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[S390] cio: Clean up online_store. 

Detangle the online_store code and make it more readable.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Cornelia Huck 2007-04-27 16:01:30 +02:00 committed by Martin Schwidefsky
parent c9182e0f42
commit f5ba6c8636
1 changed files with 62 additions and 47 deletions
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109
drivers/s390/cio/device.c
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@ -413,11 +413,60 @@ ccw_device_set_online(struct ccw_device *cdev)
return (ret == 0) ? -ENODEV : ret;
}
static ssize_t
online_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
static void online_store_handle_offline(struct ccw_device *cdev)
{
if (cdev->private->state == DEV_STATE_DISCONNECTED)
ccw_device_remove_disconnected(cdev);
else if (cdev->drv && cdev->drv->set_offline)
ccw_device_set_offline(cdev);
}
static int online_store_recog_and_online(struct ccw_device *cdev)
{
int ret;
/* Do device recognition, if needed. */
if (cdev->id.cu_type == 0) {
ret = ccw_device_recognition(cdev);
if (ret) {
printk(KERN_WARNING"Couldn't start recognition "
"for device %s (ret=%d)\n",
cdev->dev.bus_id, ret);
return ret;
}
wait_event(cdev->private->wait_q,
cdev->private->flags.recog_done);
}
if (cdev->drv && cdev->drv->set_online)
ccw_device_set_online(cdev);
return 0;
}
static void online_store_handle_online(struct ccw_device *cdev, int force)
{
int ret;
ret = online_store_recog_and_online(cdev);
if (ret)
return;
if (force && cdev->private->state == DEV_STATE_BOXED) {
ret = ccw_device_stlck(cdev);
if (ret) {
printk(KERN_WARNING"ccw_device_stlck for device %s "
"returned %d!\n", cdev->dev.bus_id, ret);
return;
}
if (cdev->id.cu_type == 0)
cdev->private->state = DEV_STATE_NOT_OPER;
online_store_recog_and_online(cdev);
}
}
static ssize_t online_store (struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct ccw_device *cdev = to_ccwdev(dev);
int i, force, ret;
int i, force;
char *tmp;
if (atomic_cmpxchg(&cdev->private->onoff, 0, 1) != 0)
@ -434,51 +483,17 @@ online_store (struct device *dev, struct device_attribute *attr, const char *buf
force = 0;
i = simple_strtoul(buf, &tmp, 16);
}
if (i == 1) {
/* Do device recognition, if needed. */
if (cdev->id.cu_type == 0) {
ret = ccw_device_recognition(cdev);
if (ret) {
printk(KERN_WARNING"Couldn't start recognition "
"for device %s (ret=%d)\n",
cdev->dev.bus_id, ret);
goto out;
}
wait_event(cdev->private->wait_q,
cdev->private->flags.recog_done);
}
if (cdev->drv && cdev->drv->set_online)
ccw_device_set_online(cdev);
} else if (i == 0) {
if (cdev->private->state == DEV_STATE_DISCONNECTED)
ccw_device_remove_disconnected(cdev);
else if (cdev->drv && cdev->drv->set_offline)
ccw_device_set_offline(cdev);
switch (i) {
case 0:
online_store_handle_offline(cdev);
break;
case 1:
online_store_handle_online(cdev, force);
break;
default:
count = -EINVAL;
}
if (force && cdev->private->state == DEV_STATE_BOXED) {
ret = ccw_device_stlck(cdev);
if (ret) {
printk(KERN_WARNING"ccw_device_stlck for device %s "
"returned %d!\n", cdev->dev.bus_id, ret);
goto out;
}
/* Do device recognition, if needed. */
if (cdev->id.cu_type == 0) {
cdev->private->state = DEV_STATE_NOT_OPER;
ret = ccw_device_recognition(cdev);
if (ret) {
printk(KERN_WARNING"Couldn't start recognition "
"for device %s (ret=%d)\n",
cdev->dev.bus_id, ret);
goto out;
}
wait_event(cdev->private->wait_q,
cdev->private->flags.recog_done);
}
if (cdev->drv && cdev->drv->set_online)
ccw_device_set_online(cdev);
}
out:
if (cdev->drv)
module_put(cdev->drv->owner);
atomic_set(&cdev->private->onoff, 0);