[PATCH 2/2] drm: fix a memleak on mutex failure path

[Oleg Drokin]

Hello!

On Apr 27, 2015, at 4:56 AM, Jani Nikula wrote:

> On Sun, 26 Apr 2015, green at linuxhacker.ru wrote:
>> From: Oleg Drokin <green at linuxhacker.ru>
>> 
>> Need to free just allocated ctx allocation if we cannot
>> get our config mutex.
>> 
>> This one has been flagged by kbuild bot all the way back in August,
>> but somehow nobody picked it up:
>> https://lists.01.org/pipermail/kbuild/2014-August/001691.html
>> 
>> Found with smatch.
>> 
>> Signed-off-by: Oleg Drokin <green at linuxhacker.ru>
>> CC: Daniel Vetter <daniel.vetter at ffwll.ch>
> 
> The function has another leaking failure path, would be nice to have
> that fixed too. Maybe with a common out label.

Hm, you are right, there's another path, though it's less obvious since
what is done with ctx inside of those other calls, but apparently nothing
if there is an error, so it's also a leak.

I'll do an updated patch in a moment.

Bye,
    Oleg