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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 <[email protected]>
Cc: Alan Stern <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Daniel Ritz 2005-09-22 00:47:24 -07:00 • committed by Linus Torvalds
commit d305ef5d2a
4 changed files with 10 additions and 5 deletions
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2
drivers/s390/cio/ccwgroup.c
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@ -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);
}