From: Frank Blaschka <frank.blaschka@xxxxxxxxxx>
State transition to DEV_STATE_STOPPED indicates all outstanding I/O has
finished. Add wait queue to wait for this state.
Signed-off-by: Frank Blaschka <frank.blaschka@xxxxxxxxxx>
Signed-off-by: Ursula Braun <ursula.braun@xxxxxxxxxx>
---
drivers/s390/net/ctcm_main.c | 5 +++++
drivers/s390/net/fsm.c | 1 +
drivers/s390/net/fsm.h | 2 ++
3 files changed, 8 insertions(+)
diff -urpN linux-2.6/drivers/s390/net/ctcm_main.c linux-2.6-patched/drivers/s390/net/ctcm_main.c
--- linux-2.6/drivers/s390/net/ctcm_main.c 2009-11-12 14:59:32.000000000 +0100
+++ linux-2.6-patched/drivers/s390/net/ctcm_main.c 2009-11-12 14:59:32.000000000 +0100
@@ -1720,6 +1720,11 @@ static int ctcm_pm_suspend(struct ccwgro
return 0;
netif_device_detach(priv->channel[READ]->netdev);
ctcm_close(priv->channel[READ]->netdev);
+ if (!wait_event_timeout(priv->fsm->wait_q,
+ fsm_getstate(priv->fsm) == DEV_STATE_STOPPED, CTCM_TIME_5_SEC)) {
+ netif_device_attach(priv->channel[READ]->netdev);
+ return -EBUSY;
+ }
ccw_device_set_offline(gdev->cdev[1]);
ccw_device_set_offline(gdev->cdev[0]);
return 0;
diff -urpN linux-2.6/drivers/s390/net/fsm.c linux-2.6-patched/drivers/s390/net/fsm.c
--- linux-2.6/drivers/s390/net/fsm.c 2009-09-10 00:13:59.000000000 +0200
+++ linux-2.6-patched/drivers/s390/net/fsm.c 2009-11-12 14:59:32.000000000 +0100
@@ -27,6 +27,7 @@ init_fsm(char *name, const char **state_
return NULL;
}
strlcpy(this->name, name, sizeof(this->name));
+ init_waitqueue_head(&this->wait_q);
f = kzalloc(sizeof(fsm), order);
if (f == NULL) {
diff -urpN linux-2.6/drivers/s390/net/fsm.h linux-2.6-patched/drivers/s390/net/fsm.h
--- linux-2.6/drivers/s390/net/fsm.h 2009-09-10 00:13:59.000000000 +0200
+++ linux-2.6-patched/drivers/s390/net/fsm.h 2009-11-12 14:59:32.000000000 +0100
@@ -66,6 +66,7 @@ typedef struct fsm_instance_t {
char name[16];
void *userdata;
int userint;
+ wait_queue_head_t wait_q;
#if FSM_DEBUG_HISTORY
int history_index;
int history_size;
@@ -197,6 +198,7 @@ fsm_newstate(fsm_instance *fi, int newst
printk(KERN_DEBUG "fsm(%s): New state %s\n", fi->name,
fi->f->state_names[newstate]);
#endif
+ wake_up(&fi->wait_q);
}
/**
--
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