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Date: Wed, 08 Oct 2008 22:30:27 +0200
From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To: linux-ide@...r.kernel.org
Cc: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
linux-kernel@...r.kernel.org
Subject: [PATCH 7/7] ide: use queue lock instead of ide_lock when possible
From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Subject: [PATCH] ide: use queue lock instead of ide_lock when possible
This is just a preparation for future changes and there should be no
functional changes caused by this patch since ide_lock is currently
also used as queue lock.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
---
drivers/ide/ide-cd.c | 14 ++++++++------
drivers/ide/ide-io.c | 19 ++++++++++---------
2 files changed, 18 insertions(+), 15 deletions(-)
Index: b/drivers/ide/ide-cd.c
===================================================================
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -424,16 +424,17 @@ static int cdrom_decode_status(ide_drive
if (time_after(jiffies, info->write_timeout))
do_end_request = 1;
else {
+ struct request_queue *q = drive->queue;
unsigned long flags;
/*
* take a breather relying on the unplug
* timer to kick us again
*/
- spin_lock_irqsave(&ide_lock, flags);
- blk_plug_device(drive->queue);
- spin_unlock_irqrestore(&ide_lock,
- flags);
+ spin_lock_irqsave(q->queue_lock, flags);
+ blk_plug_device(q);
+ spin_unlock_irqrestore(q->queue_lock, flags);
+
return 1;
}
}
@@ -502,11 +503,12 @@ static int cdrom_decode_status(ide_drive
end_request:
if (stat & ATA_ERR) {
+ struct request_queue *q = drive->queue;
unsigned long flags;
- spin_lock_irqsave(&ide_lock, flags);
+ spin_lock_irqsave(q->queue_lock, flags);
blkdev_dequeue_request(rq);
- spin_unlock_irqrestore(&ide_lock, flags);
+ spin_unlock_irqrestore(q->queue_lock, flags);
hwgroup->rq = NULL;
Index: b/drivers/ide/ide-io.c
===================================================================
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -243,20 +243,21 @@ EXPORT_SYMBOL_GPL(ide_end_dequeued_reque
*/
static void ide_complete_pm_request (ide_drive_t *drive, struct request *rq)
{
+ struct request_queue *q = drive->queue;
unsigned long flags;
#ifdef DEBUG_PM
printk("%s: completing PM request, %s\n", drive->name,
blk_pm_suspend_request(rq) ? "suspend" : "resume");
#endif
- spin_lock_irqsave(&ide_lock, flags);
+ spin_lock_irqsave(q->queue_lock, flags);
if (blk_pm_suspend_request(rq)) {
- blk_stop_queue(drive->queue);
+ blk_stop_queue(q);
} else {
drive->dev_flags &= ~IDE_DFLAG_BLOCKED;
- blk_start_queue(drive->queue);
+ blk_start_queue(q);
}
- spin_unlock_irqrestore(&ide_lock, flags);
+ spin_unlock_irqrestore(q->queue_lock, flags);
drive->hwif->hwgroup->rq = NULL;
@@ -1469,16 +1470,16 @@ out:
void ide_do_drive_cmd(ide_drive_t *drive, struct request *rq)
{
ide_hwgroup_t *hwgroup = drive->hwif->hwgroup;
+ struct request_queue *q = drive->queue;
unsigned long flags;
hwgroup->rq = NULL;
- spin_lock_irqsave(&ide_lock, flags);
- __elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 1);
- __generic_unplug_device(drive->queue);
- spin_unlock_irqrestore(&ide_lock, flags);
+ spin_lock_irqsave(q->queue_lock, flags);
+ __elv_add_request(q, rq, ELEVATOR_INSERT_FRONT, 1);
+ __generic_unplug_device(q);
+ spin_unlock_irqrestore(q->queue_lock, flags);
}
-
EXPORT_SYMBOL(ide_do_drive_cmd);
void ide_pktcmd_tf_load(ide_drive_t *drive, u32 tf_flags, u16 bcount, u8 dma)
--
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