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s390/cio: add test for ccwgroup device

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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>
This commit is contained in:
Sebastian Ott 2017-02-15 11:45:07 +01:00 committed by Martin Schwidefsky
parent 199652309a
commit a166c368e7
2 changed files with 16 additions and 0 deletions
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10
arch/s390/include/asm/ccwgroup.h
View file

@ -73,4 +73,14 @@ extern void ccwgroup_remove_ccwdev(struct ccw_device *cdev);
#define to_ccwgroupdev(x) container_of((x), struct ccwgroup_device, dev)
#define to_ccwgroupdrv(x) container_of((x), struct ccwgroup_driver, driver)
#if IS_ENABLED(CONFIG_CCWGROUP)
bool dev_is_ccwgroup(struct device *dev);
#else /* CONFIG_CCWGROUP */
static inline bool dev_is_ccwgroup(struct device *dev)
{
return false;
}
#endif /* CONFIG_CCWGROUP */
#endif

6
drivers/s390/cio/ccwgroup.c
View file

@ -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