diff options
| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2009-12-07 12:51:33 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2009-12-07 12:51:32 +0100 |
| commit | 7d253b9a1aaf5192808e641659f4feb122faa536 (patch) | |
| tree | 992c7bdfef42425d7af0390cb68a8e2070fe8b82 /drivers/s390 | |
| parent | d7d12ef2befac4fed0dccaddff11338b654804df (diff) | |
[S390] cio: remove registered flag from ccw_device_private
We used to maintain a "registered" flag in our ccw_device_private
structure. This patch removes the "registered" flag and converts
all users of it to device_is_registered which has the exact same
meaning.
Note: The usage the atomic operation test_and_clear_bit is replaced
by the non-atomic if (device_is_registered()) device_del(). This
will not do harm, since we serialize calls to ccw_device_unregister
with a single-threaded workqueue.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/cio/device.c | 11 | ||||
| -rw-r--r-- | drivers/s390/cio/io_sch.h | 1 |
2 files changed, 3 insertions, 9 deletions
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c index e24b9b1d1022..f4401ede768a 100644 --- a/drivers/s390/cio/device.c +++ b/drivers/s390/cio/device.c @@ -303,7 +303,7 @@ int ccw_device_is_orphan(struct ccw_device *cdev) static void ccw_device_unregister(struct ccw_device *cdev) { - if (test_and_clear_bit(1, &cdev->private->registered)) { + if (device_is_registered(&cdev->dev)) { device_del(&cdev->dev); /* Release reference from device_initialize(). */ put_device(&cdev->dev); @@ -640,12 +640,7 @@ static int ccw_device_register(struct ccw_device *cdev) cdev->private->dev_id.devno); if (ret) return ret; - ret = device_add(dev); - if (ret) - return ret; - - set_bit(1, &cdev->private->registered); - return ret; + return device_add(dev); } static int match_dev_id(struct device *dev, void *data) @@ -669,7 +664,7 @@ static void ccw_device_do_unbind_bind(struct ccw_device *cdev) { int ret; - if (test_bit(1, &cdev->private->registered)) { + if (device_is_registered(&cdev->dev)) { device_release_driver(&cdev->dev); ret = device_attach(&cdev->dev); WARN_ON(ret == -ENODEV); diff --git a/drivers/s390/cio/io_sch.h b/drivers/s390/cio/io_sch.h index 0559479073cc..ca1063d6b505 100644 --- a/drivers/s390/cio/io_sch.h +++ b/drivers/s390/cio/io_sch.h @@ -145,7 +145,6 @@ struct ccw_device_private { struct subchannel *sch; int state; /* device state */ atomic_t onoff; - unsigned long registered; struct ccw_dev_id dev_id; /* device id */ struct subchannel_id schid; /* subchannel number */ struct ccw_request req; /* internal I/O request */ |