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[PATCH] driver core: add helper device_is_registered()

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add the helper and use it instead of open coding the klist_node_attached() check
(which is a layering violation IMHO)

idea by Alan Stern.

Signed-off-by: Daniel Ritz <daniel.ritz@gmx.ch>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Daniel Ritz 2005-09-22 00:47:24 -07:00 committed by Linus Torvalds
parent 4c898c7f2f
commit d305ef5d2a
4 changed files with 10 additions and 5 deletions
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2
drivers/s390/cio/ccwgroup.c
View File

@ -437,7 +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 (klist_node_attached(&gdev->dev.knode_bus))
if (device_is_registered(&gdev->dev))
return gdev;
put_device(&gdev->dev);
}

2
drivers/usb/core/message.c
View File

@ -987,7 +987,7 @@ void usb_disable_device(struct usb_device *dev, int skip_ep0)
/* remove this interface if it has been registered */
interface = dev->actconfig->interface[i];
if (!klist_node_attached(&interface->dev.knode_bus))
if (!device_is_registered(&interface->dev))
continue;
dev_dbg (&dev->dev, "unregistering interface %s\n",
interface->dev.bus_id);

6
drivers/usb/core/usb.c
View File

@ -303,7 +303,7 @@ int usb_driver_claim_interface(struct usb_driver *driver,
/* if interface was already added, bind now; else let
* the future device_add() bind it, bypassing probe()
*/
if (klist_node_attached(&dev->knode_bus))
if (device_is_registered(dev))
device_bind_driver(dev);
return 0;
@ -336,8 +336,8 @@ void usb_driver_release_interface(struct usb_driver *driver,
if (iface->condition != USB_INTERFACE_BOUND)
return;
/* release only after device_add() */
if (klist_node_attached(&dev->knode_bus)) {
/* don't release if the interface hasn't been added yet */
if (device_is_registered(dev)) {
iface->condition = USB_INTERFACE_UNBINDING;
device_release_driver(dev);
}

5
include/linux/device.h
View File

@ -317,6 +317,11 @@ dev_set_drvdata (struct device *dev, void *data)
dev->driver_data = data;
}
static inline int device_is_registered(struct device *dev)
{
return klist_node_attached(&dev->knode_bus);
}
/*
* High level routines for use by the bus drivers
*/