Messages in this thread Patch in this message | | | Date | Fri, 13 Nov 2009 16:09:13 +0100 | From | Martin Schwidefsky <> | Subject | [patch 49/52] [PATCH] cio: quiesce subchannel in io_subchannel_remove |
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From: Sebastian Ott <sebott@linux.vnet.ibm.com>
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> ---
drivers/s390/cio/device.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)
Index: quilt-2.6/drivers/s390/cio/device.c =================================================================== --- quilt-2.6.orig/drivers/s390/cio/device.c 2009-11-13 16:08:22.000000000 +0100 +++ quilt-2.6/drivers/s390/cio/device.c 2009-11-13 16:08:22.000000000 +0100 @@ -1059,6 +1059,8 @@ return 0; } +static void io_subchannel_quiesce(struct subchannel *); + static int io_subchannel_remove (struct subchannel *sch) { @@ -1068,6 +1070,7 @@ 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 @@ 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 @@ 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)
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