drm/amdkfd: Minor cleanups

These were missed previously when rebasing changes for upstreaming.

v2: Remove redundant sched_policy conditions

Signed-off-by: Felix Kuehling <[e-mail]>
Reviewed-by: Oded Gabbay <[e-mail]>
Signed-off-by: Oded Gabbay <[e-mail]>

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

···
 	if (sched_policy != KFD_SCHED_POLICY_NO_HWS) {
 		retval = unmap_queues_cpsch(dqm,
 				KFD_UNMAP_QUEUES_FILTER_DYNAMIC_QUEUES, 0);
-		if (retval != 0) {
+		if (retval) {
 			pr_err("unmap queue failed\n");
 			goto out_unlock;
 		}
-	} else if (sched_policy == KFD_SCHED_POLICY_NO_HWS &&
-		   prev_active &&
+	} else if (prev_active &&
 		   (q->properties.type == KFD_QUEUE_TYPE_COMPUTE ||
 		    q->properties.type == KFD_QUEUE_TYPE_SDMA)) {
 		retval = mqd->destroy_mqd(mqd, q->mqd,
···
 
 	if (sched_policy != KFD_SCHED_POLICY_NO_HWS)
 		retval = map_queues_cpsch(dqm);
-	else if (sched_policy == KFD_SCHED_POLICY_NO_HWS &&
-		 q->properties.is_active &&
+	else if (q->properties.is_active &&
 		 (q->properties.type == KFD_QUEUE_TYPE_COMPUTE ||
 		  q->properties.type == KFD_QUEUE_TYPE_SDMA))
 		retval = mqd->load_mqd(mqd, q->mqd, q->pipe, q->queue,
···
 
 	if (q->properties.type == KFD_QUEUE_TYPE_SDMA) {
 		retval = allocate_sdma_queue(dqm, &q->sdma_id);
-		if (retval != 0)
+		if (retval)
 			goto out;
 		q->properties.sdma_queue_id =
 			q->sdma_id / CIK_SDMA_QUEUES_PER_ENGINE;

drivers/gpu/drm/amd/amdkfd/kfd_priv.h

···
 	 * In any process, the thread that started main() is the lead
 	 * thread and outlives the rest.
 	 * It is here because amd_iommu_bind_pasid wants a task_struct.
+	 * It can also be used for safely getting a reference to the
+	 * mm_struct of the process.
 	 */
 	struct task_struct *lead_thread;
 

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

···
 		err = amd_iommu_bind_pasid(dev->pdev, p->pasid,
 				p->lead_thread);
 		if (err < 0) {
-			pr_err("unexpected pasid %d binding failure\n",
+			pr_err("Unexpected pasid %d binding failure\n",
 					p->pasid);
 			mutex_unlock(&p->mutex);
 			break;