[ide] fix drive->ready_stat for ATAPI

ATAPI devices ignore DRDY bit so drive->ready_stat must be set to zero.
It is currently done by device drivers (including ide-default fake driver)
but for PMAC driver it is too late as wait_for_ready() may be called during
probe: probe_hwif()->pmac_ide_dma_check()->pmac_ide_{mdma,udma}_enable()->
->pmac_ide_do_setfeature()->wait_for_ready().

Fixup drive->ready_stat just after detecting ATAPI device.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ide-cd.c

@@ -3088,7 +3088,6 @@ int ide_cdrom_setup (ide_drive_t *drive)
 		drive->queue->unplug_delay = 1;
 
 	drive->special.all	= 0;
-	drive->ready_stat	= 0;
 
 	CDROM_STATE_FLAGS(drive)->media_changed = 1;
 	CDROM_STATE_FLAGS(drive)->toc_valid     = 0;

drivers/ide/ide-default.c

@@ -57,13 +57,6 @@ static int idedefault_attach (ide_drive_t *drive)
 			"driver with ide.c\n", drive->name);
 		return 1;
 	}
-	
-	/* For the sake of the request layer, we must make sure we have a
-	 * correct ready_stat value, that is 0 for ATAPI devices or we will
-	 * fail any request like Power Management
-	 */
-	if (drive->media != ide_disk)
-		drive->ready_stat = 0;
 
 	return 0;
 }

drivers/ide/ide-floppy.c

@@ -1793,7 +1793,6 @@ static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
 
 	*((u16 *) &gcw) = drive->id->config;
 	drive->driver_data = floppy;
-	drive->ready_stat = 0;
 	memset(floppy, 0, sizeof(idefloppy_floppy_t));
 	floppy->drive = drive;
 	floppy->pc = floppy->pc_stack;

drivers/ide/ide-probe.c

@@ -221,6 +221,8 @@ static inline void do_identify (ide_drive_t *drive, u8 cmd)
 		}
 		printk (" drive\n");
 		drive->media = type;
+		/* an ATAPI device ignores DRDY */
+		drive->ready_stat = 0;
 		return;
 	}
 

drivers/ide/ide-tape.c

@@ -4537,8 +4537,6 @@ static void idetape_setup (ide_drive_t *drive, idetape_tape_t *tape, int minor)
 	memset(tape, 0, sizeof (idetape_tape_t));
 	spin_lock_init(&tape->spinlock);
 	drive->driver_data = tape;
-	/* An ATAPI device ignores DRDY */
-	drive->ready_stat = 0;
 	drive->dsc_overlap = 1;
 #ifdef CONFIG_BLK_DEV_IDEPCI
 	if (HWIF(drive)->pci_dev != NULL) {

drivers/ide/ide.c

@@ -1751,6 +1751,8 @@ static int __init ide_setup(char *s)
 			case -4: /* "cdrom" */
 				drive->present = 1;
 				drive->media = ide_cdrom;
+				/* an ATAPI device ignores DRDY */
+				drive->ready_stat = 0;
 				hwif->noprobe = 0;
 				goto done;
 			case -5: /* "serialize" */
@@ -1777,6 +1779,7 @@ static int __init ide_setup(char *s)
 				goto done;
 			case 3: /* cyl,head,sect */
 				drive->media	= ide_disk;
+				drive->ready_stat = READY_STAT;
 				drive->cyl	= drive->bios_cyl  = vals[0];
 				drive->head	= drive->bios_head = vals[1];
 				drive->sect	= drive->bios_sect = vals[2];

drivers/scsi/ide-scsi.c

@@ -679,7 +679,6 @@ static void idescsi_add_settings(ide_drive_t *drive)
 static void idescsi_setup (ide_drive_t *drive, idescsi_scsi_t *scsi)
 {
 	DRIVER(drive)->busy++;
-	drive->ready_stat = 0;
 	if (drive->id && (drive->id->config & 0x0060) == 0x20)
 		set_bit (IDESCSI_DRQ_INTERRUPT, &scsi->flags);
 	set_bit(IDESCSI_TRANSFORM, &scsi->transform);