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authorCornelia Huck <cornelia.huck@de.ibm.com>2012-05-30 16:03:22 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2012-11-23 11:14:28 +0100
commit9368dac4367cd9a61ef75a745c6e26d0dd164172 (patch)
treef44f86bc0579f86a2d6ccf4ae00fa05fc6b3a5cf /drivers/s390/cio
parent36eb2caa7bace31b7868a57f77cb148e58d1c9f9 (diff)
downloadvexpress-lsk-9368dac4367cd9a61ef75a745c6e26d0dd164172.tar.gz
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/cio')
-rw-r--r--drivers/s390/cio/device_ops.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/s390/cio/device_ops.c b/drivers/s390/cio/device_ops.c
index ec7fb6d3b47..2ad832f8e34 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);