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| author | Jens Axboe <jaxboe@fusionio.com> | 2011-03-26 19:49:54 +0100 |
|---|---|---|
| committer | Jens Axboe <jaxboe@fusionio.com> | 2011-03-26 19:49:54 +0100 |
| commit | 9ced0b95b3993660e7990cf6bf68c1a80f31544e (patch) | |
| tree | d424345b88c0f2dae88beb6bbb5d153b028f824a /drivers/ide/ide-io.c | |
| parent | 40471856f2e38e9bfa8d605295e8234421110dd6 (diff) | |
| download | lwn-9ced0b95b3993660e7990cf6bf68c1a80f31544e.tar.gz lwn-9ced0b95b3993660e7990cf6bf68c1a80f31544e.zip | |
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>
Diffstat (limited to 'drivers/ide/ide-io.c')
| -rw-r--r-- | drivers/ide/ide-io.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c index f4077840d3ab..0e406d73b2c8 100644 --- a/drivers/ide/ide-io.c +++ b/drivers/ide/ide-io.c @@ -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) |