drm/amdkfd: remove redundant iommu cleanup code

kfd_resume doesn't involve iommu operation, remove
redundant iommu cleanup code.

Signed-off-by: Yifan Zhang <[email protected]>
Reviewed-by: James Zhu <[email protected]>
Tested-by: James Zhu <[email protected]>
Acked-by: Felix Kuehling <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

Author: yifancom

drivers/gpu/drm/amd/amdkfd/kfd_device.c

@@ -1085,18 +1085,12 @@ static int kfd_resume(struct kfd_dev *kfd)
 	int err = 0;
 
 	err = kfd->dqm->ops.start(kfd->dqm);
-	if (err) {
+	if (err)
 		dev_err(kfd_device,
 			"Error starting queue manager for device %x:%x\n",
 			kfd->pdev->vendor, kfd->pdev->device);
-		goto dqm_start_error;
-	}
 
 	return err;
-
-dqm_start_error:
-	kfd_iommu_suspend(kfd);
-	return err;
 }
 
 static inline void kfd_queue_work(struct workqueue_struct *wq,