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[S390] dasd: wait for terminated request

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After terminating a request in the dasd_sleep_on_immediatly function,
wait for the clear interrupt to be received before starting the
new request. This prevents the requests from getting mixed up.

Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Stefan Haberland 2011-10-30 15:16:56 +01:00 committed by Martin Schwidefsky
parent 3948a10250
commit 214b8ffc20
1 changed files with 5 additions and 1 deletions
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6
drivers/s390/block/dasd.c
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@ -2261,7 +2261,11 @@ int dasd_sleep_on_immediatly(struct dasd_ccw_req *cqr)
cqr->callback = dasd_wakeup_cb;
cqr->callback_data = DASD_SLEEPON_START_TAG;
cqr->status = DASD_CQR_QUEUED;
list_add(&cqr->devlist, &device->ccw_queue);
/*
* add new request as second
* first the terminated cqr needs to be finished
*/
list_add(&cqr->devlist, device->ccw_queue.next);
/* let the bh start the request to keep them in order */
dasd_schedule_device_bh(device);