linux-kernel - Re: [drm] e28cd4d0a2: INFO: trying to register non-static key.

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Date:	Fri, 17 Jun 2016 23:19:36 +0100
From:	Chris Wilson <chris@...is-wilson.co.uk>
To:	kernel test robot <xiaolong.ye@...el.com>
Cc:	lkp@...org, dri-devel@...ts.freedesktop.org,
	intel-gfx@...ts.freedesktop.org,
	LKML <linux-kernel@...r.kernel.org>,
	Daniel Vetter <daniel.vetter@...ll.ch>
Subject: Re: [drm]  e28cd4d0a2: INFO: trying to register non-static key.

On Sat, Jun 18, 2016 at 05:24:30AM +0800, kernel test robot wrote:
> 
> 
> FYI, we noticed the following commit:
> 
> git://anongit.freedesktop.org/drm-intel topic/drm-misc
> commit e28cd4d0a223e1bcea616326e2281900e7e7e9a2 ("drm: Automatically register/unregister all connectors")
> 
> 
> on test machine: vm-lkp-wsx03-yocto-i386: 1 threads qemu-system-i386 -enable-kvm with 320M memory
> 
> caused below changes:

So one driver skips drm_mode_config_init() and so
drm_connector_register_all() dies on the mutex_lock().

Maybe

	if (list_empty_safe(&dev->mode_config.connector_list))
		return;

or we could add a boolean to indicate an active mode_config?
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre