1 files changed, 27 insertions, 15 deletions

diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 26a51dc4278d..57fd66357b95 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -579,7 +579,8 @@ void dasd_kick_device(struct dasd_device *device)
 {
 	dasd_get_device(device);
 	/* queue call to dasd_kick_device to the kernel event daemon. */
-	schedule_work(&device->kick_work);
+	if (!schedule_work(&device->kick_work))
+		dasd_put_device(device);
 }
 EXPORT_SYMBOL(dasd_kick_device);
 
@@ -599,7 +600,8 @@ void dasd_reload_device(struct dasd_device *device)
 {
 	dasd_get_device(device);
 	/* queue call to dasd_reload_device to the kernel event daemon. */
-	schedule_work(&device->reload_device);
+	if (!schedule_work(&device->reload_device))
+		dasd_put_device(device);
 }
 EXPORT_SYMBOL(dasd_reload_device);
 
@@ -619,7 +621,8 @@ void dasd_restore_device(struct dasd_device *device)
 {
 	dasd_get_device(device);
 	/* queue call to dasd_restore_device to the kernel event daemon. */
-	schedule_work(&device->restore_device);
+	if (!schedule_work(&device->restore_device))
+		dasd_put_device(device);
 }
 
 /*
@@ -2163,18 +2166,22 @@ static int _dasd_sleep_on(struct dasd_ccw_req *maincqr, int interruptible)
 			cqr->intrc = -ENOLINK;
 			continue;
 		}
-		/* Don't try to start requests if device is stopped */
-		if (interruptible) {
-			rc = wait_event_interruptible(
-				generic_waitq, !(device->stopped));
-			if (rc == -ERESTARTSYS) {
-				cqr->status = DASD_CQR_FAILED;
-				maincqr->intrc = rc;
-				continue;
-			}
-		} else
-			wait_event(generic_waitq, !(device->stopped));
-
+		/*
+		 * Don't try to start requests if device is stopped
+		 * except path verification requests
+		 */
+		if (!test_bit(DASD_CQR_VERIFY_PATH, &cqr->flags)) {
+			if (interruptible) {
+				rc = wait_event_interruptible(
+					generic_waitq, !(device->stopped));
+				if (rc == -ERESTARTSYS) {
+					cqr->status = DASD_CQR_FAILED;
+					maincqr->intrc = rc;
+					continue;
+				}
+			} else
+				wait_event(generic_waitq, !(device->stopped));
+		}
 		if (!cqr->callback)
 			cqr->callback = dasd_wakeup_cb;
 
@@ -2524,6 +2531,11 @@ static void __dasd_process_request_queue(struct dasd_block *block)
 			__blk_end_request_all(req, -EIO);
 		return;
 	}
+
+	/* if device ist stopped do not fetch new requests */
+	if (basedev->stopped)
+		return;
+
 	/* Now we try to fetch requests from the request queue */
 	while ((req = blk_peek_request(queue))) {
 		if (basedev->features & DASD_FEATURE_READONLY &&