This will help keep the next patch cleaner which will conditionally clear
the guard page, and use 0 num_entries when not actually clear space for
guard page.
Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
---
drivers/gpu/drm/i915/i915_gem_gtt.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 216e7a1..0fce8d0 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -516,6 +516,9 @@ static void gen6_ggtt_clear_range(struct drm_device *dev,
const int max_entries = gtt_total_entries(dev_priv->gtt) - first_entry;
int i;
+ if (num_entries == 0)
+ return;
+
if (WARN(num_entries > max_entries,
"First entry = %d; Num entries = %d (max=%d)\n",
first_entry, num_entries, max_entries))
@@ -546,6 +549,9 @@ static void i915_ggtt_clear_range(struct drm_device *dev,
unsigned int first_entry,
unsigned int num_entries)
{
+ if (num_entries == 0)
+ return;
+
intel_gtt_clear_range(first_entry, num_entries);
}
--
1.8.3.1
