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ide: ensure that we re-run the queue handler 

The conversion to blk_delay_queue() missed parts of IDE.
Add a blk_delay_queue() to ensure that the request handler
gets reinvoked when it needs to.

Note that in all but one place the old plug re-run delay of
3 msecs is used, even though it probably could be shorter
for performance reasons in some of those cases.

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This commit is contained in:
Jens Axboe 2011-03-26 19:49:54 +01:00
parent 40471856f2
commit 9ced0b95b3
1 changed files with 11 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/ide/ide-io.c
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@ -440,6 +440,7 @@ void do_ide_request(struct request_queue *q)
struct ide_host *host = hwif->host;
struct request *rq = NULL;
ide_startstop_t startstop;
unsigned long queue_run_ms = 3; /* old plug delay */
spin_unlock_irq(q->queue_lock);
@ -459,6 +460,9 @@ repeat:
prev_port = hwif->host->cur_port;
if (drive->dev_flags & IDE_DFLAG_SLEEPING &&
time_after(drive->sleep, jiffies)) {
unsigned long left = jiffies - drive->sleep;
queue_run_ms = jiffies_to_msecs(left + 1);
ide_unlock_port(hwif);
goto plug_device;
}
@ -547,8 +551,10 @@ plug_device:
plug_device_2:
spin_lock_irq(q->queue_lock);
if (rq)
if (rq) {
blk_requeue_request(q, rq);
blk_delay_queue(q, queue_run_ms);
}
}
void ide_requeue_and_plug(ide_drive_t *drive, struct request *rq)
@ -562,6 +568,10 @@ void ide_requeue_and_plug(ide_drive_t *drive, struct request *rq)
blk_requeue_request(q, rq);
spin_unlock_irqrestore(q->queue_lock, flags);
/* Use 3ms as that was the old plug delay */
if (rq)
blk_delay_queue(q, 3);
}
static int drive_is_ready(ide_drive_t *drive)