drm/amdgpu: fix dereference before check

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: Monk Liu <monk.liu@amd.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
index 66c66f83b407..74ed94ee7102 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
@@ -138,9 +138,9 @@ void amdgpu_ib_free(struct amdgpu_device *adev, struct amdgpu_ib *ib)
 int amdgpu_ib_schedule(struct amdgpu_device *adev, unsigned num_ibs,
                        struct amdgpu_ib *ibs, void *owner)
 {
-        struct amdgpu_ring *ring;
-        struct amdgpu_vm *vm = ibs->vm;
         struct amdgpu_ib *ib = &ibs[0];
+        struct amdgpu_ring *ring;
+        struct amdgpu_vm *vm;
         unsigned i;
         int r = 0;
 
@@ -148,6 +148,8 @@ int amdgpu_ib_schedule(struct amdgpu_device *adev, unsigned num_ibs,
                 return -EINVAL;
 
         ring = ibs->ring;
+        vm = ibs->vm;
+
         if (!ring->ready) {
                 dev_err(adev->dev, "couldn't schedule ib\n");
                 return -EINVAL;