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| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2012-05-15 17:52:07 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-05-16 14:42:46 +0200 |
| commit | b7a610f7b4cb95150ee58ea7454ca2ace10634c5 (patch) | |
| tree | bf8ea737924dc421042740e0243edac8b52313c7 /drivers/s390/cio/device.c | |
| parent | f2962dae0efd81fed06d0687f300725ab063587a (diff) | |
| download | linux-b7a610f7b4cb95150ee58ea7454ca2ace10634c5.tar.gz linux-b7a610f7b4cb95150ee58ea7454ca2ace10634c5.tar.bz2 linux-b7a610f7b4cb95150ee58ea7454ca2ace10634c5.zip | |
s390/ccwgroup: exploit ccwdev_by_dev_id
Instead of finding devices via driver_find_device use the bus_find_device
wrapper get_ccwdev_by_dev_id. This allows us to get rid of the ccw_driver
argument of ccwgroup_create_dev and thus simplify the interface.
Reviewed-by: Cornelia Huck <cornelia.huck@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/device.c')
| -rw-r--r-- | drivers/s390/cio/device.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c index 02d015259461..f8f952d52045 100644 --- a/drivers/s390/cio/device.c +++ b/drivers/s390/cio/device.c @@ -695,7 +695,17 @@ static int match_dev_id(struct device *dev, void *data) return ccw_dev_id_is_equal(&cdev->private->dev_id, dev_id); } -static struct ccw_device *get_ccwdev_by_dev_id(struct ccw_dev_id *dev_id) +/** + * get_ccwdev_by_dev_id() - obtain device from a ccw device id + * @dev_id: id of the device to be searched + * + * This function searches all devices attached to the ccw bus for a device + * matching @dev_id. + * Returns: + * If a device is found its reference count is increased and returned; + * else %NULL is returned. + */ +struct ccw_device *get_ccwdev_by_dev_id(struct ccw_dev_id *dev_id) { struct device *dev; @@ -703,6 +713,7 @@ static struct ccw_device *get_ccwdev_by_dev_id(struct ccw_dev_id *dev_id) return dev ? to_ccwdev(dev) : NULL; } +EXPORT_SYMBOL_GPL(get_ccwdev_by_dev_id); static void ccw_device_do_unbind_bind(struct ccw_device *cdev) { |