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[S390] cio: change locking in io_subchannel_remove 

IO subchannels are always unregistered in process context, so use
spin_lock_irq in the corresponding remove callback.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2009-12-07 12:51:39 +01:00 committed by Martin Schwidefsky
parent 6e9a0f67de
commit 7a8ad1001c
1 changed files with 2 additions and 3 deletions
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5
drivers/s390/cio/device.c
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@ -1065,17 +1065,16 @@ static int
io_subchannel_remove (struct subchannel *sch) io_subchannel_remove (struct subchannel *sch)
{ {
struct ccw_device *cdev; struct ccw_device *cdev;
unsigned long flags;
cdev = sch_get_cdev(sch); cdev = sch_get_cdev(sch);
if (!cdev) if (!cdev)
goto out_free; goto out_free;
io_subchannel_quiesce(sch); io_subchannel_quiesce(sch);
/* Set ccw device to not operational and drop reference. */ /* Set ccw device to not operational and drop reference. */
spin_lock_irqsave(cdev->ccwlock, flags); spin_lock_irq(cdev->ccwlock);
sch_set_cdev(sch, NULL); sch_set_cdev(sch, NULL);
cdev->private->state = DEV_STATE_NOT_OPER; cdev->private->state = DEV_STATE_NOT_OPER;
spin_unlock_irqrestore(cdev->ccwlock, flags); spin_unlock_irq(cdev->ccwlock);
ccw_device_unregister(cdev); ccw_device_unregister(cdev);
out_free: out_free:
kfree(sch->private); kfree(sch->private);