From a62ad4e80722db187766c83a16fa84ec236cc5eb Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Thu, 7 Jun 2012 23:37:59 +0100
Subject: [PATCH] sna: Skip flushing the active queue if there is not a
 suitable bo pending

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 src/sna/kgem.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/sna/kgem.c b/src/sna/kgem.c
index 3078f49a..d2ca995c 100644
--- a/src/sna/kgem.c
+++ b/src/sna/kgem.c
@@ -2136,6 +2136,11 @@ search_linear_cache(struct kgem *kgem, unsigned int num_pages, unsigned flags)
 			return NULL;
 		}
 
+		if (list_is_empty(active(kgem, num_pages, I915_TILING_NONE))) {
+			DBG(("%s: active cache bucket empty\n", __FUNCTION__));
+			return NULL;
+		}
+
 		if (!__kgem_throttle_retire(kgem, 0)) {
 			DBG(("%s: nothing retired\n", __FUNCTION__));
 			return NULL;