On Thu, Oct 19, 2017 at 12:50:16PM -0500, Mario Limonciello wrote: > + wblock = container_of(wdev, struct wmi_block, dev); > + if (!wblock) > + return -ENODEV; How can container_of() ever return NULL? If so, you have a very odd memory layout... > + list_for_each_entry_safe(wblock, next, &wmi_block_list, list) { > + wdriver = container_of(wblock->dev.dev.driver, > + struct wmi_driver, driver); > + if (!wdriver) > + continue; Same here. And other places in this file. thanks, greg k-h