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authorAlan Stern <stern@rowland.harvard.edu>2006-09-18 16:24:28 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2006-09-25 21:08:40 -0700
commit81107bf531d2524afbcd61f3b4ad57a71295d591 (patch)
tree8c4f985714432bee996720c2d8e4bcfbe3d70575 /drivers/base/driver.c
parentf2eaae197f4590c4d96f31b09b0ee9067421a95c (diff)
downloadop-kernel-dev-81107bf531d2524afbcd61f3b4ad57a71295d591.zip
op-kernel-dev-81107bf531d2524afbcd61f3b4ad57a71295d591.tar.gz
Driver core: Remove unneeded routines from driver core
This patch (as783) simplifies the driver core slightly by removing four unnecessary _get and _put methods. It is vital that when a driver is removed from its bus's klist of registered drivers, or when a device is removed from a driver's klist of bound devices, that the klist updates complete synchronously. Otherwise the kernel might try binding an unregistered driver to a newly-registered device, or adding a device to the klist for a new driver before it has been removed from the old driver's klist. Since the removals must be synchronous, they don't need to update any reference counts. Hence the _get and _put methods can be dispensed with. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/base/driver.c')
-rw-r--r--drivers/base/driver.c16
1 files changed, 1 insertions, 15 deletions
diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index 562600d..1214cbd 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -142,20 +142,6 @@ void put_driver(struct device_driver * drv)
kobject_put(&drv->kobj);
}
-static void klist_devices_get(struct klist_node *n)
-{
- struct device *dev = container_of(n, struct device, knode_driver);
-
- get_device(dev);
-}
-
-static void klist_devices_put(struct klist_node *n)
-{
- struct device *dev = container_of(n, struct device, knode_driver);
-
- put_device(dev);
-}
-
/**
* driver_register - register driver with bus
* @drv: driver to register
@@ -175,7 +161,7 @@ int driver_register(struct device_driver * drv)
(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);
+ klist_init(&drv->klist_devices, NULL, NULL);
init_completion(&drv->unloaded);
return bus_add_driver(drv);
}
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