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authorSebastian Ott <sebott@linux.vnet.ibm.com>2009-06-16 10:30:20 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2009-06-16 10:31:08 +0200
commit823d494ac11111064cf39abd4178ce299414c771 (patch)
treeede15540ad89c3412f16c24770408a4c34cc032c /drivers/s390/cio/device_ops.c
parent03347e2592078a90df818670fddf97a33eec70fb (diff)
downloadlinux-823d494ac11111064cf39abd4178ce299414c771.tar.bz2
[S390] pm: ccw bus power management callbacks
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/device_ops.c')
-rw-r--r--drivers/s390/cio/device_ops.c26
1 files changed, 19 insertions, 7 deletions
diff --git a/drivers/s390/cio/device_ops.c b/drivers/s390/cio/device_ops.c
index bf0a24af39a0..2d0efee8a290 100644
--- a/drivers/s390/cio/device_ops.c
+++ b/drivers/s390/cio/device_ops.c
@@ -1,10 +1,8 @@
/*
- * drivers/s390/cio/device_ops.c
+ * Copyright IBM Corp. 2002, 2009
*
- * Copyright (C) 2002 IBM Deutschland Entwicklung GmbH,
- * IBM Corporation
- * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
- * Cornelia Huck (cornelia.huck@de.ibm.com)
+ * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
+ * Cornelia Huck (cornelia.huck@de.ibm.com)
*/
#include <linux/module.h>
#include <linux/init.h>
@@ -116,12 +114,15 @@ int ccw_device_clear(struct ccw_device *cdev, unsigned long intparm)
if (!cdev || !cdev->dev.parent)
return -ENODEV;
+ sch = to_subchannel(cdev->dev.parent);
+ if (!sch->schib.pmcw.ena)
+ return -EINVAL;
if (cdev->private->state == DEV_STATE_NOT_OPER)
return -ENODEV;
if (cdev->private->state != DEV_STATE_ONLINE &&
cdev->private->state != DEV_STATE_W4SENSE)
return -EINVAL;
- sch = to_subchannel(cdev->dev.parent);
+
ret = cio_clear(sch);
if (ret == 0)
cdev->private->intparm = intparm;
@@ -162,6 +163,8 @@ int ccw_device_start_key(struct ccw_device *cdev, struct ccw1 *cpa,
if (!cdev || !cdev->dev.parent)
return -ENODEV;
sch = to_subchannel(cdev->dev.parent);
+ if (!sch->schib.pmcw.ena)
+ return -EINVAL;
if (cdev->private->state == DEV_STATE_NOT_OPER)
return -ENODEV;
if (cdev->private->state == DEV_STATE_VERIFY ||
@@ -337,12 +340,15 @@ int ccw_device_halt(struct ccw_device *cdev, unsigned long intparm)
if (!cdev || !cdev->dev.parent)
return -ENODEV;
+ sch = to_subchannel(cdev->dev.parent);
+ if (!sch->schib.pmcw.ena)
+ return -EINVAL;
if (cdev->private->state == DEV_STATE_NOT_OPER)
return -ENODEV;
if (cdev->private->state != DEV_STATE_ONLINE &&
cdev->private->state != DEV_STATE_W4SENSE)
return -EINVAL;
- sch = to_subchannel(cdev->dev.parent);
+
ret = cio_halt(sch);
if (ret == 0)
cdev->private->intparm = intparm;
@@ -369,6 +375,8 @@ int ccw_device_resume(struct ccw_device *cdev)
if (!cdev || !cdev->dev.parent)
return -ENODEV;
sch = to_subchannel(cdev->dev.parent);
+ if (!sch->schib.pmcw.ena)
+ return -EINVAL;
if (cdev->private->state == DEV_STATE_NOT_OPER)
return -ENODEV;
if (cdev->private->state != DEV_STATE_ONLINE ||
@@ -580,6 +588,8 @@ int ccw_device_tm_start_key(struct ccw_device *cdev, struct tcw *tcw,
int rc;
sch = to_subchannel(cdev->dev.parent);
+ if (!sch->schib.pmcw.ena)
+ return -EINVAL;
if (cdev->private->state != DEV_STATE_ONLINE)
return -EIO;
/* Adjust requested path mask to excluded varied off paths. */
@@ -669,6 +679,8 @@ int ccw_device_tm_intrg(struct ccw_device *cdev)
{
struct subchannel *sch = to_subchannel(cdev->dev.parent);
+ if (!sch->schib.pmcw.ena)
+ return -EINVAL;
if (cdev->private->state != DEV_STATE_ONLINE)
return -EIO;
if (!scsw_is_tm(&sch->schib.scsw) ||