[PATCH] drm/i915: gracefully bail out when init_clock_gating-pointer is not set

[Chris Wilson]

On Mon, 20 Jun 2011 18:10:30 +0200, Wolfram Sang <w.sang at pengutronix.de> wrote:
> Commit 6067aa (drm/i915: split clock gating init into per-chipset
> functions) introduces an init_clock_gating-pointer. There is one case,
> however, where it does not get set, so that caused an OOPS (Bug 37252).
> Change the code to return -ENODEV in this case and propagate it to the
> upper layers.

That's better, the system will continue to boot now and we will have an
appropriate error message.

> -		} else
> -			dev_priv->display.update_wm = NULL;
> +		} else {
> +			dev_err(dev->dev, "Unknown type!\n");
DRM_ERROR("Unknown chipset: %lx\n", dev->pci_device);
> +			return -ENODEV;
> +		}

DRM_ERROR to be in keeping with the rest of the code, and a bit of context
in case the error is ever pasted into bugzilla.kernel.org.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre