| Date | Fri, 13 Nov 2009 16:09:14 +0100 | From | Martin Schwidefsky <> | Subject | [patch 50/52] [PATCH] cio: change locking in io_subchannel_remove |
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From: Sebastian Ott <sebott@linux.vnet.ibm.com>
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> ---
drivers/s390/cio/device.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
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 16:08:23.000000000 +0100 @@ -1065,17 +1065,16 @@ 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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