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| author | Frank Blaschka <frank.blaschka@de.ibm.com> | 2009-11-12 21:46:28 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-11-13 20:46:59 -0800 |
| commit | 1e1815be87e45ce512f998ab35e9554c25031f4d (patch) | |
| tree | cdea8e94953577889386289d10b750426aade29c /drivers | |
| parent | b7c2aecc0747f5c86a1959bce6a7ce8170a556b0 (diff) | |
| download | linux-1e1815be87e45ce512f998ab35e9554c25031f4d.tar.gz linux-1e1815be87e45ce512f998ab35e9554c25031f4d.tar.bz2 linux-1e1815be87e45ce512f998ab35e9554c25031f4d.zip | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/s390/net/ctcm_main.c | 5 | ||||
| -rw-r--r-- | drivers/s390/net/fsm.c | 1 | ||||
| -rw-r--r-- | drivers/s390/net/fsm.h | 2 |
3 files changed, 8 insertions, 0 deletions
diff --git a/drivers/s390/net/ctcm_main.c b/drivers/s390/net/ctcm_main.c index db054ed1a8cc..ecac3b2e32d4 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 2c1db8036b7c..cae48cbc5e96 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 af679c10f1bd..1e8b235d95b5 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); } /** |