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[S390] cio: quiesce subchannel in io_subchannel_remove

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Ensure that there will be no more interrupts for an
unregistered device by using the same quiesce and disable loop
as in io_subchannel_shutdown.

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 12:51:38 +01:00 committed by Martin Schwidefsky
parent 0c609fca24
commit 6e9a0f67de
1 changed files with 9 additions and 1 deletions
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10
drivers/s390/cio/device.c
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@ -1059,6 +1059,8 @@ out_schedule:
return 0;
}
static void io_subchannel_quiesce(struct subchannel *);
static int
io_subchannel_remove (struct subchannel *sch)
{
@ -1068,6 +1070,7 @@ io_subchannel_remove (struct subchannel *sch)
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);
sch_set_cdev(sch, NULL);
@ -1150,7 +1153,7 @@ static int io_subchannel_chp_event(struct subchannel *sch,
return 0;
}
static void io_subchannel_shutdown(struct subchannel *sch)
static void io_subchannel_quiesce(struct subchannel *sch)
{
struct ccw_device *cdev;
int ret;
@ -1182,6 +1185,11 @@ out_unlock:
spin_unlock_irq(sch->lock);
}
static void io_subchannel_shutdown(struct subchannel *sch)
{
io_subchannel_quiesce(sch);
}
static int device_is_disconnected(struct ccw_device *cdev)
{
if (!cdev)