ipa: camera_sensor_helper: Return unique_ptr from createInstance

Avoid naked pointer with memory allocation by returning a unique_ptr
from CameraSensorHelperFactory::createInstance(), in order to increase
memory allocation safety.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Xavier Roumegue <xavier.roumegue@oss.nxp.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>

2 files changed, 6 insertions, 7 deletions

diff --git a/src/ipa/libipa/camera_sensor_helper.cpp b/src/ipa/libipa/camera_sensor_helper.cpp
index fde9bf5b..3a7d701d 100644
--- a/src/ipa/libipa/camera_sensor_helper.cpp
+++ b/src/ipa/libipa/camera_sensor_helper.cpp
@@ -261,8 +261,7 @@ std::unique_ptr<CameraSensorHelper> CameraSensorHelperFactory::create(const std:
 		if (name != factory->name_)
 			continue;
 
-		CameraSensorHelper *helper = factory->createInstance();
-		return std::unique_ptr<CameraSensorHelper>(helper);
+		return factory->createInstance();
 	}
 
 	return nullptr;
@@ -307,8 +306,8 @@ std::vector<CameraSensorHelperFactory *> &CameraSensorHelperFactory::factories()
  * macro. It creates a camera sensor helper instance associated with the camera
  * sensor model.
  *
- * \return A pointer to a newly constructed instance of the CameraSensorHelper
- * subclass corresponding to the factory
+ * \return A unique pointer to a newly constructed instance of the
+ * CameraSensorHelper subclass corresponding to the factory
  */
 
 /**
diff --git a/src/ipa/libipa/camera_sensor_helper.h b/src/ipa/libipa/camera_sensor_helper.h
index 410156ef..21ee43cc 100644
--- a/src/ipa/libipa/camera_sensor_helper.h
+++ b/src/ipa/libipa/camera_sensor_helper.h
@@ -73,7 +73,7 @@ private:
 
 	static void registerType(CameraSensorHelperFactory *factory);
 
-	virtual CameraSensorHelper *createInstance() const = 0;
+	virtual std::unique_ptr<CameraSensorHelper> createInstance() const = 0;
 
 	std::string name_;
 };
@@ -85,9 +85,9 @@ public: 							\
 	helper##Factory() : CameraSensorHelperFactory(name) {}	\
 								\
 private:							\
-	CameraSensorHelper *createInstance() const		\
+	std::unique_ptr<CameraSensorHelper> createInstance() const \
 	{							\
-		return new helper();				\
+		return std::make_unique<helper>();		\
 	}							\
 };								\
 static helper##Factory global_##helper##Factory;