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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2009-01-02 16:12:50 +0100
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2009-01-02 16:12:50 +0100
commit631de3708d595d153e8a510a3608689290f4c0ed (patch)
treedbecf12cccac76e89cf1908f80b4f515cada731e /drivers
parentb2cfb05a701809abee591265a198afa029d68bff (diff)
downloadop-kernel-dev-631de3708d595d153e8a510a3608689290f4c0ed.zip
op-kernel-dev-631de3708d595d153e8a510a3608689290f4c0ed.tar.gz
ide: add ide_[un]lock_hwgroup() helpers
Add ide_[un]lock_hwgroup() inline helpers for obtaining exclusive access to the given hwgroup and update the core code accordingly. [ This change besides making code saner results in more efficient use of ide_{get,release}_lock(). ] Cc: Michael Schmitz <schmitz@biophys.uni-duesseldorf.de> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Elias Oltmanns <eo@nebensachen.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/ide/ide-io.c32
-rw-r--r--drivers/ide/ide-park.c2
2 files changed, 12 insertions, 22 deletions
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index c605121..ab48004 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -790,10 +790,7 @@ void do_ide_request(struct request_queue *q)
/* caller must own hwgroup->lock */
BUG_ON(!irqs_disabled());
- while (!hwgroup->busy) {
- hwgroup->busy = 1;
- /* for atari only */
- ide_get_lock(ide_intr, hwgroup);
+ while (!ide_lock_hwgroup(hwgroup)) {
drive = choose_drive(hwgroup);
if (drive == NULL) {
int sleeping = 0;
@@ -825,17 +822,10 @@ void do_ide_request(struct request_queue *q)
hwgroup->sleeping = 1;
hwgroup->req_gen_timer = hwgroup->req_gen;
mod_timer(&hwgroup->timer, sleep);
- /* we purposely leave hwgroup->busy==1
+ /* we purposely leave hwgroup locked
* while sleeping */
- } else {
- /* Ugly, but how can we sleep for the lock
- * otherwise? perhaps from tq_disk?
- */
-
- /* for atari only */
- ide_release_lock();
- hwgroup->busy = 0;
- }
+ } else
+ ide_unlock_hwgroup(hwgroup);
/* no more work for this hwgroup (for now) */
goto plug_device;
@@ -865,7 +855,7 @@ void do_ide_request(struct request_queue *q)
*/
rq = elv_next_request(drive->queue);
if (!rq) {
- hwgroup->busy = 0;
+ ide_unlock_hwgroup(hwgroup);
break;
}
@@ -885,8 +875,8 @@ void do_ide_request(struct request_queue *q)
if ((drive->dev_flags & IDE_DFLAG_BLOCKED) &&
blk_pm_request(rq) == 0 &&
(rq->cmd_flags & REQ_PREEMPT) == 0) {
- /* We clear busy, there should be no pending ATA command at this point. */
- hwgroup->busy = 0;
+ /* there should be no pending command at this point */
+ ide_unlock_hwgroup(hwgroup);
goto plug_device;
}
@@ -897,7 +887,7 @@ void do_ide_request(struct request_queue *q)
spin_lock_irq(&hwgroup->lock);
if (startstop == ide_stopped) {
- hwgroup->busy = 0;
+ ide_unlock_hwgroup(hwgroup);
if (!elv_queue_empty(orig_drive->queue))
blk_plug_device(orig_drive->queue);
}
@@ -1001,7 +991,7 @@ void ide_timer_expiry (unsigned long data)
*/
if (hwgroup->sleeping) {
hwgroup->sleeping = 0;
- hwgroup->busy = 0;
+ ide_unlock_hwgroup(hwgroup);
}
} else {
ide_drive_t *drive = hwgroup->drive;
@@ -1056,7 +1046,7 @@ void ide_timer_expiry (unsigned long data)
spin_lock_irq(&hwgroup->lock);
enable_irq(hwif->irq);
if (startstop == ide_stopped) {
- hwgroup->busy = 0;
+ ide_unlock_hwgroup(hwgroup);
if (!elv_queue_empty(drive->queue))
blk_plug_device(drive->queue);
}
@@ -1249,7 +1239,7 @@ irqreturn_t ide_intr (int irq, void *dev_id)
drive->service_time = jiffies - drive->service_start;
if (startstop == ide_stopped) {
if (hwgroup->handler == NULL) { /* paranoia */
- hwgroup->busy = 0;
+ ide_unlock_hwgroup(hwgroup);
if (!elv_queue_empty(drive->queue))
blk_plug_device(drive->queue);
} else
diff --git a/drivers/ide/ide-park.c b/drivers/ide/ide-park.c
index 63d01c5..44c6787 100644
--- a/drivers/ide/ide-park.c
+++ b/drivers/ide/ide-park.c
@@ -22,7 +22,7 @@ static void issue_park_cmd(ide_drive_t *drive, unsigned long timeout)
if (reset_timer && hwgroup->sleeping &&
del_timer(&hwgroup->timer)) {
hwgroup->sleeping = 0;
- hwgroup->busy = 0;
+ ide_unlock_hwgroup(hwgroup);
blk_start_queueing(q);
}
spin_unlock_irq(&hwgroup->lock);
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