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| author |   Sebastian Ott <sebott@linux.vnet.ibm.com> | 2012-11-22 15:56:39 +0100 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-11-23 11:14:35 +0100 |
| commit | 683c3dcef439f969b2c7fd09b60144cb4e2155a5 (patch) | |
| tree | 9c83a5059e930bc9aa81e3c96b997020e6f7713c /drivers/s390/cio/ccwgroup.c | |
| parent | s390/ccwgroup: set_online return error when already online (diff) | |
| download | linux-dev-683c3dcef439f969b2c7fd09b60144cb4e2155a5.tar.xz linux-dev-683c3dcef439f969b2c7fd09b60144cb4e2155a5.zip | |
s390/ccwgroup: allow drivers to call set_{on,off}line
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>
Diffstat (limited to 'drivers/s390/cio/ccwgroup.c')
| -rw-r--r-- | drivers/s390/cio/ccwgroup.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c index 9c8e117c7d3a..84846c2b96d3 100644 --- a/drivers/s390/cio/ccwgroup.c +++ b/drivers/s390/cio/ccwgroup.c @@ -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, |