[S390] cio: wake up on failed recognition
Wake up even on failed device recognition, since this may be triggered
from a user trying to force a device online. With this patch a write
to the online sysfs attribute will not block for ever but return with
-EAGAIN in this case.
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 c4d2f667..9f016fe 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -482,17 +482,21 @@
}
wait_event(cdev->private->wait_q,
cdev->private->flags.recog_done);
+ if (cdev->private->state != DEV_STATE_OFFLINE)
+ /* recognition failed */
+ return -EAGAIN;
}
if (cdev->drv && cdev->drv->set_online)
ccw_device_set_online(cdev);
return 0;
}
+
static int online_store_handle_online(struct ccw_device *cdev, int force)
{
int ret;
ret = online_store_recog_and_online(cdev);
- if (ret)
+ if (ret && !force)
return ret;
if (force && cdev->private->state == DEV_STATE_BOXED) {
ret = ccw_device_stlck(cdev);
@@ -500,7 +504,9 @@
return ret;
if (cdev->id.cu_type == 0)
cdev->private->state = DEV_STATE_NOT_OPER;
- online_store_recog_and_online(cdev);
+ ret = online_store_recog_and_online(cdev);
+ if (ret)
+ return ret;
}
return 0;
}
diff --git a/drivers/s390/cio/device_fsm.c b/drivers/s390/cio/device_fsm.c
index 87b4bfc..ccd72f9 100644
--- a/drivers/s390/cio/device_fsm.c
+++ b/drivers/s390/cio/device_fsm.c
@@ -260,6 +260,7 @@
if (state == DEV_STATE_NOT_OPER) {
cdev->private->flags.recog_done = 1;
cdev->private->state = DEV_STATE_DISCONNECTED;
+ wake_up(&cdev->private->wait_q);
return;
}
/* Boxed devices don't need extra treatment. */
@@ -311,8 +312,7 @@
}
cdev->private->state = state;
io_subchannel_recog_done(cdev);
- if (state != DEV_STATE_NOT_OPER)
- wake_up(&cdev->private->wait_q);
+ wake_up(&cdev->private->wait_q);
}
/*
