Merge branch 'linus' into perfcounters/core

Merge reason: This brach was on -rc1, refresh it to almost-rc4 to pick up
              the latest upstream fixes.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

7 files changed, 46 insertions, 73 deletions

diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 0570794ccf1..d1815272c43 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -20,6 +20,7 @@
 #include <linux/slab.h>
 #include <linux/buffer_head.h>
 #include <linux/hdreg.h>
+#include <linux/async.h>
 
 #include <asm/ccwdev.h>
 #include <asm/ebcdic.h>
@@ -480,8 +481,10 @@ static void dasd_change_state(struct dasd_device *device)
         if (rc && rc != -EAGAIN)
                 device->target = device->state;
 
-	if (device->state == device->target)
+	if (device->state == device->target) {
 		wake_up(&dasd_init_waitq);
+		dasd_put_device(device);
+	}
 
 	/* let user-space know that the device status changed */
 	kobject_uevent(&device->cdev->dev.kobj, KOBJ_CHANGE);
@@ -513,12 +516,15 @@ void dasd_kick_device(struct dasd_device *device)
  */
 void dasd_set_target_state(struct dasd_device *device, int target)
 {
+	dasd_get_device(device);
 	/* If we are in probeonly mode stop at DASD_STATE_READY. */
 	if (dasd_probeonly && target > DASD_STATE_READY)
 		target = DASD_STATE_READY;
 	if (device->target != target) {
-                if (device->state == target)
+		if (device->state == target) {
 			wake_up(&dasd_init_waitq);
+			dasd_put_device(device);
+		}
 		device->target = target;
 	}
 	if (device->state != device->target)
@@ -2148,6 +2154,22 @@ dasd_exit(void)
  * SECTION: common functions for ccw_driver use
  */
 
+static void dasd_generic_auto_online(void *data, async_cookie_t cookie)
+{
+	struct ccw_device *cdev = data;
+	int ret;
+
+	ret = ccw_device_set_online(cdev);
+	if (ret)
+		pr_warning("%s: Setting the DASD online failed with rc=%d\n",
+			   dev_name(&cdev->dev), ret);
+	else {
+		struct dasd_device *device = dasd_device_from_cdev(cdev);
+		wait_event(dasd_init_waitq, _wait_for_device(device));
+		dasd_put_device(device);
+	}
+}
+
 /*
  * Initial attempt at a probe function. this can be simplified once
  * the other detection code is gone.
@@ -2180,10 +2202,7 @@ int dasd_generic_probe(struct ccw_device *cdev,
 	 */
 	if ((dasd_get_feature(cdev, DASD_FEATURE_INITIAL_ONLINE) > 0 ) ||
 	    (dasd_autodetect && dasd_busid_known(dev_name(&cdev->dev)) != 0))
-		ret = ccw_device_set_online(cdev);
-	if (ret)
-		pr_warning("%s: Setting the DASD online failed with rc=%d\n",
-		       dev_name(&cdev->dev), ret);
+		async_schedule(dasd_generic_auto_online, cdev);
 	return 0;
 }
 
@@ -2290,13 +2309,7 @@ int dasd_generic_set_online(struct ccw_device *cdev,
 	} else
 		pr_debug("dasd_generic device %s found\n",
 				dev_name(&cdev->dev));
-
-	/* FIXME: we have to wait for the root device but we don't want
-	 * to wait for each single device but for all at once. */
-	wait_event(dasd_init_waitq, _wait_for_device(device));
-
 	dasd_put_device(device);
-
 	return rc;
 }
 
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 21254793c60..cb52da033f0 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -2019,15 +2019,23 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
 				ccw++;
 				recid += count;
 				new_track = 0;
+				/* first idaw for a ccw may start anywhere */
+				if (!idaw_dst)
+					idaw_dst = dst;
 			}
-			/* If we start a new idaw, everything is fine and the
-			 * start of the new idaw is the start of this segment.
+			/* If we start a new idaw, we must make sure that it
+			 * starts on an IDA_BLOCK_SIZE boundary.
 			 * If we continue an idaw, we must make sure that the
 			 * current segment begins where the so far accumulated
 			 * idaw ends
 			 */
-			if (!idaw_dst)
-				idaw_dst = dst;
+			if (!idaw_dst) {
+				if (__pa(dst) & (IDA_BLOCK_SIZE-1)) {
+					dasd_sfree_request(cqr, startdev);
+					return ERR_PTR(-ERANGE);
+				} else
+					idaw_dst = dst;
+			}
 			if ((idaw_dst + idaw_len) != dst) {
 				dasd_sfree_request(cqr, startdev);
 				return ERR_PTR(-ERANGE);
diff --git a/drivers/s390/char/tape.h b/drivers/s390/char/tape.h
index c07809c8016..5469e099597 100644
--- a/drivers/s390/char/tape.h
+++ b/drivers/s390/char/tape.h
@@ -285,7 +285,7 @@ extern int tape_mtop(struct tape_device *, int, int);
 extern void tape_state_set(struct tape_device *, enum tape_state);
 
 extern int tape_generic_online(struct tape_device *, struct tape_discipline *);
-extern int tape_generic_offline(struct tape_device *device);
+extern int tape_generic_offline(struct ccw_device *);
 
 /* Externals from tape_devmap.c */
 extern int tape_generic_probe(struct ccw_device *);
diff --git a/drivers/s390/char/tape_34xx.c b/drivers/s390/char/tape_34xx.c
index 807ded5eb04..5f8e8ef43dd 100644
--- a/drivers/s390/char/tape_34xx.c
+++ b/drivers/s390/char/tape_34xx.c
@@ -1294,12 +1294,6 @@ tape_34xx_online(struct ccw_device *cdev)
 	);
 }
 
-static int
-tape_34xx_offline(struct ccw_device *cdev)
-{
-	return tape_generic_offline(cdev->dev.driver_data);
-}
-
 static struct ccw_driver tape_34xx_driver = {
 	.name = "tape_34xx",
 	.owner = THIS_MODULE,
@@ -1307,7 +1301,7 @@ static struct ccw_driver tape_34xx_driver = {
 	.probe = tape_generic_probe,
 	.remove = tape_generic_remove,
 	.set_online = tape_34xx_online,
-	.set_offline = tape_34xx_offline,
+	.set_offline = tape_generic_offline,
 };
 
 static int
diff --git a/drivers/s390/char/tape_3590.c b/drivers/s390/char/tape_3590.c
index fc1d9129414..823b05bd0dd 100644
--- a/drivers/s390/char/tape_3590.c
+++ b/drivers/s390/char/tape_3590.c
@@ -1707,19 +1707,13 @@ tape_3590_online(struct ccw_device *cdev)
 				   &tape_discipline_3590);
 }
 
-static int
-tape_3590_offline(struct ccw_device *cdev)
-{
-	return tape_generic_offline(cdev->dev.driver_data);
-}
-
 static struct ccw_driver tape_3590_driver = {
 	.name = "tape_3590",
 	.owner = THIS_MODULE,
 	.ids = tape_3590_ids,
 	.probe = tape_generic_probe,
 	.remove = tape_generic_remove,
-	.set_offline = tape_3590_offline,
+	.set_offline = tape_generic_offline,
 	.set_online = tape_3590_online,
 };
 
diff --git a/drivers/s390/char/tape_core.c b/drivers/s390/char/tape_core.c
index 08c09d3503c..8a109f3b69c 100644
--- a/drivers/s390/char/tape_core.c
+++ b/drivers/s390/char/tape_core.c
@@ -387,8 +387,11 @@ tape_cleanup_device(struct tape_device *device)
  * Manual offline is only allowed while the drive is not in use.
  */
 int
-tape_generic_offline(struct tape_device *device)
+tape_generic_offline(struct ccw_device *cdev)
 {
+	struct tape_device *device;
+
+	device = cdev->dev.driver_data;
 	if (!device) {
 		return -ENODEV;
 	}
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index 9e8a2914259..accd957454e 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -881,42 +881,6 @@ no_handler:
 	qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
 }
 
-static void qdio_call_shutdown(struct work_struct *work)
-{
-	struct ccw_device_private *priv;
-	struct ccw_device *cdev;
-
-	priv = container_of(work, struct ccw_device_private, kick_work);
-	cdev = priv->cdev;
-	qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
-	put_device(&cdev->dev);
-}
-
-static void qdio_int_error(struct ccw_device *cdev)
-{
-	struct qdio_irq *irq_ptr = cdev->private->qdio_data;
-
-	switch (irq_ptr->state) {
-	case QDIO_IRQ_STATE_INACTIVE:
-	case QDIO_IRQ_STATE_CLEANUP:
-		qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
-		break;
-	case QDIO_IRQ_STATE_ESTABLISHED:
-	case QDIO_IRQ_STATE_ACTIVE:
-		qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
-		if (get_device(&cdev->dev)) {
-			/* Can't call shutdown from interrupt context. */
-			PREPARE_WORK(&cdev->private->kick_work,
-				     qdio_call_shutdown);
-			queue_work(ccw_device_work, &cdev->private->kick_work);
-		}
-		break;
-	default:
-		WARN_ON(1);
-	}
-	wake_up(&cdev->private->wait_q);
-}
-
 static int qdio_establish_check_errors(struct ccw_device *cdev, int cstat,
 				       int dstat)
 {
@@ -973,10 +937,8 @@ void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
 		switch (PTR_ERR(irb)) {
 		case -EIO:
 			DBF_ERROR("%4x IO error", irq_ptr->schid.sch_no);
-			return;
-		case -ETIMEDOUT:
-			DBF_ERROR("%4x IO timeout", irq_ptr->schid.sch_no);
-			qdio_int_error(cdev);
+			qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
+			wake_up(&cdev->private->wait_q);
 			return;
 		default:
 			WARN_ON(1);
@@ -1001,7 +963,6 @@ void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
 	case QDIO_IRQ_STATE_ACTIVE:
 		if (cstat & SCHN_STAT_PCI) {
 			qdio_int_handler_pci(irq_ptr);
-			/* no state change so no need to wake up wait_q */
 			return;
 		}
 		if ((cstat & ~SCHN_STAT_PCI) || dstat) {