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authorFrank Blaschka <frank.blaschka@de.ibm.com>2009-11-12 21:46:28 (GMT)
committerDavid S. Miller <davem@davemloft.net>2009-11-14 04:46:59 (GMT)
commit1e1815be87e45ce512f998ab35e9554c25031f4d (patch)
treecdea8e94953577889386289d10b750426aade29c
parentb7c2aecc0747f5c86a1959bce6a7ce8170a556b0 (diff)
downloadlinux-1e1815be87e45ce512f998ab35e9554c25031f4d.tar.xz
ctcm: suspend has to wait for outstanding I/O
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@de.ibm.com> Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/s390/net/ctcm_main.c5
-rw-r--r--drivers/s390/net/fsm.c1
-rw-r--r--drivers/s390/net/fsm.h2
3 files changed, 8 insertions, 0 deletions
diff --git a/drivers/s390/net/ctcm_main.c b/drivers/s390/net/ctcm_main.c
index db054ed..ecac3b2 100644
--- a/drivers/s390/net/ctcm_main.c
+++ b/drivers/s390/net/ctcm_main.c
@@ -1720,6 +1720,11 @@ static int ctcm_pm_suspend(struct ccwgroup_device *gdev)
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 --git a/drivers/s390/net/fsm.c b/drivers/s390/net/fsm.c
index 2c1db80..cae48cb 100644
--- a/drivers/s390/net/fsm.c
+++ b/drivers/s390/net/fsm.c
@@ -27,6 +27,7 @@ init_fsm(char *name, const char **state_names, const char **event_names, int nr_
return NULL;
}
strlcpy(this->name, name, sizeof(this->name));
+ init_waitqueue_head(&this->wait_q);
f = kzalloc(sizeof(fsm), order);
if (f == NULL) {
diff --git a/drivers/s390/net/fsm.h b/drivers/s390/net/fsm.h
index af679c1..1e8b235 100644
--- a/drivers/s390/net/fsm.h
+++ b/drivers/s390/net/fsm.h
@@ -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 newstate)
printk(KERN_DEBUG "fsm(%s): New state %s\n", fi->name,
fi->f->state_names[newstate]);
#endif
+ wake_up(&fi->wait_q);
}
/**