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[S390] cio: disallow online setting of device in transient state

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Return -EAGAIN on writes to sysfs online attribute if the corresponding
ccw device is in transient state.

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 2009-03-31 19:16:06 +02:00 committed by Martin Schwidefsky
parent 47593bfa10
commit b5cd99e6b0
1 changed files with 5 additions and 1 deletions
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6
drivers/s390/cio/device.c
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@ -515,7 +515,11 @@ static ssize_t online_store (struct device *dev, struct device_attribute *attr,
int force, ret;
unsigned long i;
if (atomic_cmpxchg(&cdev->private->onoff, 0, 1) != 0)
if ((cdev->private->state != DEV_STATE_OFFLINE &&
cdev->private->state != DEV_STATE_ONLINE &&
cdev->private->state != DEV_STATE_BOXED &&
cdev->private->state != DEV_STATE_DISCONNECTED) ||
atomic_cmpxchg(&cdev->private->onoff, 0, 1) != 0)
return -EAGAIN;
if (cdev->drv && !try_module_get(cdev->drv->owner)) {