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[PATCH] usbcore: Don't call device_release_driver recursively

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This patch fixes usb_driver_release_interface() to make it avoid calling
device_release_driver() recursively, i.e., when invoked from within the
disconnect routine for the same device.  The patch applies to your
"driver" tree.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern 2005-05-06 15:41:08 -04:00 • committed by Greg Kroah-Hartman
parent c95a6b057b
commit f409661877
1 changed files with 8 additions and 2 deletions
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10
drivers/usb/core/usb.c
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@ -322,9 +322,15 @@ void usb_driver_release_interface(struct usb_driver *driver,
if (!dev->driver || dev->driver != &driver->driver) if (!dev->driver || dev->driver != &driver->driver)
return; return;
/* don't disconnect from disconnect(), or before dev_add() */ /* don't release from within disconnect() */
if (!klist_node_attached(&dev->knode_driver) && !klist_node_attached(&dev->knode_bus)) if (iface->condition != USB_INTERFACE_BOUND)
return;
/* release only after device_add() */
if (klist_node_attached(&dev->knode_bus)) {
iface->condition = USB_INTERFACE_UNBINDING;
device_release_driver(dev); device_release_driver(dev);
}
dev->driver = NULL; dev->driver = NULL;
usb_set_intfdata(iface, NULL); usb_set_intfdata(iface, NULL);