diff options
Diffstat (limited to 'drivers/ide/ide-io.c')
| -rw-r--r-- | drivers/ide/ide-io.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c index 9e9cf140731..ecfafcdafea 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; @@ -1621,12 +1629,6 @@ EXPORT_SYMBOL(ide_init_drive_cmd); * for the new rq to be completed. This is VERY DANGEROUS, and is * intended for careful use by the ATAPI tape/cdrom driver code. * - * If action is ide_next, then the rq is queued immediately after - * the currently-being-processed-request (if any), and the function - * returns without waiting for the new rq to be completed. As above, - * This is VERY DANGEROUS, and is intended for careful use by the - * ATAPI tape/cdrom driver code. - * * If action is ide_end, then the rq is queued at the end of the * request queue, and the function returns immediately without waiting * for the new rq to be completed. This is again intended for careful |