[PATCH] driver core: add helper device_is_registered()
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>
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index 087af73..7d13150 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -303,7 +303,7 @@
/* 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 @@
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);
}