libcamera: media_device: Zero media graph arrays when querying topology

This silences valgrind that otherwise warns about usage of uninitialized
values. While not strictly required as the kernel should fill the whole
arrays in MEDIA_IOC_G_TOPOLOGY, the extra cost, in a non-critical path,
is negligible compared to the ability to run without valgrind warnings.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/src/libcamera/media_device.cpp b/src/libcamera/media_device.cpp
index 4ff9ffe1..cc307dac 100644
--- a/src/libcamera/media_device.cpp
+++ b/src/libcamera/media_device.cpp
@@ -240,10 +240,10 @@ int MediaDevice::populate()
 		delete[] pads;
 		delete[] interfaces;
 
-		ents = new media_v2_entity[topology.num_entities];
-		links = new media_v2_link[topology.num_links];
-		pads = new media_v2_pad[topology.num_pads];
-		interfaces = new media_v2_interface[topology.num_interfaces];
+		ents = new media_v2_entity[topology.num_entities]();
+		links = new media_v2_link[topology.num_links]();
+		pads = new media_v2_pad[topology.num_pads]();
+		interfaces = new media_v2_interface[topology.num_interfaces]();
 
 		version = topology.topology_version;
 	}