[Intel-gfx] [PATCH 1/4] drm: Add a non-locking version of drm_kms_helper_poll_enable().

[Egbert Eich]

Lukas Wunner writes:
 > Hi Egbert,
 > 
 > On Wed, Sep 02, 2015 at 12:10:19AM +0200, Egbert Eich wrote:
 > > Lukas Wunner writes:
 > >  > On Tue, Sep 01, 2015 at 10:21:32PM +0200, Egbert Eich wrote:
 > >  > > drm_kms_helper_poll_enable() was converted to lock the mode_config
 > >  > > mutex in commit 8c4ccc4ab6f64e859d4ff8d7c02c2ed2e956e07f
 > >  > > ("drm/probe-helper: Grab mode_config.mutex in poll_init/enable").
 > >  > > 
 > >  > > This disregarded the cases where this function is called from a context
 > >  > > where this mutex is already locked.
 > >  > 
 > >  > Which ones would that be?
 > > 
 > > Have you missed the next patch in the series?
 > 
 > Sorry, I should have asked more precisely: Is this the only one?
 > If so it may make sense to modify i915_hotplug_work_func or
 > intel_hpd_irq_storm_disable instead.
 > 

The non-locking version existed before. I've just exported it so it cah
be used by drivers.
Moreover this is a helper function - why should it be restricted to 
callers which don't have the mode_config mutex grabbed?
I could be talked into changing the log message.

Egbert.