--- zzzz-none-000/linux-2.6.39.4/drivers/mtd/mtd_blkdevs.c	2011-08-03 19:43:28.000000000 +0000
+++ puma6-atom-6490-729/linux-2.6.39.4/drivers/mtd/mtd_blkdevs.c	2021-11-10 13:38:15.000000000 +0000
@@ -136,6 +136,9 @@
 	struct request *req = NULL;
 	int background_done = 0;
 
+#ifdef CONFIG_ARCH_GEN3	
+	down(&dev->thread_sem);
+#endif
 	spin_lock_irq(rq->queue_lock);
 
 	while (!kthread_should_stop()) {
@@ -162,7 +165,13 @@
 				set_current_state(TASK_RUNNING);
 
 			spin_unlock_irq(rq->queue_lock);
+#ifdef CONFIG_ARCH_GEN3	
+			up(&dev->thread_sem);
+#endif
 			schedule();
+#ifdef CONFIG_ARCH_GEN3	
+			down(&dev->thread_sem);
+#endif
 			spin_lock_irq(rq->queue_lock);
 			continue;
 		}
@@ -185,6 +194,9 @@
 		__blk_end_request_all(req, -EIO);
 
 	spin_unlock_irq(rq->queue_lock);
+#ifdef CONFIG_ARCH_GEN3	
+	up(&dev->thread_sem);
+#endif
 
 	return 0;
 }
@@ -417,6 +429,9 @@
 
 	/* Create processing thread */
 	/* TODO: workqueue ? */
+#ifdef CONFIG_ARCH_GEN3	
+	sema_init(&new->thread_sem, 1);
+#endif
 	new->thread = kthread_run(mtd_blktrans_thread, new,
 			"%s%d", tr->name, new->mtd->index);
 	if (IS_ERR(new->thread)) {