ide: add device flags

Add 'unsigned long dev_flags' to ide_drive_t and convert bitfields
to IDE_DFLAG_* flags.

While at it:
- IDE_DFLAG_ADDRESSING -> IDE_DFLAG_LBA48
- fixup some comments
- remove needless g->flags zeroing from ide*_probe()

There should be no functional changes caused by this patch.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ide-acpi.c

@@ -290,7 +290,7 @@ static int do_drive_get_GTF(ide_drive_t *drive,
 	DEBPRINT("ENTER: %s at %s, port#: %d, hard_port#: %d\n",
 		 hwif->name, dev->bus_id, port, hwif->channel);
 
-	if (!drive->present) {
+	if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) {
 		DEBPRINT("%s drive %d:%d not present\n",
 			 hwif->name, hwif->channel, port);
 		goto out;
@@ -420,8 +420,9 @@ static int do_drive_set_taskfiles(ide_drive_t *drive,
 
 	DEBPRINT("ENTER: %s, hard_port#: %d\n", drive->name, drive->dn);
 
-	if (!drive->present)
+	if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
 		goto out;
+
 	if (!gtf_count)		/* shouldn't be here */
 		goto out;
 
@@ -660,7 +661,8 @@ void ide_acpi_set_state(ide_hwif_t *hwif, int on)
 		if (!drive->acpidata->obj_handle)
 			drive->acpidata->obj_handle = ide_acpi_drive_get_handle(drive);
 
-		if (drive->acpidata->obj_handle && drive->present) {
+		if (drive->acpidata->obj_handle &&
+		    (drive->dev_flags & IDE_DFLAG_PRESENT)) {
 			acpi_bus_set_power(drive->acpidata->obj_handle,
 				on? ACPI_STATE_D0: ACPI_STATE_D3);
 		}
@@ -720,7 +722,7 @@ void ide_acpi_port_init_devices(ide_hwif_t *hwif)
 
 		memset(drive->acpidata, 0, sizeof(*drive->acpidata));
 
-		if (!drive->present)
+		if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
 			continue;
 
 		err = taskfile_lib_get_identify(drive, drive->acpidata->idbuff);
@@ -745,7 +747,7 @@ void ide_acpi_port_init_devices(ide_hwif_t *hwif)
 	for (i = 0; i < MAX_DRIVES; i++) {
 		drive = &hwif->drives[i];
 
-		if (drive->present)
+		if (drive->dev_flags & IDE_DFLAG_PRESENT)
 			/* Execute ACPI startup code */
 			ide_acpi_exec_tfs(drive);
 	}

drivers/ide/ide-atapi.c

@@ -261,7 +261,7 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
 	ide_expiry_t *expiry;
 	unsigned int timeout, temp;
 	u16 bcount;
-	u8 stat, ireason, scsi = drive->scsi, dsc = 0;
+	u8 stat, ireason, scsi = !!(drive->dev_flags & IDE_DFLAG_SCSI), dsc = 0;
 
 	debug_log("Enter %s - interrupt handler\n", __func__);
 
@@ -494,7 +494,8 @@ static ide_startstop_t ide_transfer_pc(ide_drive_t *drive)
 	}
 
 	ireason = ide_read_ireason(drive);
-	if (drive->media == ide_tape && !drive->scsi)
+	if (drive->media == ide_tape &&
+	    (drive->dev_flags & IDE_DFLAG_SCSI) == 0)
 		ireason = ide_wait_ireason(drive, ireason);
 
 	if ((ireason & ATAPI_COD) == 0 || (ireason & ATAPI_IO)) {
@@ -512,7 +513,7 @@ static ide_startstop_t ide_transfer_pc(ide_drive_t *drive)
 		timeout = drive->pc_delay;
 		expiry = &ide_delayed_transfer_pc;
 	} else {
-		if (drive->scsi) {
+		if (drive->dev_flags & IDE_DFLAG_SCSI) {
 			timeout = ide_scsi_get_timeout(pc);
 			expiry = ide_scsi_expiry;
 		} else {
@@ -544,14 +545,14 @@ ide_startstop_t ide_issue_pc(ide_drive_t *drive, unsigned int timeout,
 	struct ide_atapi_pc *pc = drive->pc;
 	ide_hwif_t *hwif = drive->hwif;
 	u16 bcount;
-	u8 dma = 0;
+	u8 dma = 0, scsi = !!(drive->dev_flags & IDE_DFLAG_SCSI);
 
 	/* We haven't transferred any data yet */
 	pc->xferred = 0;
 	pc->cur_pos = pc->buf;
 
 	/* Request to transfer the entire buffer at once */
-	if (drive->media == ide_tape && !drive->scsi)
+	if (drive->media == ide_tape && scsi == 0)
 		bcount = pc->req_xfer;
 	else
 		bcount = min(pc->req_xfer, 63 * 1024);
@@ -561,19 +562,19 @@ ide_startstop_t ide_issue_pc(ide_drive_t *drive, unsigned int timeout,
 		ide_dma_off(drive);
 	}
 
-	if ((pc->flags & PC_FLAG_DMA_OK) && drive->using_dma) {
-		if (drive->scsi)
+	if ((pc->flags & PC_FLAG_DMA_OK) &&
+	    (drive->dev_flags & IDE_DFLAG_USING_DMA)) {
+		if (scsi)
 			hwif->sg_mapped = 1;
 		dma = !hwif->dma_ops->dma_setup(drive);
-		if (drive->scsi)
+		if (scsi)
 			hwif->sg_mapped = 0;
 	}
 
 	if (!dma)
 		pc->flags &= ~PC_FLAG_DMA_OK;
 
-	ide_pktcmd_tf_load(drive, drive->scsi ? 0 : IDE_TFLAG_OUT_DEVICE,
-			   bcount, dma);
+	ide_pktcmd_tf_load(drive, scsi ? 0 : IDE_TFLAG_OUT_DEVICE, bcount, dma);
 
 	/* Issue the packet command */
 	if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {

drivers/ide/ide-cd.c

@@ -741,7 +741,7 @@ static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive)
 
 	if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) {
 		if (--retry == 0)
-			drive->dsc_overlap = 0;
+			drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;
 	}
 	return ide_stopped;
 }
@@ -1129,7 +1129,7 @@ static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
 		}
 		cd->dma = 0;
 	} else
-		cd->dma = drive->using_dma;
+		cd->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 
 	if (write)
 		cd->devinfo.media_written = 1;
@@ -1166,7 +1166,7 @@ static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
 		else
 			buf = rq->data;
 
-		info->dma = drive->using_dma;
+		info->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 
 		/*
 		 * check if dma is safe
@@ -1211,7 +1211,7 @@ static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
 		if (rq_data_dir(rq) == READ &&
 		    IDE_LARGE_SEEK(info->last_block, block,
 			    IDECD_SEEK_THRESHOLD) &&
-		    drive->dsc_overlap) {
+		    (drive->dev_flags & IDE_DFLAG_DSC_OVERLAP)) {
 			xferlen = 0;
 			fn = cdrom_start_seek_continuation;
 
@@ -1804,7 +1804,7 @@ static ide_proc_entry_t idecd_proc[] = {
 	{ NULL, 0, NULL, NULL }
 };
 
-ide_devset_rw_field(dsc_overlap, dsc_overlap);
+ide_devset_rw_flag(dsc_overlap, IDE_DFLAG_DSC_OVERLAP);
 
 static const struct ide_proc_devset idecd_settings[] = {
 	IDE_PROC_DEVSET(dsc_overlap, 0, 1),
@@ -1910,7 +1910,10 @@ static int ide_cdrom_setup(ide_drive_t *drive)
 	/* set correct block size */
 	blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
 
-	drive->dsc_overlap = (drive->next != drive);
+	if (drive->next != drive)
+		drive->dev_flags |= IDE_DFLAG_DSC_OVERLAP;
+	else
+		drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;
 
 	if (ide_cdrom_register(drive, nslots)) {
 		printk(KERN_ERR "%s: %s failed to register device with the"
@@ -1944,7 +1947,7 @@ static void ide_cd_release(struct kref *kref)
 	kfree(info->toc);
 	if (devinfo->handle == drive)
 		unregister_cdrom(devinfo);
-	drive->dsc_overlap = 0;
+	drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;
 	drive->driver_data = NULL;
 	blk_queue_prep_rq(drive->queue, NULL);
 	g->private_data = NULL;