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| author | Michel Thierry <michel.thierry@intel.com> | 2015-06-25 12:59:38 +0100 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2015-06-26 12:40:35 +0300 |
| commit | 00245266b4be4fbe989ee073663f56716da6c1f3 (patch) | |
| tree | 2a24caaae35ffc13a67d240b00d4007b37c8190b /drivers/gpu/drm/i915/i915_gem_gtt.c | |
| parent | ac88cd738425e04dbed3706621cf613a00708834 (diff) | |
| download | talos-op-linux-00245266b4be4fbe989ee073663f56716da6c1f3.tar.gz talos-op-linux-00245266b4be4fbe989ee073663f56716da6c1f3.zip | |
drm/i915/ppgtt: Break loop in gen8_ppgtt_clear_range failure path
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>
Cc: stable@vger.kernel.org
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>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_gtt.c')
| -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 619dad1b2386..9daa2883ac18 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -516,17 +516,17 @@ 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; |
