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authorStefan Haberland <stefan.haberland@de.ibm.com>2011-10-30 15:16:56 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2011-10-30 15:16:44 +0100
commit214b8ffc205bcf2ca5b04b3903be13a9257c3fbd (patch)
treea5344a72ee114692c7fd179529cc912be5ccc178 /drivers/s390/block
parent3948a102509f3bc3cc8728b2556a1ad7a4dbd7e7 (diff)
downloadop-kernel-dev-214b8ffc205bcf2ca5b04b3903be13a9257c3fbd.zip
op-kernel-dev-214b8ffc205bcf2ca5b04b3903be13a9257c3fbd.tar.gz
[S390] dasd: wait for terminated request
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>
Diffstat (limited to 'drivers/s390/block')
-rw-r--r--drivers/s390/block/dasd.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 46054c7..3b94b65 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -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);
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