1 files changed, 56 insertions, 45 deletions

diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 811c9d15063..a67e7e60e33 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -1,12 +1,12 @@
 /*
  *  drivers/s390/cio/device.c
  *  bus driver for ccw devices
- *   $Revision: 1.131 $
+ *   $Revision: 1.140 $
  *
  *    Copyright (C) 2002 IBM Deutschland Entwicklung GmbH,
  *			 IBM Corporation
  *    Author(s): Arnd Bergmann (arndb@de.ibm.com)
- *		 Cornelia Huck (cohuck@de.ibm.com)
+ *		 Cornelia Huck (cornelia.huck@de.ibm.com)
  *		 Martin Schwidefsky (schwidefsky@de.ibm.com)
  */
 #include <linux/config.h>
@@ -59,7 +59,7 @@ ccw_bus_match (struct device * dev, struct device_driver * drv)
  * Heavily modeled on pci and usb hotplug.
  */
 static int
-ccw_hotplug (struct device *dev, char **envp, int num_envp,
+ccw_uevent (struct device *dev, char **envp, int num_envp,
 	     char *buffer, int buffer_size)
 {
 	struct ccw_device *cdev = to_ccwdev(dev);
@@ -107,33 +107,29 @@ ccw_hotplug (struct device *dev, char **envp, int num_envp,
 	return 0;
 }
 
-struct bus_type ccw_bus_type = {
-	.name  = "ccw",
-	.match = &ccw_bus_match,
-	.hotplug = &ccw_hotplug,
-};
+struct bus_type ccw_bus_type;
 
-static int io_subchannel_probe (struct device *);
-static int io_subchannel_remove (struct device *);
+static int io_subchannel_probe (struct subchannel *);
+static int io_subchannel_remove (struct subchannel *);
 void io_subchannel_irq (struct device *);
 static int io_subchannel_notify(struct device *, int);
 static void io_subchannel_verify(struct device *);
 static void io_subchannel_ioterm(struct device *);
-static void io_subchannel_shutdown(struct device *);
+static void io_subchannel_shutdown(struct subchannel *);
 
 struct css_driver io_subchannel_driver = {
 	.subchannel_type = SUBCHANNEL_TYPE_IO,
 	.drv = {
 		.name = "io_subchannel",
 		.bus  = &css_bus_type,
-		.probe = &io_subchannel_probe,
-		.remove = &io_subchannel_remove,
-		.shutdown = &io_subchannel_shutdown,
 	},
 	.irq = io_subchannel_irq,
 	.notify = io_subchannel_notify,
 	.verify = io_subchannel_verify,
 	.termination = io_subchannel_ioterm,
+	.probe = io_subchannel_probe,
+	.remove = io_subchannel_remove,
+	.shutdown = io_subchannel_shutdown,
 };
 
 struct workqueue_struct *ccw_device_work;
@@ -374,7 +370,7 @@ online_store (struct device *dev, struct device_attribute *attr, const char *buf
 	int i, force, ret;
 	char *tmp;
 
-	if (atomic_compare_and_swap(0, 1, &cdev->private->onoff))
+	if (atomic_cmpxchg(&cdev->private->onoff, 0, 1) != 0)
 		return -EAGAIN;
 
 	if (cdev->drv && !try_module_get(cdev->drv->owner)) {
@@ -535,7 +531,8 @@ ccw_device_register(struct ccw_device *cdev)
 }
 
 struct match_data {
-	unsigned int  devno;
+	unsigned int devno;
+	unsigned int ssid;
 	struct ccw_device * sibling;
 };
 
@@ -548,6 +545,7 @@ match_devno(struct device * dev, void * data)
 	cdev = to_ccwdev(dev);
 	if ((cdev->private->state == DEV_STATE_DISCONNECTED) &&
 	    (cdev->private->devno == d->devno) &&
+	    (cdev->private->ssid == d->ssid) &&
 	    (cdev != d->sibling)) {
 		cdev->private->state = DEV_STATE_NOT_OPER;
 		return 1;
@@ -556,11 +554,13 @@ match_devno(struct device * dev, void * data)
 }
 
 static struct ccw_device *
-get_disc_ccwdev_by_devno(unsigned int devno, struct ccw_device *sibling)
+get_disc_ccwdev_by_devno(unsigned int devno, unsigned int ssid,
+			 struct ccw_device *sibling)
 {
 	struct device *dev;
 	struct match_data data = {
-		.devno  = devno,
+		.devno   = devno,
+		.ssid    = ssid,
 		.sibling = sibling,
 	};
 
@@ -616,13 +616,13 @@ ccw_device_do_unreg_rereg(void *data)
 
 		need_rename = 1;
 		other_cdev = get_disc_ccwdev_by_devno(sch->schib.pmcw.dev,
-						      cdev);
+						      sch->schid.ssid, cdev);
 		if (other_cdev) {
 			struct subchannel *other_sch;
 
 			other_sch = to_subchannel(other_cdev->dev.parent);
 			if (get_device(&other_sch->dev)) {
-				stsch(other_sch->irq, &other_sch->schib);
+				stsch(other_sch->schid, &other_sch->schib);
 				if (other_sch->schib.pmcw.dnv) {
 					other_sch->schib.pmcw.intparm = 0;
 					cio_modify(other_sch);
@@ -639,8 +639,8 @@ ccw_device_do_unreg_rereg(void *data)
 	if (test_and_clear_bit(1, &cdev->private->registered))
 		device_del(&cdev->dev);
 	if (need_rename)
-		snprintf (cdev->dev.bus_id, BUS_ID_SIZE, "0.0.%04x",
-			  sch->schib.pmcw.dev);
+		snprintf (cdev->dev.bus_id, BUS_ID_SIZE, "0.%x.%04x",
+			  sch->schid.ssid, sch->schib.pmcw.dev);
 	PREPARE_WORK(&cdev->private->kick_work,
 		     ccw_device_add_changed, (void *)cdev);
 	queue_work(ccw_device_work, &cdev->private->kick_work);
@@ -769,18 +769,20 @@ io_subchannel_recog(struct ccw_device *cdev, struct subchannel *sch)
 	sch->dev.driver_data = cdev;
 	sch->driver = &io_subchannel_driver;
 	cdev->ccwlock = &sch->lock;
+
 	/* Init private data. */
 	priv = cdev->private;
 	priv->devno = sch->schib.pmcw.dev;
-	priv->irq = sch->irq;
+	priv->ssid = sch->schid.ssid;
+	priv->sch_no = sch->schid.sch_no;
 	priv->state = DEV_STATE_NOT_OPER;
 	INIT_LIST_HEAD(&priv->cmb_list);
 	init_waitqueue_head(&priv->wait_q);
 	init_timer(&priv->timer);
 
 	/* Set an initial name for the device. */
-	snprintf (cdev->dev.bus_id, BUS_ID_SIZE, "0.0.%04x",
-		  sch->schib.pmcw.dev);
+	snprintf (cdev->dev.bus_id, BUS_ID_SIZE, "0.%x.%04x",
+		  sch->schid.ssid, sch->schib.pmcw.dev);
 
 	/* Increase counter of devices currently in recognition. */
 	atomic_inc(&ccw_device_init_count);
@@ -797,14 +799,12 @@ io_subchannel_recog(struct ccw_device *cdev, struct subchannel *sch)
 }
 
 static int
-io_subchannel_probe (struct device *pdev)
+io_subchannel_probe (struct subchannel *sch)
 {
-	struct subchannel *sch;
 	struct ccw_device *cdev;
 	int rc;
 	unsigned long flags;
 
-	sch = to_subchannel(pdev);
 	if (sch->dev.driver_data) {
 		/*
 		 * This subchannel already has an associated ccw_device.
@@ -840,7 +840,7 @@ io_subchannel_probe (struct device *pdev)
 	memset(cdev->private, 0, sizeof(struct ccw_device_private));
 	atomic_set(&cdev->private->onoff, 0);
 	cdev->dev = (struct device) {
-		.parent = pdev,
+		.parent = &sch->dev,
 		.release = ccw_device_release,
 	};
 	INIT_LIST_HEAD(&cdev->private->kick_work.entry);
@@ -853,7 +853,7 @@ io_subchannel_probe (struct device *pdev)
 		return -ENODEV;
 	}
 
-	rc = io_subchannel_recog(cdev, to_subchannel(pdev));
+	rc = io_subchannel_recog(cdev, sch);
 	if (rc) {
 		spin_lock_irqsave(&sch->lock, flags);
 		sch->dev.driver_data = NULL;
@@ -877,17 +877,17 @@ ccw_device_unregister(void *data)
 }
 
 static int
-io_subchannel_remove (struct device *dev)
+io_subchannel_remove (struct subchannel *sch)
 {
 	struct ccw_device *cdev;
 	unsigned long flags;
 
-	if (!dev->driver_data)
+	if (!sch->dev.driver_data)
 		return 0;
-	cdev = dev->driver_data;
+	cdev = sch->dev.driver_data;
 	/* Set ccw device to not operational and drop reference. */
 	spin_lock_irqsave(cdev->ccwlock, flags);
-	dev->driver_data = NULL;
+	sch->dev.driver_data = NULL;
 	cdev->private->state = DEV_STATE_NOT_OPER;
 	spin_unlock_irqrestore(cdev->ccwlock, flags);
 	/*
@@ -942,16 +942,14 @@ io_subchannel_ioterm(struct device *dev)
 }
 
 static void
-io_subchannel_shutdown(struct device *dev)
+io_subchannel_shutdown(struct subchannel *sch)
 {
-	struct subchannel *sch;
 	struct ccw_device *cdev;
 	int ret;
 
-	sch = to_subchannel(dev);
-	cdev = dev->driver_data;
+	cdev = sch->dev.driver_data;
 
-	if (cio_is_console(sch->irq))
+	if (cio_is_console(sch->schid))
 		return;
 	if (!sch->schib.pmcw.ena)
 		/* Nothing to do. */
@@ -986,10 +984,6 @@ ccw_device_console_enable (struct ccw_device *cdev, struct subchannel *sch)
 	cdev->dev = (struct device) {
 		.parent = &sch->dev,
 	};
-	/* Initialize the subchannel structure */
-	sch->dev.parent = &css_bus_device;
-	sch->dev.bus = &css_bus_type;
-
 	rc = io_subchannel_recog(cdev, sch);
 	if (rc)
 		return rc;
@@ -1127,6 +1121,14 @@ ccw_device_remove (struct device *dev)
 	return 0;
 }
 
+struct bus_type ccw_bus_type = {
+	.name   = "ccw",
+	.match  = ccw_bus_match,
+	.uevent = ccw_uevent,
+	.probe  = ccw_device_probe,
+	.remove = ccw_device_remove,
+};
+
 int
 ccw_driver_register (struct ccw_driver *cdriver)
 {
@@ -1134,8 +1136,6 @@ ccw_driver_register (struct ccw_driver *cdriver)
 
 	drv->bus = &ccw_bus_type;
 	drv->name = cdriver->name;
-	drv->probe = ccw_device_probe;
-	drv->remove = ccw_device_remove;
 
 	return driver_register(drv);
 }
@@ -1146,6 +1146,16 @@ ccw_driver_unregister (struct ccw_driver *cdriver)
 	driver_unregister(&cdriver->driver);
 }
 
+/* Helper func for qdio. */
+struct subchannel_id
+ccw_device_get_subchannel_id(struct ccw_device *cdev)
+{
+	struct subchannel *sch;
+
+	sch = to_subchannel(cdev->dev.parent);
+	return sch->schid;
+}
+
 MODULE_LICENSE("GPL");
 EXPORT_SYMBOL(ccw_device_set_online);
 EXPORT_SYMBOL(ccw_device_set_offline);
@@ -1155,3 +1165,4 @@ EXPORT_SYMBOL(get_ccwdev_by_busid);
 EXPORT_SYMBOL(ccw_bus_type);
 EXPORT_SYMBOL(ccw_device_work);
 EXPORT_SYMBOL(ccw_device_notify_work);
+EXPORT_SYMBOL_GPL(ccw_device_get_subchannel_id);