[PATCH] drm/radeon: resume fence driver to last sync sequence on lockup

[j.glisse at gmail.com]

From: Jerome Glisse <jglisse at redhat.com>

After lockup we need to resume fence to last sync sequence and not
last received sequence so that all thread waiting on command stream
that lockedup resume. Otherwise GPU reset will be ineffective in most
cases.

Signed-off-by: Jerome Glisse <jglisse at redhat.com>
---
 drivers/gpu/drm/radeon/radeon_fence.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/radeon/radeon_fence.c b/drivers/gpu/drm/radeon/radeon_fence.c
index 22bd6c2..38233e7 100644
--- a/drivers/gpu/drm/radeon/radeon_fence.c
+++ b/drivers/gpu/drm/radeon/radeon_fence.c
@@ -787,7 +787,7 @@ int radeon_fence_driver_start_ring(struct radeon_device *rdev, int ring)
 	}
 	rdev->fence_drv[ring].cpu_addr = &rdev->wb.wb[index/4];
 	rdev->fence_drv[ring].gpu_addr = rdev->wb.gpu_addr + index;
-	radeon_fence_write(rdev, atomic64_read(&rdev->fence_drv[ring].last_seq), ring);
+	radeon_fence_write(rdev, rdev->fence_drv[ring].sync_seq[ring], ring);
 	rdev->fence_drv[ring].initialized = true;
 	dev_info(rdev->dev, "fence driver on ring %d use gpu addr 0x%016llx and cpu addr 0x%p\n",
 		 ring, rdev->fence_drv[ring].gpu_addr, rdev->fence_drv[ring].cpu_addr);
-- 
1.7.11.7