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| author |   Sebastian Ott <sebott@linux.vnet.ibm.com> | 2009-03-31 19:16:06 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2009-03-31 19:17:06 +0200 |
| commit | b5cd99e6b002776c0e946f38292adbb0258b7983 (patch) | |
| tree | 5ab63d9d5ee4e325b6221107873b1c32573682b0 /drivers/s390/cio/device.c | |
| parent | [S390] cio: introduce notifier for boxed state (diff) | |
| download | linux-dev-b5cd99e6b002776c0e946f38292adbb0258b7983.tar.xz linux-dev-b5cd99e6b002776c0e946f38292adbb0258b7983.zip | |
[S390] cio: disallow online setting of device in transient state
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>
Diffstat (limited to 'drivers/s390/cio/device.c')
| -rw-r--r-- | drivers/s390/cio/device.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c index 868f8c6b053a..e47aa3f04769 100644 --- a/drivers/s390/cio/device.c +++ b/drivers/s390/cio/device.c @@ -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)) { |