4 files changed, 13 insertions, 7 deletions
diff --git a/src/libcamera/include/v4l2_controls.h b/src/libcamera/include/v4l2_controls.h
index 133f5262..4d7ac1a1 100644
--- a/src/libcamera/include/v4l2_controls.h
+++ b/src/libcamera/include/v4l2_controls.h
@@ -28,13 +28,14 @@ public:
 class V4L2ControlInfo
 {
 public:
-	V4L2ControlInfo(const struct v4l2_query_ext_ctrl &ctrl);
+	V4L2ControlInfo(const V4L2ControlId &id,
+			const struct v4l2_query_ext_ctrl &ctrl);
 
-	const ControlId &id() const { return id_; }
+	const ControlId &id() const { return *id_; }
 	const ControlRange &range() const { return range_; }
 
 private:
-	V4L2ControlId id_;
+	const V4L2ControlId *id_;
 	ControlRange range_;
 };
 
diff --git a/src/libcamera/include/v4l2_device.h b/src/libcamera/include/v4l2_device.h
index daa762d5..5a5b8582 100644
--- a/src/libcamera/include/v4l2_device.h
+++ b/src/libcamera/include/v4l2_device.h
@@ -8,7 +8,8 @@
 #define __LIBCAMERA_V4L2_DEVICE_H__
 
 #include <map>
-#include <string>
+#include <memory>
+#include <vector>
 
 #include <linux/videodev2.h>
 
@@ -48,6 +49,7 @@ private:
 			    const struct v4l2_ext_control *v4l2Ctrls,
 			    unsigned int count);
 
+	std::vector<std::unique_ptr<V4L2ControlId>> controlIds_;
 	V4L2ControlInfoMap controls_;
 	std::string deviceNode_;
 	int fd_;
diff --git a/src/libcamera/v4l2_controls.cpp b/src/libcamera/v4l2_controls.cpp
index dcf31b7a..12c4fb27 100644
--- a/src/libcamera/v4l2_controls.cpp
+++ b/src/libcamera/v4l2_controls.cpp
@@ -122,10 +122,12 @@ V4L2ControlId::V4L2ControlId(const struct v4l2_query_ext_ctrl &ctrl)
 
 /**
  * \brief Construct a V4L2ControlInfo from a struct v4l2_query_ext_ctrl
+ * \param[in] id The V4L2 control ID
  * \param[in] ctrl The struct v4l2_query_ext_ctrl as returned by the kernel
  */
-V4L2ControlInfo::V4L2ControlInfo(const struct v4l2_query_ext_ctrl &ctrl)
-	: id_(ctrl)
+V4L2ControlInfo::V4L2ControlInfo(const V4L2ControlId &id,
+				 const struct v4l2_query_ext_ctrl &ctrl)
+	: id_(&id)
 {
 	if (ctrl.type == V4L2_CTRL_TYPE_INTEGER64)
 		range_ = ControlRange(static_cast<int64_t>(ctrl.minimum),
diff --git a/src/libcamera/v4l2_device.cpp b/src/libcamera/v4l2_device.cpp
index 54cc214e..144a60b4 100644
--- a/src/libcamera/v4l2_device.cpp
+++ b/src/libcamera/v4l2_device.cpp
@@ -386,9 +386,10 @@ void V4L2Device::listControls()
 			continue;
 		}
 
+		controlIds_.emplace_back(utils::make_unique<V4L2ControlId>(ctrl));
 		ctrls.emplace(std::piecewise_construct,
 			      std::forward_as_tuple(ctrl.id),
-			      std::forward_as_tuple(ctrl));
+			      std::forward_as_tuple(*controlIds_.back().get(), ctrl));
 	}
 
 	controls_ = std::move(ctrls);