From 25e2cf1c1ac52d5078cf8cc3fd2f2ad084669ddd Mon Sep 17 00:00:00 2001 From: Stefan Haberland Date: Sun, 11 Mar 2012 11:59:37 -0400 Subject: [PATCH] [S390] dasd: prevent validate server for offline devices Calling validate server on devices in offline processing may cause an OOPS in the dasd_sleep_on function. Signed-off-by: Stefan Haberland Reviewed-by: Stefan Weinhuber Signed-off-by: Martin Schwidefsky --- drivers/s390/block/dasd.c | 4 ++++ drivers/s390/block/dasd_eckd.c | 8 ++++++++ 2 files changed, 12 insertions(+) diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c index 110137e7ec81..f3509120a507 100644 --- a/drivers/s390/block/dasd.c +++ b/drivers/s390/block/dasd.c @@ -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); } /* diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c index 2617b1ed4709..c21871a4e73d 100644 --- a/drivers/s390/block/dasd_eckd.c +++ b/drivers/s390/block/dasd_eckd.c @@ -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)) { /*