diff options
| author | Michel Thierry <michel.thierry@intel.com> | 2015-06-25 12:59:38 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-08-03 09:29:09 -0700 |
| commit | 28362ad0c52531e85a296ba2c3623c220101c628 (patch) | |
| tree | 3a3d07b9ee8e2ccfd4bc38681dedf4a42521df63 | |
| parent | 598f69d4fb04f188a819bf649c0b35dd4225dc8d (diff) | |
drm/i915/ppgtt: Break loop in gen8_ppgtt_clear_range failure path
commit 00245266b4be4fbe989ee073663f56716da6c1f3 upstream.
If for some reason [1], the page directory/table does not exist, clear_range
would end up in an infinite while loop.
Introduced by commit 06fda602dbca ("drm/i915: Create page table allocators").
[1] This is already being addressed in one of Mika's patches:
http://mid.gmane.org/1432314314-23530-17-git-send-email-mika.kuoppala@intel.com
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reported-by: John Harrison <john.c.harrison@intel.com>
Signed-off-by: Michel Thierry <michel.thierry@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_gtt.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index 0239fbff7bf7..ad90fa3045e5 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -502,17 +502,17 @@ static void gen8_ppgtt_clear_range(struct i915_address_space *vm, struct page *page_table; if (WARN_ON(!ppgtt->pdp.page_directory[pdpe])) - continue; + break; pd = ppgtt->pdp.page_directory[pdpe]; if (WARN_ON(!pd->page_table[pde])) - continue; + break; pt = pd->page_table[pde]; if (WARN_ON(!pt->page)) - continue; + break; page_table = pt->page; |