[patch] drm/i915: unlock on error in i915_ppgtt_info()

[Geliang Tang]

On Fri, Oct 02, 2015 at 06:14:22PM +0300, Dan Carpenter wrote:
> We need to call intel_runtime_pm_put() and mutex_unlock() before
> returning.
> 
> Fixes: 7cb5dff8d59d ('drm/i915: fix task reference leak in i915_debugfs.c')
> Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>

Acked-by: Geliang Tang <geliangtang at 163.com>