From 6848fb235b1bac84e91d1efde4094540180c4d48 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Mon, 23 Jun 2014 11:27:20 +0100
Subject: [PATCH] sna: Fix flushing empty batches

A logic inversion in

commit 1909910fdf89216d18703e50728f4604f75d5d66
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Sun Jun 22 20:19:22 2014 +0100

    sna: Inject a batch flush before adding a fresh bo

also applied the injection to when the batch was empty.

Reported-by: Jiri Slaby <jirislaby@gmail.com>
References: https://bugs.freedesktop.org/show_bug.cgi?id=70461#c48
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 src/sna/kgem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/sna/kgem.c b/src/sna/kgem.c
index b54084ce..dfaf878e 100644
--- a/src/sna/kgem.c
+++ b/src/sna/kgem.c
@@ -5217,7 +5217,7 @@ inline static bool needs_reservation(struct kgem *kgem, struct kgem_bo *bo)
 
 inline static bool needs_batch_flush(struct kgem *kgem, struct kgem_bo *bo)
 {
-	if (kgem->nreloc)
+	if (kgem->nreloc == 0)
 		return false;
 
 	if (needs_semaphore(kgem, bo)) {