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| author | Cornelia Huck <cornelia.huck@de.ibm.com> | 2012-05-30 16:03:22 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-11-23 11:14:28 +0100 |
| commit | 9368dac4367cd9a61ef75a745c6e26d0dd164172 (patch) | |
| tree | f44f86bc0579f86a2d6ccf4ae00fa05fc6b3a5cf /drivers/s390 | |
| parent | 36eb2caa7bace31b7868a57f77cb148e58d1c9f9 (diff) | |
| download | lwn-9368dac4367cd9a61ef75a745c6e26d0dd164172.tar.gz lwn-9368dac4367cd9a61ef75a745c6e26d0dd164172.zip | |
s390: Add a mechanism to get the subchannel id.
This will be needed by the new virtio-ccw transport.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/cio/device_ops.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/s390/cio/device_ops.c b/drivers/s390/cio/device_ops.c index ec7fb6d3b479..2ad832f8e340 100644 --- a/drivers/s390/cio/device_ops.c +++ b/drivers/s390/cio/device_ops.c @@ -763,6 +763,18 @@ _ccw_device_get_subchannel_number(struct ccw_device *cdev) return cdev->private->schid.sch_no; } +/** + * ccw_device_get_schid - obtain a subchannel id + * @cdev: device to obtain the id for + * @schid: where to fill in the values + */ +void ccw_device_get_schid(struct ccw_device *cdev, struct subchannel_id *schid) +{ + struct subchannel *sch = to_subchannel(cdev->dev.parent); + + *schid = sch->schid; +} +EXPORT_SYMBOL_GPL(ccw_device_get_schid); MODULE_LICENSE("GPL"); EXPORT_SYMBOL(ccw_device_set_options_mask); |