drm/amdgpu: cancel the correct hrtimer on exit

Signed-off-by: Flora Cui <flora.cui@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c

@@ -504,8 +504,8 @@ static int amdgpu_vkms_sw_fini(void *handle)
 	int i = 0;
 
 	for (i = 0; i < adev->mode_info.num_crtc; i++)
-		if (adev->mode_info.crtcs[i])
-			hrtimer_cancel(&adev->mode_info.crtcs[i]->vblank_timer);
+		if (adev->amdgpu_vkms_output[i].vblank_hrtimer.function)
+			hrtimer_cancel(&adev->amdgpu_vkms_output[i].vblank_hrtimer);
 
 	kfree(adev->mode_info.bios_hardcoded_edid);
 	kfree(adev->amdgpu_vkms_output);