s390/cio: add test for ccwgroup device
Add a test to check if a given device is a ccwgroup device.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c
index 5535312..db9c854 100644
--- a/drivers/s390/cio/ccwgroup.c
+++ b/drivers/s390/cio/ccwgroup.c
@@ -561,6 +561,12 @@ static struct bus_type ccwgroup_bus_type = {
.pm = &ccwgroup_pm_ops,
};
+bool dev_is_ccwgroup(struct device *dev)
+{
+ return dev->bus == &ccwgroup_bus_type;
+}
+EXPORT_SYMBOL(dev_is_ccwgroup);
+
/**
* ccwgroup_driver_register() - register a ccw group driver
* @cdriver: driver to be registered
