ide: remove IDE PM hack from do_ide_request()

We now tell block layer that there is still work to do using
blk_plug_device() so hack for IDE Power Management can be removed
(it was buggy for hwgroups having more than 4 devices anyway).

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index 23754bc..40327d1 100644 (file)
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -786,7 +786,6 @@ void do_ide_request(struct request_queue *q)
        ide_hwif_t      *hwif;
        struct request  *rq;
        ide_startstop_t startstop;
-       int             loops = 0;
 
        /* caller must own hwgroup->lock */
        BUG_ON(!irqs_disabled());
@@ -844,7 +843,7 @@ void do_ide_request(struct request_queue *q)
 
                if (drive != orig_drive)
                        goto plug_device;
-again:
+
                hwif = drive->hwif;
 
                if (hwif != hwgroup->hwif) {
@@ -882,16 +881,10 @@ again:
                 * though. I hope that doesn't happen too much, hopefully not
                 * unless the subdriver triggers such a thing in its own PM
                 * state machine.
-                *
-                * We count how many times we loop here to make sure we service
-                * all drives in the hwgroup without looping for ever
                 */
                if ((drive->dev_flags & IDE_DFLAG_BLOCKED) &&
                    blk_pm_request(rq) == 0 &&
                    (rq->cmd_flags & REQ_PREEMPT) == 0) {
-                       drive = drive->next ? drive->next : hwgroup->drive;
-                       if (loops++ < 4 && !blk_queue_plugged(drive->queue))
-                               goto again;
                        /* We clear busy, there should be no pending ATA command at this point. */
                        hwgroup->busy = 0;
                        goto plug_device;