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-rw-r--r--drivers/ide/ide-io.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index 9e9cf1407311..5275cbb1afe9 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -1101,6 +1101,7 @@ static void ide_do_request (ide_hwgroup_t *hwgroup, int masked_irq)
ide_hwif_t *hwif;
struct request *rq;
ide_startstop_t startstop;
+ int loops = 0;
/* for atari only: POSSIBLY BROKEN HERE(?) */
ide_get_lock(ide_intr, hwgroup);
@@ -1153,6 +1154,7 @@ static void ide_do_request (ide_hwgroup_t *hwgroup, int masked_irq)
/* no more work for this hwgroup (for now) */
return;
}
+ again:
hwif = HWIF(drive);
if (hwgroup->hwif->sharing_irq &&
hwif != hwgroup->hwif &&
@@ -1192,8 +1194,14 @@ static void ide_do_request (ide_hwgroup_t *hwgroup, int masked_irq)
* 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->blocked && !blk_pm_request(rq) && !(rq->flags & REQ_PREEMPT)) {
+ 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;
break;