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[PATCH] s/390: Use klist in cio 

Convert the common I/O layer to use the klist interfaces.

This patch has been adapted from the previous version to the changed interface
semantics.  Also, gcc 4.0 compile warnings have been removed.

Signed-off-by: Cornelia Huck <cohuck@de.ibm.com>
Cc: Greg KH <greg@kroah.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Cornelia Huck 2005-06-25 14:55:27 -07:00 committed by Linus Torvalds
parent 84dd8d7e9c
commit b0744bd292
3 changed files with 66 additions and 82 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
drivers/s390/cio/ccwgroup.c
View File

@ -403,34 +403,22 @@ ccwgroup_driver_register (struct ccwgroup_driver *cdriver)
return driver_register(&cdriver->driver);
}
static inline struct device *
__get_next_ccwgroup_device(struct device_driver *drv)
static int
__ccwgroup_driver_unregister_device(struct device *dev, void *data)
{
struct device *dev, *d;
down_read(&drv->bus->subsys.rwsem);
dev = NULL;
list_for_each_entry(d, &drv->devices, driver_list) {
dev = get_device(d);
if (dev)
break;
}
up_read(&drv->bus->subsys.rwsem);
return dev;
__ccwgroup_remove_symlinks(to_ccwgroupdev(dev));
device_unregister(dev);
put_device(dev);
return 0;
}
void
ccwgroup_driver_unregister (struct ccwgroup_driver *cdriver)
{
struct device *dev;
/* We don't want ccwgroup devices to live longer than their driver. */
get_driver(&cdriver->driver);
while ((dev = __get_next_ccwgroup_device(&cdriver->driver))) {
__ccwgroup_remove_symlinks(to_ccwgroupdev(dev));
device_unregister(dev);
put_device(dev);
};
driver_for_each_device(&cdriver->driver, NULL, NULL,
__ccwgroup_driver_unregister_device);
put_driver(&cdriver->driver);
driver_unregister(&cdriver->driver);
}
@ -449,7 +437,7 @@ __ccwgroup_get_gdev_by_cdev(struct ccw_device *cdev)
if (cdev->dev.driver_data) {
gdev = (struct ccwgroup_device *)cdev->dev.driver_data;
if (get_device(&gdev->dev)) {
if (!list_empty(&gdev->dev.node))
if (klist_node_attached(&gdev->dev.knode_bus))
return gdev;
put_device(&gdev->dev);
}

34
drivers/s390/cio/css.c
View File

@ -128,34 +128,28 @@ css_probe_device(int irq)
return ret;
}
static int
check_subchannel(struct device * dev, void * data)
{
struct subchannel *sch;
int irq = (unsigned long)data;
sch = to_subchannel(dev);
return (sch->irq == irq);
}
struct subchannel *
get_subchannel_by_schid(int irq)
{
struct subchannel *sch;
struct list_head *entry;
struct device *dev;
if (!get_bus(&css_bus_type))
return NULL;
down_read(&css_bus_type.subsys.rwsem);
sch = NULL;
list_for_each(entry, &css_bus_type.devices.list) {
dev = get_device(container_of(entry,
struct device, bus_list));
if (!dev)
continue;
sch = to_subchannel(dev);
if (sch->irq == irq)
break;
put_device(dev);
sch = NULL;
}
up_read(&css_bus_type.subsys.rwsem);
put_bus(&css_bus_type);
dev = bus_find_device(&css_bus_type, NULL,
(void *)(unsigned long)irq, check_subchannel);
return sch;
return dev ? to_subchannel(dev) : NULL;
}
static inline int
css_get_subchannel_status(struct subchannel *sch, int schid)
{

84
drivers/s390/cio/device.c
View File

@ -514,36 +514,39 @@ ccw_device_register(struct ccw_device *cdev)
return ret;
}
struct match_data {
unsigned int devno;
struct ccw_device * sibling;
};
static int
match_devno(struct device * dev, void * data)
{
struct match_data * d = (struct match_data *)data;
struct ccw_device * cdev;
cdev = to_ccwdev(dev);
if ((cdev->private->state == DEV_STATE_DISCONNECTED) &&
(cdev->private->devno == d->devno) &&
(cdev != d->sibling)) {
cdev->private->state = DEV_STATE_NOT_OPER;
return 1;
}
return 0;
}
static struct ccw_device *
get_disc_ccwdev_by_devno(unsigned int devno, struct ccw_device *sibling)
{
struct ccw_device *cdev;
struct list_head *entry;
struct device *dev;
struct match_data data = {
.devno = devno,
.sibling = sibling,
};
if (!get_bus(&ccw_bus_type))
return NULL;
down_read(&ccw_bus_type.subsys.rwsem);
cdev = NULL;
list_for_each(entry, &ccw_bus_type.devices.list) {
dev = get_device(container_of(entry,
struct device, bus_list));
if (!dev)
continue;
cdev = to_ccwdev(dev);
if ((cdev->private->state == DEV_STATE_DISCONNECTED) &&
(cdev->private->devno == devno) &&
(cdev != sibling)) {
cdev->private->state = DEV_STATE_NOT_OPER;
break;
}
put_device(dev);
cdev = NULL;
}
up_read(&ccw_bus_type.subsys.rwsem);
put_bus(&ccw_bus_type);
dev = bus_find_device(&css_bus_type, NULL, &data, match_devno);
return cdev;
return dev ? to_ccwdev(dev) : NULL;
}
static void
@ -647,7 +650,7 @@ io_subchannel_register(void *data)
cdev = (struct ccw_device *) data;
sch = to_subchannel(cdev->dev.parent);
if (!list_empty(&sch->dev.children)) {
if (klist_node_attached(&cdev->dev.knode_parent)) {
bus_rescan_devices(&ccw_bus_type);
goto out;
}
@ -1019,30 +1022,29 @@ ccw_device_probe_console(void)
/*
* get ccw_device matching the busid, but only if owned by cdrv
*/
static int
__ccwdev_check_busid(struct device *dev, void *id)
{
char *bus_id;
bus_id = (char *)id;
return (strncmp(bus_id, dev->bus_id, BUS_ID_SIZE) == 0);
}
struct ccw_device *
get_ccwdev_by_busid(struct ccw_driver *cdrv, const char *bus_id)
{
struct device *d, *dev;
struct device *dev;
struct device_driver *drv;
drv = get_driver(&cdrv->driver);
if (!drv)
return 0;
return NULL;
down_read(&drv->bus->subsys.rwsem);
dev = NULL;
list_for_each_entry(d, &drv->devices, driver_list) {
dev = get_device(d);
if (dev && !strncmp(bus_id, dev->bus_id, BUS_ID_SIZE))
break;
else if (dev) {
put_device(dev);
dev = NULL;
}
}
up_read(&drv->bus->subsys.rwsem);
dev = driver_find_device(drv, NULL, (void *)bus_id,
__ccwdev_check_busid);
put_driver(drv);
return dev ? to_ccwdev(dev) : 0;