[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>
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 868f8c6..e47aa3f 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -515,7 +515,11 @@
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)) {