DmaBufAllocator: Make DmaSyncer non-copyable

As DmaSyncer does sync start/end in the c'tor/d'tor, copying a DmaSyncer
instance would trigger sync end earlier than expected. This patch makes
it non-copyable to avoid the issue.

Fixes: 39482d59fe ("DmaBufAllocator: Add Dma Buffer synchronization function & helper class")
Signed-off-by: Harvey Yang <chenghaoyang@chromium.org>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

include/libcamera/internal/dma_buf_allocator.h

@@ -60,9 +60,14 @@ public:
 
 	explicit DmaSyncer(SharedFD fd, SyncType type = SyncType::ReadWrite);
 
+	DmaSyncer(DmaSyncer &&other) = default;
+	DmaSyncer &operator=(DmaSyncer &&other) = default;
+
 	~DmaSyncer();
 
 private:
+	LIBCAMERA_DISABLE_COPY(DmaSyncer)
+
 	void sync(uint64_t step);
 
 	SharedFD fd_;