diff options
| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2009-09-22 22:58:35 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2009-09-22 22:58:41 +0200 |
| commit | 8ea7f5590142c0b9ab319aa3cae85cf430a207d8 (patch) | |
| tree | a23b12fbfe51077cc8df6694f4ab7225462b657d /drivers/s390/cio/device.c | |
| parent | 255305536c1b56ad09590f1400fb2c788265e34e (diff) | |
[S390] cio: introduce css_settle
Introduce the css_driver callback settle which can be implemented
by a subchannel driver to wait for the subchannel type specific
asynchronous work to finish.
In channel_subsystem_init_sync we call that for each subchannel
driver.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/device.c')
| -rw-r--r-- | drivers/s390/cio/device.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c index 4093adc12f2c..f780bdd3a04e 100644 --- a/drivers/s390/cio/device.c +++ b/drivers/s390/cio/device.c @@ -131,6 +131,10 @@ static void io_subchannel_shutdown(struct subchannel *); static int io_subchannel_sch_event(struct subchannel *, int); static int io_subchannel_chp_event(struct subchannel *, struct chp_link *, int); +static void recovery_func(unsigned long data); +struct workqueue_struct *ccw_device_work; +wait_queue_head_t ccw_device_init_wq; +atomic_t ccw_device_init_count; static struct css_device_id io_subchannel_ids[] = { { .match_flags = 0x1, .type = SUBCHANNEL_TYPE_IO, }, @@ -151,6 +155,13 @@ static int io_subchannel_prepare(struct subchannel *sch) return 0; } +static void io_subchannel_settle(void) +{ + wait_event(ccw_device_init_wq, + atomic_read(&ccw_device_init_count) == 0); + flush_workqueue(ccw_device_work); +} + static struct css_driver io_subchannel_driver = { .owner = THIS_MODULE, .subchannel_type = io_subchannel_ids, @@ -162,14 +173,9 @@ static struct css_driver io_subchannel_driver = { .remove = io_subchannel_remove, .shutdown = io_subchannel_shutdown, .prepare = io_subchannel_prepare, + .settle = io_subchannel_settle, }; -struct workqueue_struct *ccw_device_work; -wait_queue_head_t ccw_device_init_wq; -atomic_t ccw_device_init_count; - -static void recovery_func(unsigned long data); - int __init io_subchannel_init(void) { int ret; |