drm: Unconditionally do the range check in drm_mm_scan_add_block()

Doing the check is trivial (low cost in comparison to overall eviction)
and helps simplify the code.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161222083641.2691-29-chris@chris-wilson.co.uk
diff --git a/drivers/gpu/drm/i915/i915_gem_evict.c b/drivers/gpu/drm/i915/i915_gem_evict.c
index ac2f4ee..a6d5bab 100644
--- a/drivers/gpu/drm/i915/i915_gem_evict.c
+++ b/drivers/gpu/drm/i915/i915_gem_evict.c
@@ -126,13 +126,9 @@ i915_gem_evict_something(struct i915_address_space *vm,
 	 * On each list, the oldest objects lie at the HEAD with the freshest
 	 * object on the TAIL.
 	 */
-	if (start != 0 || end != vm->total) {
-		drm_mm_scan_init_with_range(&scan, &vm->mm, min_size,
-					    alignment, cache_level,
-					    start, end);
-	} else
-		drm_mm_scan_init(&scan, &vm->mm, min_size,
-				 alignment, cache_level);
+	drm_mm_scan_init_with_range(&scan, &vm->mm,
+				    min_size, alignment, cache_level,
+				    start, end);
 
 	if (flags & PIN_NONBLOCK)
 		phases[1] = NULL;