linux-kernel - Re: [git pull] fbcon locking fixes.

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Date:	Fri, 25 Jan 2013 11:45:59 +1000
From:	Dave Airlie <airlied@...il.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Dave Airlie <airlied@...ux.ie>,
	Andrew Morton <akpm@...ux-foundation.org>,
	DRI mailing list <dri-devel@...ts.freedesktop.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"linux-fbdev@...r.kernel.org" <linux-fbdev@...r.kernel.org>,
	m.b.lankhorst@...il.com
Subject: Re: [git pull] fbcon locking fixes.

On Fri, Jan 25, 2013 at 11:06 AM, Dave Airlie <airlied@...il.com> wrote:
> On Fri, Jan 25, 2013 at 10:53 AM, Linus Torvalds
> <torvalds@...ux-foundation.org> wrote:
>> On Thu, Jan 24, 2013 at 4:42 PM, Dave Airlie <airlied@...ux.ie> wrote:
>>>
>>> These patches have been sailing around long enough, waiting for a maintainer
>>> to reappear, so I've decided enough is enough, lockdep is kinda useful to have.
>>
>> Last this was tried, these patches failed miserably.
>>
>> They caused instant lockdep splat and then a total lockup with efifb.
>> It may be that Takashi's patch helps fix that problem, but it's in no
>> way clear that it does, so the patch series isn't at all obviously
>> stable.
>>
>> Yes, lockdep is indeed "kinda useful", and there clearly are locking
>> problems in fbdev. But I'm not seeing myself pulling these for 3.8.
>> They've been too problematic to pull in at this late stage.
>>
>
> Okay I'll fix the efifb problem and then maybe queue them for -next.

Okay I've just sent out another fbcon patch to fix the locking harder.

There was a path going into set_con2fb_path if an fb driver was
already registered, I just pushed the locking out further on anyone
going in there.

it boots on my EFI macbook here.

Dave.
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