linux-kernel - Re: [PATCH v2] drm/i915: Fix lock dropping in intel_tv

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Date:	Mon, 1 Sep 2014 22:19:38 +0200
From:	"Tibor Billes" <tbilles@....com>
To:	ville.syrjala@...ux.intel.com
Cc:	intel-gfx@...ts.freedesktop.org, "David Airlie" <airlied@...ux.ie>,
	"Daniel Vetter" <daniel.vetter@...ll.ch>,
	"Jani Nikula" <jani.nikula@...ux.intel.com>,
	linux-kernel@...r.kernel.org,
	"Chris Wilson" <chris@...is-wilson.co.uk>
Subject: Re: [PATCH v2] drm/i915: Fix lock dropping in intel_tv_detect()

Hi!

From: ville.syrjala@...ux.intel.com Sent: Monday, September 01, 2014 at 12:07 PM

> When intel_tv_detect() fails to do load detection it would forget to
> drop the locks and clean up the acquire context. Fix it up.
> 
> This is a regression from:
> commit 208bf9fdcd3575aa4a5d48b3e0295f7cdaf6fc44
> Author: Ville Syrjälä <ville.syrjala@...ux.intel.com>
> Date: Mon Aug 11 13:15:35 2014 +0300
> 
> drm/i915: Fix locking for intel_enable_pipe_a()
> 
> v2: Make the code more readable (Chris)
> 
> Cc: Tibor Billes <tbilles@....com>
> Signed-off-by: Ville Syrjälä <ville.syrjala@...ux.intel.com>

I tested the posted patch, applying it on top of 3.17-rc2 did solve my boot problems. Just to make sure I also tried a clean 3.17-rc3, which was unable to boot. With this patch applied, it again booted successfully.

I'm not quite sure how tags work, but you may add my following tags:
Reported-by: Tibor Billes <tbilles@....com>
Tested-by: Tibor Billes <tbilles@....com>

Thank you all for the quick responses and the patch, nice work! :)

Tibor
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