[PATCH v2] drm: Do not call drm_dev_unregister twice on drm_unplug_dev

[Michel Dänzer]

On 30/05/17 05:13 AM, Chris Wilson wrote:
> On Mon, May 29, 2017 at 09:04:07PM +0200, Daniel Vetter wrote:
>> On Mon, May 29, 2017 at 09:02:38PM +0200, Daniel Vetter wrote:
>>> On Sun, May 28, 2017 at 07:16:55PM +0200, Hans de Goede wrote:
>>>> Since commit a39be606f99d ("drm: Do a full device unregister when
>>>> unplugging") drm_unplug_dev has been calling drm_dev_unregister followed
>>>> by a drm_put_dev when open_count reaches 0. This drm_put_dev calls
>>>> drm_dev_unregister again. Since drm_dev_unregister is not protected
>>>> against being called multiple times this leads to havoc.
>>>>
>>>> This commit fixes this by calling drm_dev_unref instead of drm_put_dev.
>>>>
>>>> Fixes: a39be606f99d ("drm: Do a full device unregister when unplugging")
>>>> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> 
>> One more: When fixing a regression pls cc author/reviewer of the offending
>> patch, for the learning. Adding Chris.
> 
> I was CC'ed, the ml stripping headers again?

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-- 
Earthling Michel Dänzer               |               http://www.amd.com
Libre software enthusiast             |             Mesa and X developer