ide: add IDE_HFLAG_NO_LBA48 and IDE_HFLAG_NO_LBA48_DMA host flags

Add IDE_HFLAG_NO_LBA48[_DMA] host flags, use it instead of hwif->no_lba48[_dma]
and then remove no longer needed hwif->no_lba48[_dma].  As a side-effect
this change fixes hwif->no_lba48_dma not being restored by ide_hwif_restore().

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ide-disk.c

@@ -169,7 +169,7 @@ static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
 
 	nsectors.all		= (u16) rq->nr_sectors;
 
-	if (hwif->no_lba48_dma && lba48 && dma) {
+	if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && lba48 && dma) {
 		if (block + rq->nr_sectors > 1ULL << 28)
 			dma = 0;
 		else
@@ -856,7 +856,7 @@ static int set_lba_addressing(ide_drive_t *drive, int arg)
 
 	drive->addressing =  0;
 
-	if (HWIF(drive)->no_lba48)
+	if (drive->hwif->host_flags & IDE_HFLAG_NO_LBA48)
 		return 0;
 
 	if (!idedisk_supports_lba48(drive->id))
@@ -889,6 +889,7 @@ static inline void idedisk_add_settings(ide_drive_t *drive) { ; }
 
 static void idedisk_setup (ide_drive_t *drive)
 {
+	ide_hwif_t *hwif = drive->hwif;
 	struct hd_driveid *id = drive->id;
 	unsigned long long capacity;
 
@@ -909,7 +910,6 @@ static void idedisk_setup (ide_drive_t *drive)
 	(void)set_lba_addressing(drive, 1);
 
 	if (drive->addressing == 1) {
-		ide_hwif_t *hwif = HWIF(drive);
 		int max_s = 2048;
 
 		if (max_s > hwif->rqsize)
@@ -932,7 +932,7 @@ static void idedisk_setup (ide_drive_t *drive)
 		drive->capacity64 = 1ULL << 28;
 	}
 
-	if (drive->hwif->no_lba48_dma && drive->addressing) {
+	if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && drive->addressing) {
 		if (drive->capacity64 > 1ULL << 28) {
 			printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode will"
 					 " be used for accessing sectors > %u\n",

drivers/ide/ide-probe.c

@@ -951,7 +951,8 @@ static int ide_init_queue(ide_drive_t *drive)
 	blk_queue_segment_boundary(q, 0xffff);
 
 	if (!hwif->rqsize) {
-		if (hwif->no_lba48 || hwif->no_lba48_dma)
+		if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
+		    (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA))
 			hwif->rqsize = 256;
 		else
 			hwif->rqsize = 65536;

drivers/ide/ide.c

@@ -437,7 +437,6 @@ static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
 
 	hwif->mmio			= tmp_hwif->mmio;
 	hwif->rqsize			= tmp_hwif->rqsize;
-	hwif->no_lba48			= tmp_hwif->no_lba48;
 
 #ifndef CONFIG_BLK_DEV_IDECS
 	hwif->irq			= tmp_hwif->irq;

drivers/ide/pci/alim15x3.c

@@ -665,7 +665,8 @@ static void __devinit init_hwif_common_ali15x3 (ide_hwif_t *hwif)
 	hwif->udma_filter = &ali_udma_filter;
 
 	/* don't use LBA48 DMA on ALi devices before rev 0xC5 */
-	hwif->no_lba48_dma = (m5229_revision <= 0xC4) ? 1 : 0;
+	if (m5229_revision <= 0xC4)
+		hwif->host_flags |= IDE_HFLAG_NO_LBA48_DMA;
 
 	if (!hwif->dma_base) {
 		hwif->drives[0].autotune = 1;

drivers/ide/pci/trm290.c

@@ -250,7 +250,6 @@ static void __devinit init_hwif_trm290(ide_hwif_t *hwif)
 	u8 reg = 0;
 	struct pci_dev *dev = hwif->pci_dev;
 
-	hwif->no_lba48 = 1;
 	hwif->chipset = ide_trm290;
 	cfgbase = pci_resource_start(dev, 4);
 	if ((dev->class & 5) && cfgbase) {
@@ -329,7 +328,8 @@ static ide_pci_device_t trm290_chipset __devinitdata = {
 			  IDE_HFLAG_TRUST_BIOS_FOR_DMA |
 #endif
 			  IDE_HFLAG_NO_AUTODMA |
-			  IDE_HFLAG_BOOTABLE,
+			  IDE_HFLAG_BOOTABLE |
+			  IDE_HFLAG_NO_LBA48,
 };
 
 static int __devinit trm290_init_one(struct pci_dev *dev, const struct pci_device_id *id)

include/linux/ide.h

@@ -796,8 +796,6 @@ typedef struct hwif_s {
 	unsigned	serialized : 1;	/* serialized all channel operation */
 	unsigned	sharing_irq: 1;	/* 1 = sharing irq with another hwif */
 	unsigned	reset      : 1;	/* reset after probe */
-	unsigned	no_lba48   : 1; /* 1 = cannot do LBA48 */
-	unsigned	no_lba48_dma : 1; /* 1 = cannot do LBA48 DMA */
 	unsigned	auto_poll  : 1; /* supports nop auto-poll */
 	unsigned	sg_mapped  : 1;	/* sg_table and sg_nents are ready */
 	unsigned	no_io_32bit : 1; /* 1 = can not do 32-bit IO ops */
@@ -1254,6 +1252,10 @@ enum {
 	IDE_HFLAG_NO_AUTODMA		= (1 << 15),
 	/* host is CS5510/CS5520 */
 	IDE_HFLAG_CS5520		= (1 << 16),
+	/* no LBA48 */
+	IDE_HFLAG_NO_LBA48		= (1 << 17),
+	/* no LBA48 DMA */
+	IDE_HFLAG_NO_LBA48_DMA		= (1 << 18),
 };
 
 #ifdef CONFIG_BLK_DEV_OFFBOARD