commit f86177dd930680bf939ef33b9977db27628d7aff
author Eino-Ville Talvala <etalvala@google.com> Wed Feb 01 15:27:41 2017 -0800
committer Eino-Ville Talvala <etalvala@google.com> Thu Feb 02 12:13:16 2017 -0800
tree 113868c2d2eef459f6538acd0a6d9ff9ffb1d84d
parent 5337437a1cd62a96a0c772e2ff0738e372d8aa93

CameraBase: Don't return an sp<> by reference

If the server dies, the binder death callback clears out
the global camera service sp<>, and any current references to it
will become quite unhappy.

Test: Camera CTS passes
Bug: 31992879
Change-Id: I2966bed35d0319e3f26e3d4b1b8dc08006a22348

camera/CameraBase.cpp

diff --git a/camera/CameraBase.cpp b/camera/CameraBase.cpp
index 15d7715..72951fc 100644
--- a/camera/CameraBase.cpp
+++ b/camera/CameraBase.cpp
@@ -86,7 +86,7 @@
 
 // establish binder interface to camera service
 template <typename TCam, typename TCamTraits>
-const sp<::android::hardware::ICameraService>& CameraBase<TCam, TCamTraits>::getCameraService()
+const sp<::android::hardware::ICameraService> CameraBase<TCam, TCamTraits>::getCameraService()
 {
     Mutex::Autolock _l(gLock);
     if (gCameraService.get() == 0) {
@@ -118,7 +118,7 @@
     ALOGV("%s: connect", __FUNCTION__);
     sp<TCam> c = new TCam(cameraId);
     sp<TCamCallbacks> cl = c;
-    const sp<::android::hardware::ICameraService>& cs = getCameraService();
+    const sp<::android::hardware::ICameraService> cs = getCameraService();
 
     binder::Status ret;
     if (cs != nullptr) {
@@ -226,7 +226,7 @@
 template <typename TCam, typename TCamTraits>
 status_t CameraBase<TCam, TCamTraits>::getCameraInfo(int cameraId,
         struct hardware::CameraInfo* cameraInfo) {
-    const sp<::android::hardware::ICameraService>& cs = getCameraService();
+    const sp<::android::hardware::ICameraService> cs = getCameraService();
     if (cs == 0) return UNKNOWN_ERROR;
     binder::Status res = cs->getCameraInfo(cameraId, cameraInfo);
     return res.isOk() ? OK : res.serviceSpecificErrorCode();

include/camera/CameraBase.h

diff --git a/include/camera/CameraBase.h b/include/camera/CameraBase.h
index 0692a27..41f8621 100644
--- a/include/camera/CameraBase.h
+++ b/include/camera/CameraBase.h
@@ -115,7 +115,7 @@
     virtual void                     binderDied(const wp<IBinder>& who);
 
     // helper function to obtain camera service handle
-    static const sp<::android::hardware::ICameraService>& getCameraService();
+    static const sp<::android::hardware::ICameraService> getCameraService();
 
     sp<TCamUser>                     mCamera;
     status_t                         mStatus;