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s390/cio/chp: cleanup attribute usage 

Let the driver core handle device attribute creation and removal. This
will simplify the code and eliminates races between attribute
availability and userspace notification via uevents.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2012-06-04 19:29:41 +02:00 committed by Martin Schwidefsky
parent eb546195a7
commit ed35ba9af4
1 changed files with 5 additions and 7 deletions
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12
drivers/s390/cio/chp.c
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@ -362,10 +362,13 @@ static struct attribute *chp_attrs[] = {
&dev_attr_shared.attr,
NULL,
};
static struct attribute_group chp_attr_group = {
.attrs = chp_attrs,
};
static const struct attribute_group *chp_attr_groups[] = {
&chp_attr_group,
NULL,
};
static void chp_release(struct device *dev)
{
@ -397,6 +400,7 @@ int chp_new(struct chp_id chpid)
chp->chpid = chpid;
chp->state = 1;
chp->dev.parent = &channel_subsystems[chpid.cssid]->device;
chp->dev.groups = chp_attr_groups;
chp->dev.release = chp_release;
mutex_init(&chp->lock);
@ -426,16 +430,10 @@ int chp_new(struct chp_id chpid)
put_device(&chp->dev);
goto out;
}
ret = sysfs_create_group(&chp->dev.kobj, &chp_attr_group);
if (ret) {
device_unregister(&chp->dev);
goto out;
}
mutex_lock(&channel_subsystems[chpid.cssid]->mutex);
if (channel_subsystems[chpid.cssid]->cm_enabled) {
ret = chp_add_cmg_attr(chp);
if (ret) {
sysfs_remove_group(&chp->dev.kobj, &chp_attr_group);
device_unregister(&chp->dev);
mutex_unlock(&channel_subsystems[chpid.cssid]->mutex);
goto out;