QCamera2/HAL3: correct mutex lock/unlock sequence

Bug: 36716469
CRs-Fixed: 2053027
Change-Id: I6699c3682eec419fb6efb0583e9909e5739476a0
(cherry picked from commit aa3b55c1b278c52d8e93853c9f89e8a475d59026)
diff --git a/camera/QCamera2/HAL3/QCamera3HWI.cpp b/camera/QCamera2/HAL3/QCamera3HWI.cpp
index 3d17918..8ab7102 100644
--- a/camera/QCamera2/HAL3/QCamera3HWI.cpp
+++ b/camera/QCamera2/HAL3/QCamera3HWI.cpp
@@ -3948,6 +3948,7 @@
                 (mLinkedCameraId != mCameraId) ) {
                 LOGE("Dualcam: mLinkedCameraId %d is invalid, current cam id = %d",
                     mLinkedCameraId, mCameraId);
+                pthread_mutex_unlock(&mMutex);
                 goto error_exit;
             }
         }
@@ -3965,6 +3966,7 @@
             if (sessionId[mLinkedCameraId] == 0xDEADBEEF) {
                 LOGE("Dualcam: Invalid Session Id ");
                 pthread_mutex_unlock(&gCamLock);
+                pthread_mutex_unlock(&mMutex);
                 goto error_exit;
             }
 
@@ -3984,6 +3986,7 @@
                     mCameraHandle->camera_handle, m_pRelCamSyncBuf);
             if (rc < 0) {
                 LOGE("Dualcam: link failed");
+                pthread_mutex_unlock(&mMutex);
                 goto error_exit;
             }
         }
@@ -4183,6 +4186,7 @@
             if(ADD_SET_PARAM_ENTRY_TO_BATCH(mParameters,
                 CAM_INTF_META_FRAME_NUMBER, request->frame_number)) {
                 LOGE("Failed to set the frame number in the parameters");
+                pthread_mutex_unlock(&mMutex);
                 return BAD_VALUE;
             }
         }
@@ -4488,6 +4492,7 @@
             /* Update stream id of all the requested buffers */
             if (ADD_SET_PARAM_ENTRY_TO_BATCH(mParameters, CAM_INTF_META_STREAM_ID, streamsArray)) {
                 LOGE("Failed to set stream type mask in the parameters");
+                pthread_mutex_unlock(&mMutex);
                 return BAD_VALUE;
             }