drm/msm/a6xx: avoid shadow NULL reference in failure path

If a6xx_hw_init() fails before creating the shadow_bo, the a6xx_pm_suspend
code referencing it will crash. Change the condition to one that avoids
this problem (note: creation of shadow_bo is behind this same condition)

Fixes: e8b0b99 ("drm/msm/a6xx: Clear shadow on suspend")
Signed-off-by: Jonathan Marek <[email protected]>
Reviewed-by: Akhil P Oommen <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Rob Clark <[email protected]>

Author: flto

drivers/gpu/drm/msm/adreno/a6xx_gpu.c

@@ -1284,7 +1284,7 @@ static int a6xx_pm_suspend(struct msm_gpu *gpu)
 	if (ret)
 		return ret;
 
-	if (adreno_gpu->base.hw_apriv || a6xx_gpu->has_whereami)
+	if (a6xx_gpu->shadow_bo)
 		for (i = 0; i < gpu->nr_rings; i++)
 			a6xx_gpu->shadow[i] = 0;