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s390/ccwgroup: allow drivers to call set_{on,off}line

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Allow drivers to enable/disable ccwgroup devices.

Acked-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
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 2012-11-22 15:56:39 +01:00 committed by Martin Schwidefsky
parent cff971026d
commit 683c3dcef4
2 changed files with 23 additions and 2 deletions
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3
arch/s390/include/asm/ccwgroup.h
View File

@ -59,6 +59,9 @@ extern void ccwgroup_driver_unregister (struct ccwgroup_driver *cdriver);
int ccwgroup_create_dev(struct device *root, struct ccwgroup_driver *gdrv,
int num_devices, const char *buf);
extern int ccwgroup_set_online(struct ccwgroup_device *gdev);
extern int ccwgroup_set_offline(struct ccwgroup_device *gdev);
extern int ccwgroup_probe_ccwdev(struct ccw_device *cdev);
extern void ccwgroup_remove_ccwdev(struct ccw_device *cdev);

22
drivers/s390/cio/ccwgroup.c
View File

@ -65,7 +65,15 @@ static void __ccwgroup_remove_cdev_refs(struct ccwgroup_device *gdev)
}
}
static int ccwgroup_set_online(struct ccwgroup_device *gdev)
/**
* ccwgroup_set_online() - enable a ccwgroup device
* @gdev: target ccwgroup device
*
* This function attempts to put the ccwgroup device into the online state.
* Returns:
* %0 on success and a negative error value on failure.
*/
int ccwgroup_set_online(struct ccwgroup_device *gdev)
{
struct ccwgroup_driver *gdrv = to_ccwgroupdrv(gdev->dev.driver);
int ret = -EINVAL;
@ -84,8 +92,17 @@ out:
atomic_set(&gdev->onoff, 0);
return ret;
}
EXPORT_SYMBOL(ccwgroup_set_online);
static int ccwgroup_set_offline(struct ccwgroup_device *gdev)
/**
* ccwgroup_set_offline() - disable a ccwgroup device
* @gdev: target ccwgroup device
*
* This function attempts to put the ccwgroup device into the offline state.
* Returns:
* %0 on success and a negative error value on failure.
*/
int ccwgroup_set_offline(struct ccwgroup_device *gdev)
{
struct ccwgroup_driver *gdrv = to_ccwgroupdrv(gdev->dev.driver);
int ret = -EINVAL;
@ -104,6 +121,7 @@ out:
atomic_set(&gdev->onoff, 0);
return ret;
}
EXPORT_SYMBOL(ccwgroup_set_offline);
static ssize_t ccwgroup_online_store(struct device *dev,
struct device_attribute *attr,