Thomas Zimmermann <tzimmermann@xxxxxxx> writes: > Do not acquire a reference on the module that provides a client's > callback functions in drm_client_init(). The additional reference > prevents the user from unloading the callback functions' module and > thus creating dangling pointers. > > This is only necessary if there is no direct dependency between the > caller of drm_client_init() and the provider of the callbacks in > struct drm_client_funcs. If this case ever existed, it has been > removed from the DRM code. Callers of drm_client_init() also provide > the callback implementation. The lifetime of the clients is tied to > the dependency chain's outer-most module, which is the hardware's > DRM driver. Before client helpers could be unloaded, the driver module > would have to be unloaded, which also unregisters all clients. > > Driver modules that set up DRM clients can now be unloaded. > > Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx> > --- The change makes sense to me. Acked-by: Javier Martinez Canillas <javierm@xxxxxxxxxx> -- Best regards, Javier Martinez Canillas Core Platforms Red Hat
