[PATCH] Add {css,ccw}_bus_type probe, remove, shutdown methods.

The following patch converts css_bus_type and ccw_bus_type to use
the new bus_type methods.

Signed-off-by: Cornelia Huck <huckc@de.ibm.com>
CC: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

3 files changed, 62 insertions, 28 deletions

diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index e565193650c..2d319fb812c 100644
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -542,9 +542,41 @@ css_bus_match (struct device *dev, struct device_driver *drv)
         return 0;
 }
 
+static int
+css_probe (struct device *dev)
+{
+        struct subchannel *sch;
+
+        sch = to_subchannel(dev);
+        sch->driver = container_of (dev->driver, struct css_driver, drv);
+        return (sch->driver->probe ? sch->driver->probe(sch) : 0);
+}
+
+static int
+css_remove (struct device *dev)
+{
+        struct subchannel *sch;
+
+        sch = to_subchannel(dev);
+        return (sch->driver->remove ? sch->driver->remove(sch) : 0);
+}
+
+static void
+css_shutdown (struct device *dev)
+{
+        struct subchannel *sch;
+
+        sch = to_subchannel(dev);
+        if (sch->driver->shutdown)
+                sch->driver->shutdown(sch);
+}
+
 struct bus_type css_bus_type = {
-        .name  = "css",
-        .match = &css_bus_match,
+        .name     = "css",
+        .match    = css_bus_match,
+        .probe    = css_probe,
+        .remove   = css_remove,
+        .shutdown = css_shutdown,
 };
 
 subsys_initcall(init_channel_subsystem);
diff --git a/drivers/s390/cio/css.h b/drivers/s390/cio/css.h
index 251ebd7a7d3..aa5ab5d4547 100644
--- a/drivers/s390/cio/css.h
+++ b/drivers/s390/cio/css.h
@@ -115,6 +115,7 @@ struct ccw_device_private {
  * Currently, we only care about I/O subchannels (type 0), these
  * have a ccw_device connected to them.
  */
+struct subchannel;
 struct css_driver {
         unsigned int subchannel_type;
         struct device_driver drv;
@@ -122,6 +123,9 @@ struct css_driver {
         int (*notify)(struct device *, int);
         void (*verify)(struct device *);
         void (*termination)(struct device *);
+        int (*probe)(struct subchannel *);
+        int (*remove)(struct subchannel *);
+        void (*shutdown)(struct subchannel *);
 };
 
 /*
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index fa3e4c0a253..eb73605a052 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -107,33 +107,29 @@ ccw_uevent (struct device *dev, char **envp, int num_envp,
         return 0;
 }
 
-struct bus_type ccw_bus_type = {
-        .name  = "ccw",
-        .match = &ccw_bus_match,
-        .uevent = &ccw_uevent,
-};
+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;
@@ -803,14 +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.
@@ -846,7 +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);
@@ -859,7 +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;
@@ -883,17 +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);
         /*
@@ -948,14 +942,12 @@ 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->schid))
                 return;
@@ -1129,6 +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)
 {
@@ -1136,8 +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);
 }