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Commit 6e9a0f67 authored by Sebastian Ott's avatar Sebastian Ott Committed by Martin Schwidefsky
Browse files

[S390] cio: quiesce subchannel in io_subchannel_remove 



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: default avatarSebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 0c609fca

drivers/s390/cio/device.c

+9 −1
Original line number Diff line number Diff line
@@ -1059,6 +1059,8 @@ static int io_subchannel_probe(struct subchannel *sch) 
	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 @@ static void io_subchannel_shutdown(struct subchannel *sch) 
	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)