Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6

* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: (72 commits)
  [S390] 3215/3270 console: remove wrong comment
  [S390] dasd: remove BKL from extended error reporting code
  [S390] vmlogrdr: remove BKL
  [S390] vmur: remove BKL
  [S390] zcrypt: remove BKL
  [S390] 3270: remove BKL
  [S390] vmwatchdog: remove lock_kernel() from open() function
  [S390] monwriter: remove lock_kernel() from open() function
  [S390] monreader: remove lock_kernel() from open() function
  [S390] s390: remove unused nfsd #includes
  [S390] ftrace: build ftrace.o when CONFIG_FTRACE_SYSCALLS is set for s390
  [S390] etr/stp: put correct per cpu variable
  [S390] tty3270: move keyboard compat ioctls
  [S390] sclp: improve servicability setting
  [S390] s390: use change recording override for kernel mapping
  [S390] MAINTAINERS: Add s390 drivers block
  [S390] use generic sockios.h header file
  [S390] use generic termbits.h header file
  [S390] smp: remove unused typedef and defines
  [S390] cmm: free pages on hibernate.
  ...

48 files changed, 2353 insertions, 2055 deletions

diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index aaccc8ecfa8..fdb2e7c1450 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -24,7 +24,6 @@
 #include <asm/ccwdev.h>
 #include <asm/ebcdic.h>
 #include <asm/idals.h>
-#include <asm/todclk.h>
 #include <asm/itcw.h>
 
 /* This is ugly... */
@@ -64,6 +63,7 @@ static void do_restore_device(struct work_struct *);
 static void dasd_return_cqr_cb(struct dasd_ccw_req *, void *);
 static void dasd_device_timeout(unsigned long);
 static void dasd_block_timeout(unsigned long);
+static void __dasd_process_erp(struct dasd_device *, struct dasd_ccw_req *);
 
 /*
  * SECTION: Operations on the device structure.
@@ -960,7 +960,7 @@ static void dasd_device_timeout(unsigned long ptr)
 	device = (struct dasd_device *) ptr;
 	spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
 	/* re-activate request queue */
-        device->stopped &= ~DASD_STOPPED_PENDING;
+	dasd_device_remove_stop_bits(device, DASD_STOPPED_PENDING);
 	spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
 	dasd_schedule_device_bh(device);
 }
@@ -994,10 +994,9 @@ static void dasd_handle_killed_request(struct ccw_device *cdev,
 		return;
 	cqr = (struct dasd_ccw_req *) intparm;
 	if (cqr->status != DASD_CQR_IN_IO) {
-		DBF_EVENT(DBF_DEBUG,
-			"invalid status in handle_killed_request: "
-			"bus_id %s, status %02x",
-			dev_name(&cdev->dev), cqr->status);
+		DBF_EVENT_DEVID(DBF_DEBUG, cdev,
+				"invalid status in handle_killed_request: "
+				"%02x", cqr->status);
 		return;
 	}
 
@@ -1023,7 +1022,7 @@ void dasd_generic_handle_state_change(struct dasd_device *device)
 	/* First of all start sense subsystem status request. */
 	dasd_eer_snss(device);
 
-	device->stopped &= ~DASD_STOPPED_PENDING;
+	dasd_device_remove_stop_bits(device, DASD_STOPPED_PENDING);
 	dasd_schedule_device_bh(device);
 	if (device->block)
 		dasd_schedule_block_bh(device->block);
@@ -1045,12 +1044,13 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
 		case -EIO:
 			break;
 		case -ETIMEDOUT:
-			DBF_EVENT(DBF_WARNING, "%s(%s): request timed out\n",
-			       __func__, dev_name(&cdev->dev));
+			DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s: "
+					"request timed out\n", __func__);
 			break;
 		default:
-			DBF_EVENT(DBF_WARNING, "%s(%s): unknown error %ld\n",
-			       __func__, dev_name(&cdev->dev), PTR_ERR(irb));
+			DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s: "
+					"unknown error %ld\n", __func__,
+					PTR_ERR(irb));
 		}
 		dasd_handle_killed_request(cdev, intparm);
 		return;
@@ -1405,6 +1405,20 @@ void dasd_schedule_device_bh(struct dasd_device *device)
 	tasklet_hi_schedule(&device->tasklet);
 }
 
+void dasd_device_set_stop_bits(struct dasd_device *device, int bits)
+{
+	device->stopped |= bits;
+}
+EXPORT_SYMBOL_GPL(dasd_device_set_stop_bits);
+
+void dasd_device_remove_stop_bits(struct dasd_device *device, int bits)
+{
+	device->stopped &= ~bits;
+	if (!device->stopped)
+		wake_up(&generic_waitq);
+}
+EXPORT_SYMBOL_GPL(dasd_device_remove_stop_bits);
+
 /*
  * Queue a request to the head of the device ccw_queue.
  * Start the I/O if possible.
@@ -1465,58 +1479,135 @@ static inline int _wait_for_wakeup(struct dasd_ccw_req *cqr)
 }
 
 /*
- * Queue a request to the tail of the device ccw_queue and wait for
- * it's completion.
+ * checks if error recovery is necessary, returns 1 if yes, 0 otherwise.
  */
-int dasd_sleep_on(struct dasd_ccw_req *cqr)
+static int __dasd_sleep_on_erp(struct dasd_ccw_req *cqr)
 {
 	struct dasd_device *device;
-	int rc;
+	dasd_erp_fn_t erp_fn;
 
+	if (cqr->status == DASD_CQR_FILLED)
+		return 0;
 	device = cqr->startdev;
+	if (test_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags)) {
+		if (cqr->status == DASD_CQR_TERMINATED) {
+			device->discipline->handle_terminated_request(cqr);
+			return 1;
+		}
+		if (cqr->status == DASD_CQR_NEED_ERP) {
+			erp_fn = device->discipline->erp_action(cqr);
+			erp_fn(cqr);
+			return 1;
+		}
+		if (cqr->status == DASD_CQR_FAILED)
+			dasd_log_sense(cqr, &cqr->irb);
+		if (cqr->refers) {
+			__dasd_process_erp(device, cqr);
+			return 1;
+		}
+	}
+	return 0;
+}
 
-	cqr->callback = dasd_wakeup_cb;
-	cqr->callback_data = (void *) &generic_waitq;
-	dasd_add_request_tail(cqr);
-	wait_event(generic_waitq, _wait_for_wakeup(cqr));
+static int __dasd_sleep_on_loop_condition(struct dasd_ccw_req *cqr)
+{
+	if (test_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags)) {
+		if (cqr->refers) /* erp is not done yet */
+			return 1;
+		return ((cqr->status != DASD_CQR_DONE) &&
+			(cqr->status != DASD_CQR_FAILED));
+	} else
+		return (cqr->status == DASD_CQR_FILLED);
+}
 
-	if (cqr->status == DASD_CQR_DONE)
+static int _dasd_sleep_on(struct dasd_ccw_req *maincqr, int interruptible)
+{
+	struct dasd_device *device;
+	int rc;
+	struct list_head ccw_queue;
+	struct dasd_ccw_req *cqr;
+
+	INIT_LIST_HEAD(&ccw_queue);
+	maincqr->status = DASD_CQR_FILLED;
+	device = maincqr->startdev;
+	list_add(&maincqr->blocklist, &ccw_queue);
+	for (cqr = maincqr;  __dasd_sleep_on_loop_condition(cqr);
+	     cqr = list_first_entry(&ccw_queue,
+				    struct dasd_ccw_req, blocklist)) {
+
+		if (__dasd_sleep_on_erp(cqr))
+			continue;
+		if (cqr->status != DASD_CQR_FILLED) /* could be failed */
+			continue;
+
+		/* Non-temporary stop condition will trigger fail fast */
+		if (device->stopped & ~DASD_STOPPED_PENDING &&
+		    test_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags) &&
+		    (!dasd_eer_enabled(device))) {
+			cqr->status = DASD_CQR_FAILED;
+			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));
+
+		cqr->callback = dasd_wakeup_cb;
+		cqr->callback_data = (void *) &generic_waitq;
+		dasd_add_request_tail(cqr);
+		if (interruptible) {
+			rc = wait_event_interruptible(
+				generic_waitq, _wait_for_wakeup(cqr));
+			if (rc == -ERESTARTSYS) {
+				dasd_cancel_req(cqr);
+				/* wait (non-interruptible) for final status */
+				wait_event(generic_waitq,
+					   _wait_for_wakeup(cqr));
+				cqr->status = DASD_CQR_FAILED;
+				maincqr->intrc = rc;
+				continue;
+			}
+		} else
+			wait_event(generic_waitq, _wait_for_wakeup(cqr));
+	}
+
+	maincqr->endclk = get_clock();
+	if ((maincqr->status != DASD_CQR_DONE) &&
+	    (maincqr->intrc != -ERESTARTSYS))
+		dasd_log_sense(maincqr, &maincqr->irb);
+	if (maincqr->status == DASD_CQR_DONE)
 		rc = 0;
-	else if (cqr->intrc)
-		rc = cqr->intrc;
+	else if (maincqr->intrc)
+		rc = maincqr->intrc;
 	else
 		rc = -EIO;
 	return rc;
 }
 
 /*
+ * Queue a request to the tail of the device ccw_queue and wait for
+ * it's completion.
+ */
+int dasd_sleep_on(struct dasd_ccw_req *cqr)
+{
+	return _dasd_sleep_on(cqr, 0);
+}
+
+/*
  * Queue a request to the tail of the device ccw_queue and wait
  * interruptible for it's completion.
  */
 int dasd_sleep_on_interruptible(struct dasd_ccw_req *cqr)
 {
-	struct dasd_device *device;
-	int rc;
-
-	device = cqr->startdev;
-	cqr->callback = dasd_wakeup_cb;
-	cqr->callback_data = (void *) &generic_waitq;
-	dasd_add_request_tail(cqr);
-	rc = wait_event_interruptible(generic_waitq, _wait_for_wakeup(cqr));
-	if (rc == -ERESTARTSYS) {
-		dasd_cancel_req(cqr);
-		/* wait (non-interruptible) for final status */
-		wait_event(generic_waitq, _wait_for_wakeup(cqr));
-		cqr->intrc = rc;
-	}
-
-	if (cqr->status == DASD_CQR_DONE)
-		rc = 0;
-	else if (cqr->intrc)
-		rc = cqr->intrc;
-	else
-		rc = -EIO;
-	return rc;
+	return _dasd_sleep_on(cqr, 1);
 }
 
 /*
@@ -1630,7 +1721,7 @@ static void dasd_block_timeout(unsigned long ptr)
 	block = (struct dasd_block *) ptr;
 	spin_lock_irqsave(get_ccwdev_lock(block->base->cdev), flags);
 	/* re-activate request queue */
-	block->base->stopped &= ~DASD_STOPPED_PENDING;
+	dasd_device_remove_stop_bits(block->base, DASD_STOPPED_PENDING);
 	spin_unlock_irqrestore(get_ccwdev_lock(block->base->cdev), flags);
 	dasd_schedule_block_bh(block);
 }
@@ -1657,11 +1748,10 @@ void dasd_block_clear_timer(struct dasd_block *block)
 /*
  * Process finished error recovery ccw.
  */
-static inline void __dasd_block_process_erp(struct dasd_block *block,
-					    struct dasd_ccw_req *cqr)
+static void __dasd_process_erp(struct dasd_device *device,
+			       struct dasd_ccw_req *cqr)
 {
 	dasd_erp_fn_t erp_fn;
-	struct dasd_device *device = block->base;
 
 	if (cqr->status == DASD_CQR_DONE)
 		DBF_DEV_EVENT(DBF_NOTICE, device, "%s", "ERP successful");
@@ -1725,9 +1815,12 @@ static void __dasd_process_request_queue(struct dasd_block *block)
 				 */
 				if (!list_empty(&block->ccw_queue))
 					break;
-				spin_lock_irqsave(get_ccwdev_lock(basedev->cdev), flags);
-				basedev->stopped |= DASD_STOPPED_PENDING;
-				spin_unlock_irqrestore(get_ccwdev_lock(basedev->cdev), flags);
+				spin_lock_irqsave(
+					get_ccwdev_lock(basedev->cdev), flags);
+				dasd_device_set_stop_bits(basedev,
+							  DASD_STOPPED_PENDING);
+				spin_unlock_irqrestore(
+					get_ccwdev_lock(basedev->cdev), flags);
 				dasd_block_set_timer(block, HZ/2);
 				break;
 			}
@@ -1813,7 +1906,7 @@ restart:
 			cqr->status = DASD_CQR_FILLED;
 			cqr->retries = 255;
 			spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags);
-			base->stopped |= DASD_STOPPED_QUIESCE;
+			dasd_device_set_stop_bits(base, DASD_STOPPED_QUIESCE);
 			spin_unlock_irqrestore(get_ccwdev_lock(base->cdev),
 					       flags);
 			goto restart;
@@ -1821,7 +1914,7 @@ restart:
 
 		/* Process finished ERP request. */
 		if (cqr->refers) {
-			__dasd_block_process_erp(block, cqr);
+			__dasd_process_erp(base, cqr);
 			goto restart;
 		}
 
@@ -1952,7 +2045,7 @@ restart_cb:
 		/* Process finished ERP request. */
 		if (cqr->refers) {
 			spin_lock_bh(&block->queue_lock);
-			__dasd_block_process_erp(block, cqr);
+			__dasd_process_erp(block->base, cqr);
 			spin_unlock_bh(&block->queue_lock);
 			/* restart list_for_xx loop since dasd_process_erp
 			 * might remove multiple elements */
@@ -2208,18 +2301,11 @@ int dasd_generic_probe(struct ccw_device *cdev,
 {
 	int ret;
 
-	ret = ccw_device_set_options(cdev, CCWDEV_DO_PATHGROUP);
-	if (ret) {
-		DBF_EVENT(DBF_WARNING,
-		       "dasd_generic_probe: could not set ccw-device options "
-		       "for %s\n", dev_name(&cdev->dev));
-		return ret;
-	}
 	ret = dasd_add_sysfs_files(cdev);
 	if (ret) {
-		DBF_EVENT(DBF_WARNING,
-		       "dasd_generic_probe: could not add sysfs entries "
-		       "for %s\n", dev_name(&cdev->dev));
+		DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s",
+				"dasd_generic_probe: could not add "
+				"sysfs entries");
 		return ret;
 	}
 	cdev->handler = &dasd_int_handler;
@@ -2418,16 +2504,16 @@ int dasd_generic_notify(struct ccw_device *cdev, int event)
 				cqr->status = DASD_CQR_QUEUED;
 				cqr->retries++;
 			}
-		device->stopped |= DASD_STOPPED_DC_WAIT;
+		dasd_device_set_stop_bits(device, DASD_STOPPED_DC_WAIT);
 		dasd_device_clear_timer(device);
 		dasd_schedule_device_bh(device);
 		ret = 1;
 		break;
 	case CIO_OPER:
 		/* FIXME: add a sanity check. */
-		device->stopped &= ~DASD_STOPPED_DC_WAIT;
+		dasd_device_remove_stop_bits(device, DASD_STOPPED_DC_WAIT);
 		if (device->stopped & DASD_UNRESUMED_PM) {
-			device->stopped &= ~DASD_UNRESUMED_PM;
+			dasd_device_remove_stop_bits(device, DASD_UNRESUMED_PM);
 			dasd_restore_device(device);
 			ret = 1;
 			break;
@@ -2452,7 +2538,7 @@ int dasd_generic_pm_freeze(struct ccw_device *cdev)
 	if (IS_ERR(device))
 		return PTR_ERR(device);
 	/* disallow new I/O  */
-	device->stopped |= DASD_STOPPED_PM;
+	dasd_device_set_stop_bits(device, DASD_STOPPED_PM);
 	/* clear active requests */
 	INIT_LIST_HEAD(&freeze_queue);
 	spin_lock_irq(get_ccwdev_lock(cdev));
@@ -2504,14 +2590,18 @@ int dasd_generic_restore_device(struct ccw_device *cdev)
 		return PTR_ERR(device);
 
 	/* allow new IO again */
-	device->stopped &= ~DASD_STOPPED_PM;
-	device->stopped &= ~DASD_UNRESUMED_PM;
+	dasd_device_remove_stop_bits(device,
+				     (DASD_STOPPED_PM | DASD_UNRESUMED_PM));
 
 	dasd_schedule_device_bh(device);
 
-	if (device->discipline->restore)
+	/*
+	 * call discipline restore function
+	 * if device is stopped do nothing e.g. for disconnected devices
+	 */
+	if (device->discipline->restore && !(device->stopped))
 		rc = device->discipline->restore(device);
-	if (rc)
+	if (rc || device->stopped)
 		/*
 		 * if the resume failed for the DASD we put it in
 		 * an UNRESUMED stop state
@@ -2561,8 +2651,7 @@ static struct dasd_ccw_req *dasd_generic_build_rdc(struct dasd_device *device,
 	cqr->startdev = device;
 	cqr->memdev = device;
 	cqr->expires = 10*HZ;
-	clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
-	cqr->retries = 2;
+	cqr->retries = 256;
 	cqr->buildclk = get_clock();
 	cqr->status = DASD_CQR_FILLED;
 	return cqr;
diff --git a/drivers/s390/block/dasd_3990_erp.c b/drivers/s390/block/dasd_3990_erp.c
index e8ff7b0c961..44796ba4eb9 100644
--- a/drivers/s390/block/dasd_3990_erp.c
+++ b/drivers/s390/block/dasd_3990_erp.c
@@ -12,7 +12,6 @@
 #include <linux/timer.h>
 #include <linux/slab.h>
 #include <asm/idals.h>
-#include <asm/todclk.h>
 
 #define PRINTK_HEADER "dasd_erp(3990): "
 
@@ -70,8 +69,7 @@ dasd_3990_erp_cleanup(struct dasd_ccw_req * erp, char final_status)
  *   processing until the started timer has expired or an related
  *   interrupt was received.
  */
-static void
-dasd_3990_erp_block_queue(struct dasd_ccw_req * erp, int expires)
+static void dasd_3990_erp_block_queue(struct dasd_ccw_req *erp, int expires)
 {
 
 	struct dasd_device *device = erp->startdev;
@@ -81,10 +79,13 @@ dasd_3990_erp_block_queue(struct dasd_ccw_req * erp, int expires)
 		    "blocking request queue for %is", expires/HZ);
 
 	spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
-	device->stopped |= DASD_STOPPED_PENDING;
+	dasd_device_set_stop_bits(device, DASD_STOPPED_PENDING);
 	spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
 	erp->status = DASD_CQR_FILLED;
-	dasd_block_set_timer(device->block, expires);
+	if (erp->block)
+		dasd_block_set_timer(erp->block, expires);
+	else
+		dasd_device_set_timer(device, expires);
 }
 
 /*
@@ -243,9 +244,13 @@ dasd_3990_erp_DCTL(struct dasd_ccw_req * erp, char modifier)
  * DESCRIPTION
  *   Setup ERP to do the ERP action 1 (see Reference manual).
  *   Repeat the operation on a different channel path.
- *   If all alternate paths have been tried, the request is posted with a
- *   permanent error.
- *   Note: duplex handling is not implemented (yet).
+ *   As deviation from the recommended recovery action, we reset the path mask
+ *   after we have tried each path and go through all paths a second time.
+ *   This will cover situations where only one path at a time is actually down,
+ *   but all paths fail and recover just with the same sequence and timing as
+ *   we try to use them (flapping links).
+ *   If all alternate paths have been tried twice, the request is posted with
+ *   a permanent error.
  *
  *  PARAMETER
  *   erp		pointer to the current ERP
@@ -254,17 +259,25 @@ dasd_3990_erp_DCTL(struct dasd_ccw_req * erp, char modifier)
  *   erp		pointer to the ERP
  *
  */
-static struct dasd_ccw_req *
-dasd_3990_erp_action_1(struct dasd_ccw_req * erp)
+static struct dasd_ccw_req *dasd_3990_erp_action_1_sec(struct dasd_ccw_req *erp)
 {
+	erp->function = dasd_3990_erp_action_1_sec;
+	dasd_3990_erp_alternate_path(erp);
+	return erp;
+}
 
+static struct dasd_ccw_req *dasd_3990_erp_action_1(struct dasd_ccw_req *erp)
+{
 	erp->function = dasd_3990_erp_action_1;
-
 	dasd_3990_erp_alternate_path(erp);
-
+	if (erp->status == DASD_CQR_FAILED) {
+		erp->status = DASD_CQR_FILLED;
+		erp->retries = 10;
+		erp->lpm = LPM_ANYPATH;
+		erp->function = dasd_3990_erp_action_1_sec;
+	}
 	return erp;
-
-}				/* end dasd_3990_erp_action_1 */
+}				/* end dasd_3990_erp_action_1(b) */
 
 /*
  * DASD_3990_ERP_ACTION_4
@@ -2295,6 +2308,7 @@ static struct dasd_ccw_req *dasd_3990_erp_add_erp(struct dasd_ccw_req *cqr)
 		return cqr;
 	}
 
+	ccw = cqr->cpaddr;
 	if (cqr->cpmode == 1) {
 		/* make a shallow copy of the original tcw but set new tsb */
 		erp->cpmode = 1;
@@ -2303,6 +2317,9 @@ static struct dasd_ccw_req *dasd_3990_erp_add_erp(struct dasd_ccw_req *cqr)
 		tsb = (struct tsb *) &tcw[1];
 		*tcw = *((struct tcw *)cqr->cpaddr);
 		tcw->tsb = (long)tsb;
+	} else if (ccw->cmd_code == DASD_ECKD_CCW_PSF) {
+		/* PSF cannot be chained from NOOP/TIC */
+		erp->cpaddr = cqr->cpaddr;
 	} else {
 		/* initialize request with default TIC to current ERP/CQR */
 		ccw = erp->cpaddr;
@@ -2487,6 +2504,8 @@ dasd_3990_erp_further_erp(struct dasd_ccw_req *erp)
 
 		erp = dasd_3990_erp_action_1(erp);
 
+	} else if (erp->function == dasd_3990_erp_action_1_sec) {
+		erp = dasd_3990_erp_action_1_sec(erp);
 	} else if (erp->function == dasd_3990_erp_action_5) {
 
 		/* retries have not been successful */
diff --git a/drivers/s390/block/dasd_alias.c b/drivers/s390/block/dasd_alias.c
index 70a008c0052..fd1231738ef 100644
--- a/drivers/s390/block/dasd_alias.c
+++ b/drivers/s390/block/dasd_alias.c
@@ -152,6 +152,7 @@ static struct alias_lcu *_allocate_lcu(struct dasd_uid *uid)
 	INIT_WORK(&lcu->suc_data.worker, summary_unit_check_handling_work);
 	INIT_DELAYED_WORK(&lcu->ruac_data.dwork, lcu_update_work);
 	spin_lock_init(&lcu->lock);
+	init_completion(&lcu->lcu_setup);
 	return lcu;
 
 out_err4:
@@ -240,6 +241,67 @@ int dasd_alias_make_device_known_to_lcu(struct dasd_device *device)
 }
 
 /*
+ * The first device to be registered on an LCU will have to do
+ * some additional setup steps to configure that LCU on the
+ * storage server. All further devices should wait with their
+ * initialization until the first device is done.
+ * To synchronize this work, the first device will call
+ * dasd_alias_lcu_setup_complete when it is done, and all
+ * other devices will wait for it with dasd_alias_wait_for_lcu_setup.
+ */
+void dasd_alias_lcu_setup_complete(struct dasd_device *device)
+{
+	struct dasd_eckd_private *private;
+	unsigned long flags;
+	struct alias_server *server;
+	struct alias_lcu *lcu;
+	struct dasd_uid *uid;
+
+	private = (struct dasd_eckd_private *) device->private;
+	uid = &private->uid;
+	lcu = NULL;
+	spin_lock_irqsave(&aliastree.lock, flags);
+	server = _find_server(uid);
+	if (server)
+		lcu = _find_lcu(server, uid);
+	spin_unlock_irqrestore(&aliastree.lock, flags);
+	if (!lcu) {
+		DBF_EVENT_DEVID(DBF_ERR, device->cdev,
+				"could not find lcu for %04x %02x",
+				uid->ssid, uid->real_unit_addr);
+		WARN_ON(1);
+		return;
+	}
+	complete_all(&lcu->lcu_setup);
+}
+
+void dasd_alias_wait_for_lcu_setup(struct dasd_device *device)
+{
+	struct dasd_eckd_private *private;
+	unsigned long flags;
+	struct alias_server *server;
+	struct alias_lcu *lcu;
+	struct dasd_uid *uid;
+
+	private = (struct dasd_eckd_private *) device->private;
+	uid = &private->uid;
+	lcu = NULL;
+	spin_lock_irqsave(&aliastree.lock, flags);
+	server = _find_server(uid);
+	if (server)
+		lcu = _find_lcu(server, uid);
+	spin_unlock_irqrestore(&aliastree.lock, flags);
+	if (!lcu) {
+		DBF_EVENT_DEVID(DBF_ERR, device->cdev,
+				"could not find lcu for %04x %02x",
+				uid->ssid, uid->real_unit_addr);
+		WARN_ON(1);
+		return;
+	}
+	wait_for_completion(&lcu->lcu_setup);
+}
+
+/*
  * This function removes a device from the scope of alias management.
  * The complicated part is to make sure that it is not in use by
  * any of the workers. If necessary cancel the work.
@@ -755,11 +817,11 @@ static void __stop_device_on_lcu(struct dasd_device *device,
 {
 	/* If pos == device then device is already locked! */
 	if (pos == device) {
-		pos->stopped |= DASD_STOPPED_SU;
+		dasd_device_set_stop_bits(pos, DASD_STOPPED_SU);
 		return;
 	}
 	spin_lock(get_ccwdev_lock(pos->cdev));
-	pos->stopped |= DASD_STOPPED_SU;
+	dasd_device_set_stop_bits(pos, DASD_STOPPED_SU);
 	spin_unlock(get_ccwdev_lock(pos->cdev));
 }
 
@@ -793,26 +855,26 @@ static void _unstop_all_devices_on_lcu(struct alias_lcu *lcu)
 
 	list_for_each_entry(device, &lcu->active_devices, alias_list) {
 		spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
-		device->stopped &= ~DASD_STOPPED_SU;
+		dasd_device_remove_stop_bits(device, DASD_STOPPED_SU);
 		spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
 	}
 
 	list_for_each_entry(device, &lcu->inactive_devices, alias_list) {
 		spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
-		device->stopped &= ~DASD_STOPPED_SU;
+		dasd_device_remove_stop_bits(device, DASD_STOPPED_SU);
 		spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
 	}
 
 	list_for_each_entry(pavgroup, &lcu->grouplist, group) {
 		list_for_each_entry(device, &pavgroup->baselist, alias_list) {
 			spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
-			device->stopped &= ~DASD_STOPPED_SU;
+			dasd_device_remove_stop_bits(device, DASD_STOPPED_SU);
 			spin_unlock_irqrestore(get_ccwdev_lock(device->cdev),
 					       flags);
 		}
 		list_for_each_entry(device, &pavgroup->aliaslist, alias_list) {
 			spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
-			device->stopped &= ~DASD_STOPPED_SU;
+			dasd_device_remove_stop_bits(device, DASD_STOPPED_SU);
 			spin_unlock_irqrestore(get_ccwdev_lock(device->cdev),
 					       flags);
 		}
@@ -836,7 +898,8 @@ static void summary_unit_check_handling_work(struct work_struct *work)
 
 	/* 2. reset summary unit check */
 	spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
-	devi