drm/i915/bdw: Free PPGTT struct

GEN8 never freed the PPGTT struct. As GEN8 doesn't use full PPGTT, the
leak is small and only found on a module reload. ie. I don't think this
needs to go to stable.

v2: The very naive, kfree in gen8 ppgtt cleanup, is subject to a double
free on PPGTT initialization failure. (Spotted by Imre). Instead this
patch pulls the ppgtt struct freeing out of the cleanup and leaves it to
the allocators/callers or the one doing the last kref_put as in standard
convention

Reported-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 0 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 69a88d41a2a7..49e79fbee45d 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -859,7 +859,6 @@ static void gen6_ppgtt_cleanup(struct i915_address_space *vm)
         for (i = 0; i < ppgtt->num_pd_entries; i++)
                 __free_page(ppgtt->pt_pages[i]);
         kfree(ppgtt->pt_pages);
-        kfree(ppgtt);
 }
 
 static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt)