dsp: codecs: Add spin_lock_irqsave instead of spin_lock

spin_lock is acquired in process context and trying do the
operation in process context,while the interrupt came and
the same lock is trying to take in interrupt context which
leads to deadlock.To avoid this we are using spin_lock_irqsave
instead of spin_lock.

Change-Id: I9c4a3ac65d92b0612d7c4845212647c51a72065b
Signed-off-by: Prasad Kumpatla <nkumpat@codeaurora.org>

dsp/codecs/audio_utils.c

@@ -936,6 +936,7 @@ ssize_t audio_in_write(struct file *file,
 
 int audio_in_release(struct inode *inode, struct file *file)
 {
+	unsigned long flags = 0;
 	struct q6audio_in  *audio = file->private_data;
 
 	pr_info("%s: session id %d\n", __func__, audio->ac->session);
@@ -943,11 +944,11 @@ int audio_in_release(struct inode *inode, struct file *file)
 	audio_in_disable(audio);
 	q6asm_audio_client_free(audio->ac);
 	mutex_unlock(&audio->lock);
-	spin_lock(&enc_dec_lock);
+	spin_lock_irqsave(&enc_dec_lock, flags);
 	kfree(audio->enc_cfg);
 	kfree(audio->codec_cfg);
 	kfree(audio);
 	file->private_data = NULL;
-	spin_unlock(&enc_dec_lock);
+	spin_unlock_irqrestore(&enc_dec_lock, flags);
 	return 0;
 }

dsp/codecs/audio_utils_aio.c

@@ -588,6 +588,7 @@ int enable_volume_ramp(struct q6audio_aio *audio)
 
 int audio_aio_release(struct inode *inode, struct file *file)
 {
+	unsigned long flags = 0;
 	struct q6audio_aio *audio = file->private_data;
 
 	pr_debug("%s[%pK]\n", __func__, audio);
@@ -631,11 +632,11 @@ int audio_aio_release(struct inode *inode, struct file *file)
 #ifdef CONFIG_DEBUG_FS
 	debugfs_remove(audio->dentry);
 #endif
-	spin_lock(&enc_dec_lock);
+	spin_lock_irqsave(&enc_dec_lock, flags);
 	kfree(audio->codec_cfg);
 	kfree(audio);
 	file->private_data = NULL;
-	spin_unlock(&enc_dec_lock);
+	spin_unlock_irqrestore(&enc_dec_lock, flags);
 	mutex_unlock(&lock);
 	return 0;
 }

dsp/codecs/q6audio_v2.c

@@ -20,8 +20,9 @@ void q6asm_in_cb(uint32_t opcode, uint32_t token,
 {
 	struct q6audio_in *audio = (struct q6audio_in *)priv;
 	unsigned long flags;
+	unsigned long en_de_flags;
 
-	spin_lock(&enc_dec_lock);
+	spin_lock_irqsave(&enc_dec_lock, en_de_flags);
 	if (audio == NULL) {
 		pr_err("%s: failed to get q6audio value\n", __func__);
 		goto error;
@@ -65,7 +66,7 @@ void q6asm_in_cb(uint32_t opcode, uint32_t token,
 	}
 	spin_unlock_irqrestore(&audio->dsp_lock, flags);
 error:
-	spin_unlock(&enc_dec_lock);
+	spin_unlock_irqrestore(&enc_dec_lock, en_de_flags);
 }
 
 void  audio_in_get_dsp_frames(void *priv,

dsp/codecs/q6audio_v2_aio.c

@@ -43,8 +43,9 @@ void audio_aio_cb(uint32_t opcode, uint32_t token,
 {
 	struct q6audio_aio *audio = (struct q6audio_aio *)priv;
 	union msm_audio_event_payload e_payload;
+	unsigned long flags = 0;
 
-	spin_lock(&enc_dec_lock);
+	spin_lock_irqsave(&enc_dec_lock, flags);
 	if (audio == NULL) {
 		pr_err("%s: failed to get q6audio value\n", __func__);
 		goto error;
@@ -115,7 +116,7 @@ void audio_aio_cb(uint32_t opcode, uint32_t token,
 		break;
 	}
 error:
-	spin_unlock(&enc_dec_lock);
+	spin_unlock_irqrestore(&enc_dec_lock, flags);
 }
 
 int extract_meta_out_info(struct q6audio_aio *audio,