Skip to content

drm_hwcomposer: Add refcount for GEM handle

The linux kernel doesn't provide reference counting for the handle returned by FD_TO_HANDLE ioctl. It means that if the same Gralloc buffer is imported twice, the first GEM_CLOSE will destroy the handle even if it is still in use by another import.

Remedy this issue by doing the reference counting directly in the DRM generic platform support: ImportHandle() will increase the reference, while ReleaseHandle() will decrease and close it, if necessary.

Signed-off-by: Vincent Donnefort

Merge request reports