From 7d253b9a1aaf5192808e641659f4feb122faa536 Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Mon, 7 Dec 2009 12:51:33 +0100 Subject: [PATCH] [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 Signed-off-by: Martin Schwidefsky --- drivers/s390/cio/device.c | 11 +++-------- 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 e24b9b1d102..f4401ede768 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 0559479073c..ca1063d6b50 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 */ -- 2.39.3