[ 077/122] drm/radeon: fix fence related segfault in CS

[Greg Kroah-Hartman]

From: Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>

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

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

From: Christian KÃnig <deathsimple@xxxxxxxxxxx>

commit 93bf888c5c730605e3470f5d2381f296eda88d79 upstream.

Don't return success if scheduling the IB fails, otherwise
we end up with an oops in ttm_eu_fence_buffer_objects.

Signed-off-by: Christian KÃnig <deathsimple@xxxxxxxxxxx>
Reviewed-by: Jerome Glisse <jglisse@xxxxxxxxxx>
Reviewed-by: Michel DÃnzer <michel.daenzer@xxxxxxx>
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/gpu/drm/radeon/radeon_cs.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/radeon/radeon_cs.c
+++ b/drivers/gpu/drm/radeon/radeon_cs.c
@@ -377,7 +377,7 @@ static int radeon_cs_ib_chunk(struct rad
 	if (r) {
 		DRM_ERROR("Failed to schedule IB !\n");
 	}
-	return 0;
+	return r;
 }
 
 static int radeon_bo_vm_update_pte(struct radeon_cs_parser *parser,


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