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path: root/drivers/s390/block/dasd.c
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Diffstat (limited to 'drivers/s390/block/dasd.c')
-rw-r--r--drivers/s390/block/dasd.c24
1 files changed, 13 insertions, 11 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index d440319a7945..833cfab7d877 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -676,18 +676,20 @@ static void dasd_profile_start(struct dasd_block *block,
* we count each request only once.
*/
device = cqr->startdev;
- if (device->profile.data) {
- counter = 1; /* request is not yet queued on the start device */
- list_for_each(l, &device->ccw_queue)
- if (++counter >= 31)
- break;
- }
+ if (!device->profile.data)
+ return;
+
+ spin_lock(get_ccwdev_lock(device->cdev));
+ counter = 1; /* request is not yet queued on the start device */
+ list_for_each(l, &device->ccw_queue)
+ if (++counter >= 31)
+ break;
+ spin_unlock(get_ccwdev_lock(device->cdev));
+
spin_lock(&device->profile.lock);
- if (device->profile.data) {
- device->profile.data->dasd_io_nr_req[counter]++;
- if (rq_data_dir(req) == READ)
- device->profile.data->dasd_read_nr_req[counter]++;
- }
+ device->profile.data->dasd_io_nr_req[counter]++;
+ if (rq_data_dir(req) == READ)
+ device->profile.data->dasd_read_nr_req[counter]++;
spin_unlock(&device->profile.lock);
}