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authorDavid S. Miller <davem@davemloft.net>2010-05-19 02:01:55 -0400
committerDavid S. Miller <davem@davemloft.net>2010-05-19 02:01:55 -0400
commit2ec8c6bb5d8f3a62a79f463525054bae1e3d4487 (patch)
treefa7f8400ac685fb52e96f64997c7c682fc2aa021 /drivers/s390
parent7b39f90fabcf9e2af0cd79d0a60440d821e22b56 (diff)
parent537b60d17894b7c19a6060feae40299d7109d6e7 (diff)
Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
Conflicts: include/linux/mod_devicetable.h scripts/mod/file2alias.c
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/block/dasd.c17
1 files changed, 10 insertions, 7 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index acf222f91f5a..fa2339cb1681 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -37,6 +37,9 @@
37 */ 37 */
38#define DASD_CHANQ_MAX_SIZE 4 38#define DASD_CHANQ_MAX_SIZE 4
39 39
40#define DASD_SLEEPON_START_TAG (void *) 1
41#define DASD_SLEEPON_END_TAG (void *) 2
42
40/* 43/*
41 * SECTION: exported variables of dasd.c 44 * SECTION: exported variables of dasd.c
42 */ 45 */
@@ -1472,7 +1475,10 @@ void dasd_add_request_tail(struct dasd_ccw_req *cqr)
1472 */ 1475 */
1473static void dasd_wakeup_cb(struct dasd_ccw_req *cqr, void *data) 1476static void dasd_wakeup_cb(struct dasd_ccw_req *cqr, void *data)
1474{ 1477{
1475 wake_up((wait_queue_head_t *) data); 1478 spin_lock_irq(get_ccwdev_lock(cqr->startdev->cdev));
1479 cqr->callback_data = DASD_SLEEPON_END_TAG;
1480 spin_unlock_irq(get_ccwdev_lock(cqr->startdev->cdev));
1481 wake_up(&generic_waitq);
1476} 1482}
1477 1483
1478static inline int _wait_for_wakeup(struct dasd_ccw_req *cqr) 1484static inline int _wait_for_wakeup(struct dasd_ccw_req *cqr)
@@ -1482,10 +1488,7 @@ static inline int _wait_for_wakeup(struct dasd_ccw_req *cqr)
1482 1488
1483 device = cqr->startdev; 1489 device = cqr->startdev;
1484 spin_lock_irq(get_ccwdev_lock(device->cdev)); 1490 spin_lock_irq(get_ccwdev_lock(device->cdev));
1485 rc = ((cqr->status == DASD_CQR_DONE || 1491 rc = (cqr->callback_data == DASD_SLEEPON_END_TAG);
1486 cqr->status == DASD_CQR_NEED_ERP ||
1487 cqr->status == DASD_CQR_TERMINATED) &&
1488 list_empty(&cqr->devlist));
1489 spin_unlock_irq(get_ccwdev_lock(device->cdev)); 1492 spin_unlock_irq(get_ccwdev_lock(device->cdev));
1490 return rc; 1493 return rc;
1491} 1494}
@@ -1573,7 +1576,7 @@ static int _dasd_sleep_on(struct dasd_ccw_req *maincqr, int interruptible)
1573 wait_event(generic_waitq, !(device->stopped)); 1576 wait_event(generic_waitq, !(device->stopped));
1574 1577
1575 cqr->callback = dasd_wakeup_cb; 1578 cqr->callback = dasd_wakeup_cb;
1576 cqr->callback_data = (void *) &generic_waitq; 1579 cqr->callback_data = DASD_SLEEPON_START_TAG;
1577 dasd_add_request_tail(cqr); 1580 dasd_add_request_tail(cqr);
1578 if (interruptible) { 1581 if (interruptible) {
1579 rc = wait_event_interruptible( 1582 rc = wait_event_interruptible(
@@ -1652,7 +1655,7 @@ int dasd_sleep_on_immediatly(struct dasd_ccw_req *cqr)
1652 } 1655 }
1653 1656
1654 cqr->callback = dasd_wakeup_cb; 1657 cqr->callback = dasd_wakeup_cb;
1655 cqr->callback_data = (void *) &generic_waitq; 1658 cqr->callback_data = DASD_SLEEPON_START_TAG;
1656 cqr->status = DASD_CQR_QUEUED; 1659 cqr->status = DASD_CQR_QUEUED;
1657 list_add(&cqr->devlist, &device->ccw_queue); 1660 list_add(&cqr->devlist, &device->ccw_queue);
1658 1661