[Intel-gfx] [PATCH v2] drm/i915: Fix lock dropping in intel_tv_detect()

[Chris Wilson]

On Mon, Sep 01, 2014 at 01:36:37PM +0300, Ville Syrjälä wrote:
> On Mon, Sep 01, 2014 at 11:20:09AM +0100, Chris Wilson wrote:
> > On Mon, Sep 01, 2014 at 01:07:40PM +0300, ville.syrjala at linux.intel.com wrote:
> > > From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > > 
> > > 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 at linux.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 at gmx.com>
> > > Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > 
> > Hmm, if we use WARN_ON() you should init type.
> 
> type is always set in the branch that sets status=connected.

Back to thinking about readability and making sure that the WARN_ON
never happens with just a glance. Otherwise, the WARN_ON would be better
as WARN_ON(unsigned)type >= last_tv_type); Or something. Anway, take
your pick and slap my r-b on it. :)
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre