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[S390] cio: fix ccw group device cleanup 

Fix ccw group device initialization: initialize device object before
using reference counting during cleanup.

Fixes the following message when group device initialization fails
(e.g. because too few devices where specified):

  kobject: '<NULL>' (..): is not initialized, yet kobject_put() is
           being called.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Peter Oberparleiter 2008-08-21 19:46:36 +02:00 committed by Martin Schwidefsky
parent 0686e402c3
commit 16f7f9564c
1 changed files with 12 additions and 8 deletions
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20
drivers/s390/cio/ccwgroup.c
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@ -112,8 +112,10 @@ ccwgroup_release (struct device *dev)
gdev = to_ccwgroupdev(dev);
for (i = 0; i < gdev->count; i++) {
dev_set_drvdata(&gdev->cdev[i]->dev, NULL);
put_device(&gdev->cdev[i]->dev);
if (gdev->cdev[i]) {
dev_set_drvdata(&gdev->cdev[i]->dev, NULL);
put_device(&gdev->cdev[i]->dev);
}
}
kfree(gdev);
}
@ -221,6 +223,13 @@ int ccwgroup_create_from_string(struct device *root, unsigned int creator_id,
atomic_set(&gdev->onoff, 0);
mutex_init(&gdev->reg_mutex);
mutex_lock(&gdev->reg_mutex);
gdev->creator_id = creator_id;
gdev->count = num_devices;
gdev->dev.bus = &ccwgroup_bus_type;
gdev->dev.parent = root;
gdev->dev.release = ccwgroup_release;
device_initialize(&gdev->dev);
curr_buf = buf;
for (i = 0; i < num_devices && curr_buf; i++) {
rc = __get_next_bus_id(&curr_buf, tmp_bus_id);
@ -258,16 +267,11 @@ int ccwgroup_create_from_string(struct device *root, unsigned int creator_id,
rc = -EINVAL;
goto error;
}
gdev->creator_id = creator_id;
gdev->count = num_devices;
gdev->dev.bus = &ccwgroup_bus_type;
gdev->dev.parent = root;
gdev->dev.release = ccwgroup_release;
snprintf (gdev->dev.bus_id, BUS_ID_SIZE, "%s",
gdev->cdev[0]->dev.bus_id);
rc = device_register(&gdev->dev);
rc = device_add(&gdev->dev);
if (rc)
goto error;
get_device(&gdev->dev);