linux-kernel - [ 064/104] drm/radeon/benchmark: make sure bo blit copy exists before using it

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Message-Id: <20130325010530.597448227@decadent.org.uk>
Date:	Mon, 25 Mar 2013 01:06:28 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	akpm@...ux-foundation.org,
	Alex Deucher <alexander.deucher@....com>,
	Michel DÃ€nzer <michel.daenzer@....com>
Subject: [ 064/104] drm/radeon/benchmark: make sure bo blit copy exists before using it

3.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alex Deucher <alexander.deucher@....com>

commit fa8d387dc3f62062a6b4afbbb2a3438094fd8584 upstream.

Fixes a segfault on asics without a blit callback.

Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=62239

Reviewed-by: Michel Dänzer <michel.daenzer@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
[bwh: Backported to 3.2: s/copy\.blit/copy_blit/]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/gpu/drm/radeon/radeon_benchmark.c |   16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

--- a/drivers/gpu/drm/radeon/radeon_benchmark.c
+++ b/drivers/gpu/drm/radeon/radeon_benchmark.c
@@ -139,13 +139,15 @@ static void radeon_benchmark_move(struct
 						     sdomain, ddomain, "dma");
 	}
 
-	time = radeon_benchmark_do_move(rdev, size, saddr, daddr,
-					RADEON_BENCHMARK_COPY_BLIT, n);
-	if (time < 0)
-		goto out_cleanup;
-	if (time > 0)
-		radeon_benchmark_log_results(n, size, time,
-					     sdomain, ddomain, "blit");
+	if (rdev->asic->copy_blit) {
+		time = radeon_benchmark_do_move(rdev, size, saddr, daddr,
+						RADEON_BENCHMARK_COPY_BLIT, n);
+		if (time < 0)
+			goto out_cleanup;
+		if (time > 0)
+			radeon_benchmark_log_results(n, size, time,
+						     sdomain, ddomain, "blit");
+	}
 
 out_cleanup:
 	if (sobj) {


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