libcamera: pipeline: ipu3: frames: Group FrameBuffer operations

Ensure that checks on resource availability are handled first, and then
operate on the queues only after the resources are confirmed as
available.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/libcamera/pipeline/ipu3/frames.cpp

@@ -49,12 +49,13 @@ IPU3Frames::Info *IPU3Frames::create(Request *request)
 		LOG(IPU3, Error) << "Parameters buffer underrun";
 		return nullptr;
 	}
-	FrameBuffer *paramBuffer = availableParamBuffers_.front();
 
 	if (availableStatBuffers_.empty()) {
 		LOG(IPU3, Error) << "Statistics buffer underrun";
 		return nullptr;
 	}
+
+	FrameBuffer *paramBuffer = availableParamBuffers_.front();
 	FrameBuffer *statBuffer = availableStatBuffers_.front();
 
 	availableParamBuffers_.pop();