Commit 7a8ad100 authored by Sebastian Ott's avatar Sebastian Ott Committed by Martin Schwidefsky
Browse files

[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: default avatarSebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 6e9a0f67
......@@ -1065,17 +1065,16 @@ static int
io_subchannel_remove (struct subchannel *sch)
{
struct ccw_device *cdev;
unsigned long flags;
cdev = sch_get_cdev(sch);
if (!cdev)
goto out_free;
io_subchannel_quiesce(sch);
/* 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);
cdev->private->state = DEV_STATE_NOT_OPER;
spin_unlock_irqrestore(cdev->ccwlock, flags);
spin_unlock_irq(cdev->ccwlock);
ccw_device_unregister(cdev);
out_free:
kfree(sch->private);
......
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