diff options
Diffstat (limited to 'drivers/ide/ide-io.c')
| -rw-r--r-- | drivers/ide/ide-io.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c index 32eaa3f8051..e2eb408a8a1 100644 --- a/drivers/ide/ide-io.c +++ b/drivers/ide/ide-io.c @@ -800,7 +800,20 @@ static ide_startstop_t do_special (ide_drive_t *drive) s->b.set_tune = 0; if (set_pio_mode_abuse(drive->hwif, req_pio)) { - if (hwif->set_pio_mode) + + if (hwif->set_pio_mode == NULL) + return ide_stopped; + + /* + * take ide_lock for drive->[no_]unmask/[no_]io_32bit + */ + if (req_pio == 8 || req_pio == 9) { + unsigned long flags; + + spin_lock_irqsave(&ide_lock, flags); + hwif->set_pio_mode(drive, req_pio); + spin_unlock_irqrestore(&ide_lock, flags); + } else hwif->set_pio_mode(drive, req_pio); } else { int keep_dma = drive->using_dma; |