ide-pmac: skip conservative PIO "downgrade"

We can skip conservative PIO "downgrade" (PIO3 becomes PIO2 etc.) on PMAC.

Problem reported by Mikael.

Cc Mikael Pettersson <[email protected]>

Signed-off-by Bartlomiej Zolnierkiewicz <[email protected]>

---
 drivers/ide/ppc/pmac.c |    1 +
 1 file changed, 1 insertion(+)

Index: b/drivers/ide/ppc/pmac.c
===================================================================

drivers/ide/ppc/pmac.c +1 -0

@@ -1133,6 +1133,7 @@ pmac_ide_setup_device(pmac_ide_hwif_t *p
 	hwif->drives[0].autotune = IDE_TUNE_AUTO;
 	hwif->drives[1].autotune = IDE_TUNE_AUTO;
 	hwif->host_flags = IDE_HFLAG_SET_PIO_MODE_KEEP_DMA |
+			   IDE_HFLAG_PIO_NO_DOWNGRADE |
 			   IDE_HFLAG_POST_SET_MODE;
 	hwif->pio_mask = ATA_PIO4;
 	hwif->set_pio_mode = pmac_ide_set_pio_mode;

We can skip conservative PIO "downgrade" (PIO3 becomes PIO2 etc.) on PMAC.

Problem reported by Mikael.

Signed-off-by Bartlomiej Zolnierkiewicz <[email protected]>