHECK(substream))
 		return -ENXIO;
 	runtime = substream->runtime;
+	mutex_lock(&runtime->buffer_mutex);
 	snd_pcm_stream_lock_irq(substream);
 	switch (runtime->status->state) {
 	case SNDRV_PCM_STATE_OPEN:
 	case SNDRV_PCM_STATE_SETUP:
 	case SNDRV_PCM_STATE_PREPARED:
+		if (!is_oss_stream(substream) &&
+		    atomic_read(&substream->mmap_count))
+			err = -EBADFD;
 		break;
 	default:
-		snd_pcm_stream_unlock_irq(substream);
-		return -EBADFD;
+		err = -EBADFD;
+		break;
 	}
 	snd_pcm_stream_unlock_irq(substream);
-#if IS_ENABLED(CONFIG_SND_PCM_OSS)
-	if (!substream->oss.oss)
-#endif
-		if (atomic_read(&substream->mmap_count))
-			return -EBADFD;
+	if (err)
+		goto unlock;
 
 	snd_pcm_sync_stop(substream, true);
 
@@ -799,16 +806,21 @@ static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
 	if (usecs >= 0)
 		cpu_latency_qos_add_request(&substream->latency_pm_qos_req,
 					    usecs);
-	return 0;
+	err = 0;
  _error:
-	/* hardware might be unusable from this time,
-	   so we force application to retry to set
-	   the correct hardware parameter settings */
-	snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
-	if (substream->ops->hw_free != NULL)
-		substream->ops->hw_free(substream);
-	if (substream->managed_buffer_alloc)
-		snd_pcm_lib_free_pages(substream);
+	if (err) {
+		/* hardware might be unusable from this time,
+		 * so we force application to retry to set
+		 * the correct hardware parameter settings
+		 */
+		snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
+		if (substream->ops->hw_free != NULL)
+			substream->ops->hw_free(substream);
+		if (substream->managed_buffer_alloc)
+			snd_pcm_lib_free_pages(substream);
+	}
+ unlock:
+	mutex_unlock(&runtime->buffer_mutex);
 	return err;
 }
 
@@ -848,26 +860,31 @@ static int do_hw_free(struct snd_pcm_substream *substream)
 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
 {
 	struct snd_pcm_runtime *runtime;
-	int result;
+	int result = 0;
 
 	if (PCM_RUNTIME_CHECK(substream))
 		return -ENXIO;
 	runtime = substream->runtime;
+	mutex_lock(&runtime->buffer_mutex);
 	snd_pcm_stream_lock_irq(substream);
 	switch (runtime->status->state) {
 	case SNDRV_PCM_STATE_SETUP:
 	case SNDRV_PCM_STATE_PREPARED:
+		if (atomic_read(&substream->mmap_count))
+			result = -EBADFD;
 		break;
 	default:
-		snd_pcm_stream_unlock_irq(substream);
-		return -EBADFD;
+		result = -EBADFD;
+		break;
 	}
 	snd_pcm_stream_unlock_irq(substream);
-	if (atomic_read(&substream->mmap_count))
-		return -EBADFD;
+	if (result)
+		goto unlock;
 	result = do_hw_free(substream);
 	snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
 	cpu_latency_qos_remove_request(&substream->latency_pm_qos_req);
+ unlock:
+	mutex_unlock(&runtime->buffer_mutex);
 	return result;
 }