drm/radeon: fix the crash in benchmark functions

radeon_copy_dma and radeon_copy_blit must be called with
a valid reservation object. Otherwise a crash will be provoked.
We borrow the object from destination BO.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=88464

Cc: stable@vger.kernel.org
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Ilija Hadzic <ihadzic@research.bell-labs.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/radeon/radeon_benchmark.c b/drivers/gpu/drm/radeon/radeon_benchmark.c
index 9e7f23d..87d5fb2 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_benchmark.c
+++ b/drivers/gpu/drm/radeon/radeon_benchmark.c
@@ -34,7 +34,8 @@
 
 static int radeon_benchmark_do_move(struct radeon_device *rdev, unsigned size,
                                    uint64_t saddr, uint64_t daddr,
-                                   int flag, int n)
+                                   int flag, int n,
+                                   struct reservation_object *resv)
 {
        unsigned long start_jiffies;
        unsigned long end_jiffies;
@@ -47,12 +48,12 @@ static int radeon_benchmark_do_move(struct radeon_device *rdev, unsigned size,
                case RADEON_BENCHMARK_COPY_DMA:
                        fence = radeon_copy_dma(rdev, saddr, daddr,
                                                size / RADEON_GPU_PAGE_SIZE,
-                                               NULL);
+                                               resv);
                        break;
                case RADEON_BENCHMARK_COPY_BLIT:
                        fence = radeon_copy_blit(rdev, saddr, daddr,
                                                 size / RADEON_GPU_PAGE_SIZE,
-                                                NULL);
+                                                resv);
                        break;
                default:
                        DRM_ERROR("Unknown copy method\n");
@@ -120,7 +121,8 @@ static void radeon_benchmark_move(struct radeon_device *rdev, unsigned size,
 
        if (rdev->asic->copy.dma) {
                time = radeon_benchmark_do_move(rdev, size, saddr, daddr,
-                                               RADEON_BENCHMARK_COPY_DMA, n);
+                                               RADEON_BENCHMARK_COPY_DMA, n,
+                                               dobj->tbo.resv);
                if (time < 0)
                        goto out_cleanup;
                if (time > 0)
@@ -130,7 +132,8 @@ static void radeon_benchmark_move(struct radeon_device *rdev, unsigned size,
 
        if (rdev->asic->copy.blit) {
                time = radeon_benchmark_do_move(rdev, size, saddr, daddr,
-                                               RADEON_BENCHMARK_COPY_BLIT, n);
+                                               RADEON_BENCHMARK_COPY_BLIT, n,
+                                               dobj->tbo.resv);
                if (time < 0)
                        goto out_cleanup;
                if (time > 0)