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[S390] dasd: prevent validate server for offline devices

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Calling validate server on devices in offline processing may cause
an OOPS in the dasd_sleep_on function.

Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Reviewed-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Stefan Haberland 2012-03-11 11:59:37 -04:00 committed by Martin Schwidefsky
parent 35424f636e
commit 25e2cf1c1a
2 changed files with 12 additions and 0 deletions
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4
drivers/s390/block/dasd.c
View file

@ -640,6 +640,10 @@ void dasd_enable_device(struct dasd_device *device)
dasd_set_target_state(device, DASD_STATE_NEW);
/* Now wait for the devices to come up. */
wait_event(dasd_init_waitq, _wait_for_device(device));
dasd_reload_device(device);
if (device->discipline->kick_validate)
device->discipline->kick_validate(device);
}
/*

8
drivers/s390/block/dasd_eckd.c
View file

@ -1564,6 +1564,12 @@ static void dasd_eckd_do_validate_server(struct work_struct *work)
static void dasd_eckd_kick_validate_server(struct dasd_device *device)
{
dasd_get_device(device);
/* exit if device not online or in offline processing */
if (test_bit(DASD_FLAG_OFFLINE, &device->flags) ||
device->state < DASD_STATE_ONLINE) {
dasd_put_device(device);
return;
}
/* queue call to do_validate_server to the kernel event daemon. */
schedule_work(&device->kick_validate);
}
@ -1993,6 +1999,7 @@ static int dasd_eckd_ready_to_online(struct dasd_device *device)
static int dasd_eckd_online_to_ready(struct dasd_device *device)
{
cancel_work_sync(&device->reload_device);
cancel_work_sync(&device->kick_validate);
return dasd_alias_remove_device(device);
};
@ -2263,6 +2270,7 @@ static void dasd_eckd_check_for_device_change(struct dasd_device *device,
* and only if not suspended
*/
if (!device->block && private->lcu &&
device->state == DASD_STATE_ONLINE &&
!test_bit(DASD_FLAG_OFFLINE, &device->flags) &&
!test_bit(DASD_FLAG_SUSPENDED, &device->flags)) {
/*