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[S390] cio: Use unbind/bind instead of unregister/register.

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The common I/O layer may encounter a situation where the
device number of a ccw device has changed or a device
driver doesn't want to keep a formerly disconnected device
becoming operational again. Instead of using device_del()/
device_add() as now, we can just unbind the driver from the
device and rebind it to get the desired effect (rebinding)
with less overhead.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Cornelia Huck
2009-03-26 15:24:05 +01:00
committed by Martin Schwidefsky
parent 1485c5c884
commit eb32ae8d0e
3 changed files with 10 additions and 23 deletions
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4
drivers/s390/cio/device_fsm.c
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@@ -194,7 +194,7 @@ ccw_device_handle_oper(struct ccw_device *cdev)
cdev->id.dev_type != cdev->private->senseid.dev_type ||
cdev->id.dev_model != cdev->private->senseid.dev_model) {
PREPARE_WORK(&cdev->private->kick_work,
ccw_device_do_unreg_rereg);
ccw_device_do_unbind_bind);
queue_work(ccw_device_work, &cdev->private->kick_work);
return 0;
}
@@ -366,7 +366,7 @@ static void ccw_device_oper_notify(struct ccw_device *cdev)
}
/* Driver doesn't want device back. */
ccw_device_set_notoper(cdev);
PREPARE_WORK(&cdev->private->kick_work, ccw_device_do_unreg_rereg);
PREPARE_WORK(&cdev->private->kick_work, ccw_device_do_unbind_bind);
queue_work(ccw_device_work, &cdev->private->kick_work);
}