From 8f6205cd572fece673da0255d74843680f67f879 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Fri, 8 May 2009 11:53:59 +0900 Subject: ide: dequeue in-flight request ide generally has single request in flight and tracks it using hwif->rq and all state handlers follow the following convention. * ide_started is returned if the request is in flight. * ide_stopped is returned if the queue needs to be restarted. The request might or might not have been processed fully or partially. * hwif->rq is set to NULL, when an issued request completes. So, dequeueing model can be implemented by dequeueing after fetch, requeueing if hwif->rq isn't NULL on ide_stopped return and doing about the same thing on completion / port unlock paths. These changes can be made in ide-io proper. In addition to the above main changes, the following updates are necessary. * ide-cd shouldn't dequeue a request when issuing REQUEST SENSE for it as the request is already dequeued. * ide-atapi uses request queue as stack when issuing REQUEST SENSE to put the REQUEST SENSE in front of the failed request. This now needs to be done using requeueing. [ Impact: dequeue in-flight request ] Signed-off-by: Tejun Heo Cc: Bartlomiej Zolnierkiewicz Cc: Borislav Petkov Cc: Sergei Shtylyov Signed-off-by: Jens Axboe --- drivers/ide/ide-cd.c | 8 -------- 1 file changed, 8 deletions(-) (limited to 'drivers/ide/ide-cd.c') diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c index 2eadc9d2e96..4c7792fd5f9 100644 --- a/drivers/ide/ide-cd.c +++ b/drivers/ide/ide-cd.c @@ -405,15 +405,7 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat) end_request: if (stat & ATA_ERR) { - struct request_queue *q = drive->queue; - unsigned long flags; - - spin_lock_irqsave(q->queue_lock, flags); - blkdev_dequeue_request(rq); - spin_unlock_irqrestore(q->queue_lock, flags); - hwif->rq = NULL; - return ide_queue_sense_rq(drive, rq) ? 2 : 1; } else return 2; -- cgit v1.2.3