[PATCH] drm/msm: Error pointer dereference in error handling

[Dan Carpenter]

"gpu->aspace" can be either an error pointer or NULL so we need to check
for both.

Fixes: 0dbd7327f4d5 ("drm/msm: Move memptrs to msm_gpu")
Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>

diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c
index 66af5ac334ba..156ad7d5c68a 100644
--- a/drivers/gpu/drm/msm/msm_gpu.c
+++ b/drivers/gpu/drm/msm/msm_gpu.c
@@ -775,7 +775,7 @@ int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 		drm_gem_object_unreference_unlocked(gpu->memptrs_bo);
 	}
 
-	if (gpu->aspace) {
+	if (!IS_ERR_OR_NULL(gpu->aspace)) {
 		gpu->aspace->mmu->funcs->detach(gpu->aspace->mmu,
 			NULL, 0);
 		msm_gem_address_space_put(gpu->aspace);