Messages in this thread Patch in this message |  | | | Date | Fri, 13 Nov 2009 16:09:08 +0100 | | From | Martin Schwidefsky <> | | Subject | [patch 44/52] [PATCH] cio: remove registered flag from ccw_device_private |
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From: Sebastian Ott <sebott@linux.vnet.ibm.com>
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> --- drivers/s390/cio/device.c | 11 +++-------- drivers/s390/cio/io_sch.h | 1 - 2 files changed, 3 insertions(+), 9 deletions(-) Index: quilt-2.6/drivers/s390/cio/device.c =================================================================== --- quilt-2.6.orig/drivers/s390/cio/device.c 2009-11-13 16:08:20.000000000 +0100 +++ quilt-2.6/drivers/s390/cio/device.c 2009-11-13 16:08:21.000000000 +0100 @@ -303,7 +303,7 @@ 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 @@ 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 @@ { 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); Index: quilt-2.6/drivers/s390/cio/io_sch.h =================================================================== --- quilt-2.6.orig/drivers/s390/cio/io_sch.h 2009-11-13 16:08:21.000000000 +0100 +++ quilt-2.6/drivers/s390/cio/io_sch.h 2009-11-13 16:08:21.000000000 +0100 @@ -145,7 +145,6 @@ 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 */
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