Merge from Linus' tree

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;