From rmk+greg=kroah.com@arm.linux.org.uk Thu Jan 5 06:31:35 2006 From: Russell King CC: Greg K-H Subject: [CFT 1/29] Add bus_type probe, remove, shutdown methods. Date: Thu, 05 Jan 2006 14:29:51 +0000 Message-ID: <20060105142951.13.01@flint.arm.linux.org.uk> Add bus_type probe, remove and shutdown methods to replace the corresponding methods in struct device_driver. This matches the way we handle the suspend/resume methods. Since the bus methods override the device_driver methods, warn if a device driver is registered whose methods will not be called. The long-term idea is to remove the device_driver methods entirely. Signed-off-by: Russell King Signed-off-by: Greg Kroah-Hartman --- drivers/base/dd.c | 12 ++++++++++-- drivers/base/driver.c | 5 +++++ drivers/base/power/shutdown.c | 5 ++++- include/linux/device.h | 3 +++ 4 files changed, 22 insertions(+), 3 deletions(-) --- gregkh-2.6.orig/drivers/base/dd.c +++ gregkh-2.6/drivers/base/dd.c @@ -78,7 +78,13 @@ int driver_probe_device(struct device_dr pr_debug("%s: Matched Device %s with Driver %s\n", drv->bus->name, dev->bus_id, drv->name); dev->driver = drv; - if (drv->probe) { + if (dev->bus->probe) { + ret = dev->bus->probe(dev); + if (ret) { + dev->driver = NULL; + goto ProbeFailed; + } + } else if (drv->probe) { ret = drv->probe(dev); if (ret) { dev->driver = NULL; @@ -203,7 +209,9 @@ static void __device_release_driver(stru sysfs_remove_link(&dev->kobj, "driver"); klist_remove(&dev->knode_driver); - if (drv->remove) + if (dev->bus->remove) + dev->bus->remove(dev); + else if (drv->remove) drv->remove(dev); dev->driver = NULL; put_driver(drv); --- gregkh-2.6.orig/drivers/base/driver.c +++ gregkh-2.6/drivers/base/driver.c @@ -171,6 +171,11 @@ static void klist_devices_put(struct kli */ int driver_register(struct device_driver * drv) { + if ((drv->bus->probe && drv->probe) || + (drv->bus->remove && drv->remove) || + (drv->bus->shutdown && drv->shutdown)) { + printk(KERN_WARNING "Driver '%s' needs updating - please use bus_type methods\n", drv->name); + } klist_init(&drv->klist_devices, klist_devices_get, klist_devices_put); init_completion(&drv->unloaded); return bus_add_driver(drv); --- gregkh-2.6.orig/drivers/base/power/shutdown.c +++ gregkh-2.6/drivers/base/power/shutdown.c @@ -40,7 +40,10 @@ void device_shutdown(void) down_write(&devices_subsys.rwsem); list_for_each_entry_reverse(dev, &devices_subsys.kset.list, kobj.entry) { - if (dev->driver && dev->driver->shutdown) { + if (dev->bus && dev->bus->shutdown) { + dev_dbg(dev, "shutdown\n"); + dev->bus->shutdown(dev); + } else if (dev->driver && dev->driver->shutdown) { dev_dbg(dev, "shutdown\n"); dev->driver->shutdown(dev); } --- gregkh-2.6.orig/include/linux/device.h +++ gregkh-2.6/include/linux/device.h @@ -49,6 +49,9 @@ struct bus_type { int (*match)(struct device * dev, struct device_driver * drv); int (*uevent)(struct device *dev, char **envp, int num_envp, char *buffer, int buffer_size); + int (*probe)(struct device * dev); + int (*remove)(struct device * dev); + void (*shutdown)(struct device * dev); int (*suspend)(struct device * dev, pm_message_t state); int (*resume)(struct device * dev); };