[PATCH] drm/i915: add check for valid init_clock_gating-pointer

[Jesse Barnes]

On Thu, 16 Jun 2011 00:24:39 +0200
Wolfram Sang <w.sang at pengutronix.de> wrote:

> Commit 6067aa (drm/i915: split clock gating init into per-chipset
> functions) unconditionally calls the newly created
> init_clock_gating-pointer. There is one case, however, where it does
> not get set:
> 
> if (HAS_PCH_SPLIT(dev)) {
> 	...
> 	} else
> 		dev_priv->display.update_wm = NULL;
> }

We'll only hit this path on non-existent hardware.  Since a clock
gating routine is required I'd rather just see the panic and add a new
routine at that time (i.e. what we normally do during bringup).

-- 
Jesse Barnes, Intel Open Source Technology Center