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[S390] cio: Use device_schedule_callback() for removing disconnected devices.

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We can't deregister disconnected and orphaned devices directly from
the online attribute's store method, but must take a detour.

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 2007-05-31 17:38:06 +02:00 committed by Martin Schwidefsky
parent ea1f4eece9
commit 59a8a6e227
1 changed files with 44 additions and 17 deletions
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61
drivers/s390/cio/device.c
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@ -296,25 +296,19 @@ static void ccw_device_unregister(struct ccw_device *cdev)
device_del(&cdev->dev);
}
static void
ccw_device_remove_disconnected(struct ccw_device *cdev)
static void ccw_device_remove_orphan_cb(struct device *dev)
{
struct ccw_device *cdev = to_ccwdev(dev);
ccw_device_unregister(cdev);
put_device(&cdev->dev);
}
static void ccw_device_remove_sch_cb(struct device *dev)
{
struct subchannel *sch;
unsigned long flags;
/*
* Forced offline in disconnected state means
* 'throw away device'.
*/
if (ccw_device_is_orphan(cdev)) {
/* Deregister ccw device. */
spin_lock_irqsave(cdev->ccwlock, flags);
cdev->private->state = DEV_STATE_NOT_OPER;
spin_unlock_irqrestore(cdev->ccwlock, flags);
ccw_device_unregister(cdev);
put_device(&cdev->dev);
return ;
}
sch = to_subchannel(cdev->dev.parent);
sch = to_subchannel(dev);
css_sch_device_unregister(sch);
/* Reset intparm to zeroes. */
sch->schib.pmcw.intparm = 0;
@ -322,6 +316,39 @@ ccw_device_remove_disconnected(struct ccw_device *cdev)
put_device(&sch->dev);
}
static void
ccw_device_remove_disconnected(struct ccw_device *cdev)
{
unsigned long flags;
int rc;
/*
* Forced offline in disconnected state means
* 'throw away device'.
*/
if (ccw_device_is_orphan(cdev)) {
/*
* Deregister ccw device.
* Unfortunately, we cannot do this directly from the
* attribute method.
*/
spin_lock_irqsave(cdev->ccwlock, flags);
cdev->private->state = DEV_STATE_NOT_OPER;
spin_unlock_irqrestore(cdev->ccwlock, flags);
rc = device_schedule_callback(&cdev->dev,
ccw_device_remove_orphan_cb);
if (rc)
dev_info(&cdev->dev, "Couldn't unregister orphan\n");
return;
}
/* Deregister subchannel, which will kill the ccw device. */
rc = device_schedule_callback(cdev->dev.parent,
ccw_device_remove_sch_cb);
if (rc)
dev_info(&cdev->dev,
"Couldn't unregister disconnected device\n");
}
int
ccw_device_set_offline(struct ccw_device *cdev)
{