ide: add IDE_HFLAG_NO_ATAPI_DMA host flag

Add IDE_HFLAG_NO_ATAPI_DMA host flag and set it in host drivers which
don't support ATAPI DMA.  Then remove no longer needed hwif->atapi_dma.

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

drivers/ide/arm/icside.c

@@ -415,7 +415,6 @@ static void icside_dma_lost_irq(ide_drive_t *drive)
 
 static void icside_dma_init(ide_hwif_t *hwif)
 {
-	hwif->atapi_dma		= 1;
 	hwif->mwdma_mask	= 7; /* MW0..2 */
 	hwif->swdma_mask	= 7; /* SW0..2 */
 

drivers/ide/cris/ide-cris.c

@@ -805,6 +805,7 @@ init_e100_ide (void)
 		hwif->dma_host_on = &cris_dma_on;
 		hwif->dma_off_quietly = &cris_dma_off;
 		hwif->cbl = ATA_CBL_PATA40;
+		hwif->host_flags |= IDE_HFLAG_NO_ATAPI_DMA;
 		hwif->pio_mask = ATA_PIO4,
 		hwif->drives[0].autotune = 1;
 		hwif->drives[1].autotune = 1;

drivers/ide/ide-dma.c

@@ -338,8 +338,10 @@ static int config_drive_for_dma (ide_drive_t *drive)
 	ide_hwif_t *hwif = drive->hwif;
 	struct hd_driveid *id = drive->id;
 
-	if (drive->media != ide_disk && hwif->atapi_dma == 0)
-		return 0;
+	if (drive->media != ide_disk) {
+		if (hwif->host_flags & IDE_HFLAG_NO_ATAPI_DMA)
+			return -1;
+	}
 
 	/*
 	 * Enable DMA on any drive that has
@@ -726,8 +728,10 @@ u8 ide_find_dma_mode(ide_drive_t *drive, u8 req_mode)
 	int x, i;
 	u8 mode = 0;
 
-	if (drive->media != ide_disk && hwif->atapi_dma == 0)
-		return 0;
+	if (drive->media != ide_disk) {
+		if (hwif->host_flags & IDE_HFLAG_NO_ATAPI_DMA)
+			return 0;
+	}
 
 	for (i = 0; i < ARRAY_SIZE(xfer_mode_bases); i++) {
 		if (req_mode < xfer_mode_bases[i])

drivers/ide/ide.c

@@ -134,8 +134,6 @@ static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
 
 	hwif->bus_state	= BUSSTATE_ON;
 
-	hwif->atapi_dma = 0;		/* disable all atapi dma */ 
-
 	init_completion(&hwif->gendev_rel_comp);
 
 	default_hwif_iops(hwif);
@@ -379,7 +377,6 @@ static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
 
 	hwif->pio_mask			= tmp_hwif->pio_mask;
 
-	hwif->atapi_dma			= tmp_hwif->atapi_dma;
 	hwif->ultra_mask		= tmp_hwif->ultra_mask;
 	hwif->mwdma_mask		= tmp_hwif->mwdma_mask;
 	hwif->swdma_mask		= tmp_hwif->swdma_mask;

drivers/ide/mips/au1xxx-ide.c

@@ -699,9 +699,6 @@ static int au_ide_probe(struct device *dev)
 	hwif->dma_host_on		= &auide_dma_host_on;
 	hwif->dma_lost_irq		= &auide_dma_lost_irq;
 	hwif->ide_dma_on                = &auide_dma_on;
-
-	hwif->atapi_dma                 = 1;
-
 #else /* !CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA */
 	hwif->channel                   = 0;
 	hwif->hold                      = 1;

drivers/ide/pci/aec62xx.c

@@ -247,6 +247,7 @@ static ide_pci_device_t aec62xx_chipsets[] __devinitdata = {
 		.autodma	= AUTODMA,
 		.enablebits	= {{0x4a,0x02,0x02}, {0x4a,0x04,0x04}},
 		.bootable	= OFF_BOARD,
+		.host_flags	= IDE_HFLAG_NO_ATAPI_DMA,
 		.pio_mask	= ATA_PIO4,
 		.udma_mask	= 0x07, /* udma0-2 */
 	},{	/* 1 */
@@ -256,6 +257,7 @@ static ide_pci_device_t aec62xx_chipsets[] __devinitdata = {
 		.init_hwif	= init_hwif_aec62xx,
 		.autodma	= NOAUTODMA,
 		.bootable	= OFF_BOARD,
+		.host_flags	= IDE_HFLAG_NO_ATAPI_DMA,
 		.pio_mask	= ATA_PIO4,
 		.udma_mask	= 0x1f, /* udma0-4 */
 	},{	/* 2 */
@@ -266,6 +268,7 @@ static ide_pci_device_t aec62xx_chipsets[] __devinitdata = {
 		.autodma	= AUTODMA,
 		.enablebits	= {{0x4a,0x02,0x02}, {0x4a,0x04,0x04}},
 		.bootable	= NEVER_BOARD,
+		.host_flags	= IDE_HFLAG_NO_ATAPI_DMA,
 		.pio_mask	= ATA_PIO4,
 		.udma_mask	= 0x1f, /* udma0-4 */
 	},{	/* 3 */
@@ -275,6 +278,7 @@ static ide_pci_device_t aec62xx_chipsets[] __devinitdata = {
 		.init_hwif	= init_hwif_aec62xx,
 		.autodma	= AUTODMA,
 		.bootable	= OFF_BOARD,
+		.host_flags	= IDE_HFLAG_NO_ATAPI_DMA,
 		.pio_mask	= ATA_PIO4,
 		.udma_mask	= 0x3f, /* udma0-5 */
 	},{	/* 4 */
@@ -285,6 +289,7 @@ static ide_pci_device_t aec62xx_chipsets[] __devinitdata = {
 		.autodma	= AUTODMA,
 		.enablebits	= {{0x4a,0x02,0x02}, {0x4a,0x04,0x04}},
 		.bootable	= OFF_BOARD,
+		.host_flags	= IDE_HFLAG_NO_ATAPI_DMA,
 		.pio_mask	= ATA_PIO4,
 		.udma_mask	= 0x3f, /* udma0-5 */
 	}

drivers/ide/pci/alim15x3.c

@@ -677,8 +677,8 @@ static void __devinit init_hwif_common_ali15x3 (ide_hwif_t *hwif)
 	 * check in ->init_dma guarantees m5229_revision >= 0x20 here
 	 */
 
-	if (m5229_revision > 0x20)
-		hwif->atapi_dma = 1;
+	if (m5229_revision == 0x20)
+		hwif->host_flags |= IDE_HFLAG_NO_ATAPI_DMA;
 
 	if (m5229_revision <= 0x20)
 		hwif->ultra_mask = 0x00; /* no udma */

drivers/ide/pci/amd74xx.c

@@ -260,8 +260,6 @@ static void __devinit init_hwif_amd74xx(ide_hwif_t *hwif)
 	if (!hwif->dma_base)
 		return;
 
-        hwif->atapi_dma = 1;
-
 	hwif->ultra_mask = amd_config->udma_mask;
 	hwif->mwdma_mask = 0x07;
 	if ((amd_config->flags & AMD_BAD_SWDMA) == 0)

drivers/ide/pci/atiixp.c

@@ -183,7 +183,6 @@ static void __devinit init_hwif_atiixp(ide_hwif_t *hwif)
 	if (!hwif->dma_base)
 		return;
 
-	hwif->atapi_dma = 1;
 	hwif->ultra_mask = 0x3f;
 	hwif->mwdma_mask = 0x07;
 

drivers/ide/pci/cmd64x.c

@@ -517,7 +517,6 @@ static void __devinit init_hwif_cmd64x(ide_hwif_t *hwif)
 	if (!hwif->dma_base)
 		return;
 
-	hwif->atapi_dma  = 1;
 	hwif->mwdma_mask = 0x07;
 	hwif->ultra_mask = hwif->cds->udma_mask;
 

drivers/ide/pci/cs5520.c

@@ -125,6 +125,7 @@ static void __devinit cs5520_init_setup_dma(struct pci_dev *dev, ide_pci_device_
  
 static int cs5520_dma_on(ide_drive_t *drive)
 {
+	/* ATAPI is harder so leave it for now */
 	drive->vdma = 1;
 	return 0;
 }
@@ -141,8 +142,6 @@ static void __devinit init_hwif_cs5520(ide_hwif_t *hwif)
 
 	hwif->ide_dma_on = &cs5520_dma_on;
 
-	/* ATAPI is harder so leave it for now */
-	hwif->atapi_dma = 0;
 	hwif->ultra_mask = 0;
 	hwif->swdma_mask = 0;
 	hwif->mwdma_mask = 0;
@@ -156,7 +155,8 @@ static void __devinit init_hwif_cs5520(ide_hwif_t *hwif)
 		.autodma	= AUTODMA,			\
 		.bootable	= ON_BOARD,			\
 		.host_flags	= IDE_HFLAG_ISA_PORTS |		\
-				  IDE_HFLAG_VDMA,		\
+				  IDE_HFLAG_VDMA |		\
+				  IDE_HFLAG_NO_ATAPI_DMA,	\
 		.pio_mask	= ATA_PIO4,			\
 	}
 

drivers/ide/pci/cs5530.c

@@ -264,7 +264,6 @@ static void __devinit init_hwif_cs5530 (ide_hwif_t *hwif)
 	if (hwif->dma_base == 0)
 		return;
 
-	hwif->atapi_dma = 1;
 	hwif->ultra_mask = 0x07;
 	hwif->mwdma_mask = 0x07;
 

drivers/ide/pci/cs5535.c

@@ -185,7 +185,6 @@ static void __devinit init_hwif_cs5535(ide_hwif_t *hwif)
 	if (hwif->dma_base == 0)
 		return;
 
-	hwif->atapi_dma = 1;
 	hwif->ultra_mask = 0x1F;
 	hwif->mwdma_mask = 0x07;
 

drivers/ide/pci/cy82c693.c

@@ -437,7 +437,6 @@ static void __devinit init_hwif_cy82c693(ide_hwif_t *hwif)
 		return;
 	}
 
-	hwif->atapi_dma = 1;
 	hwif->mwdma_mask = 0x04;
 	hwif->swdma_mask = 0x04;
 

drivers/ide/pci/generic.c

@@ -69,7 +69,6 @@ static void __devinit init_hwif_generic (ide_hwif_t *hwif)
 	if (!(hwif->dma_base))
 		return;
 
-	hwif->atapi_dma = 1;
 	hwif->ultra_mask = 0x7f;
 	hwif->mwdma_mask = 0x07;
 	hwif->swdma_mask = 0x07;

drivers/ide/pci/hpt34x.c

@@ -155,6 +155,7 @@ static ide_pci_device_t hpt34x_chipset __devinitdata = {
 	.autodma	= NOAUTODMA,
 	.bootable	= NEVER_BOARD,
 	.extra		= 16,
+	.host_flags	= IDE_HFLAG_NO_ATAPI_DMA,
 	.pio_mask	= ATA_PIO5,
 };
 

drivers/ide/pci/hpt366.c

@@ -1555,6 +1555,7 @@ static ide_pci_device_t hpt366_chipsets[] __devinitdata = {
 		.enablebits	= {{0x50,0x04,0x04}, {0x54,0x04,0x04}},
 		.bootable	= OFF_BOARD,
 		.extra		= 240,
+		.host_flags	= IDE_HFLAG_NO_ATAPI_DMA,
 		.pio_mask	= ATA_PIO4,
 	},{	/* 1 */
 		.name		= "HPT372A",
@@ -1567,6 +1568,7 @@ static ide_pci_device_t hpt366_chipsets[] __devinitdata = {
 		.udma_mask	= HPT372_ALLOW_ATA133_6 ? ATA_UDMA6 : ATA_UDMA5,
 		.bootable	= OFF_BOARD,
 		.extra		= 240,
+		.host_flags	= IDE_HFLAG_NO_ATAPI_DMA,
 		.pio_mask	= ATA_PIO4,
 	},{	/* 2 */
 		.name		= "HPT302",
@@ -1579,6 +1581,7 @@ static ide_pci_device_t hpt366_chipsets[] __devinitdata = {
 		.udma_mask	= HPT302_ALLOW_ATA133_6 ? ATA_UDMA6 : ATA_UDMA5,
 		.bootable	= OFF_BOARD,
 		.extra		= 240,
+		.host_flags	= IDE_HFLAG_NO_ATAPI_DMA,
 		.pio_mask	= ATA_PIO4,
 	},{	/* 3 */
 		.name		= "HPT371",
@@ -1591,6 +1594,7 @@ static ide_pci_device_t hpt366_chipsets[] __devinitdata = {
 		.udma_mask	= HPT371_ALLOW_ATA133_6 ? ATA_UDMA6 : ATA_UDMA5,
 		.bootable	= OFF_BOARD,
 		.extra		= 240,
+		.host_flags	= IDE_HFLAG_NO_ATAPI_DMA,
 		.pio_mask	= ATA_PIO4,
 	},{	/* 4 */
 		.name		= "HPT374",
@@ -1603,6 +1607,7 @@ static ide_pci_device_t hpt366_chipsets[] __devinitdata = {
 		.udma_mask	= ATA_UDMA5,
 		.bootable	= OFF_BOARD,
 		.extra		= 240,
+		.host_flags	= IDE_HFLAG_NO_ATAPI_DMA,
 		.pio_mask	= ATA_PIO4,
 	},{	/* 5 */
 		.name		= "HPT372N",
@@ -1615,6 +1620,7 @@ static ide_pci_device_t hpt366_chipsets[] __devinitdata = {
 		.udma_mask	= HPT372_ALLOW_ATA133_6 ? ATA_UDMA6 : ATA_UDMA5,
 		.bootable	= OFF_BOARD,
 		.extra		= 240,
+		.host_flags	= IDE_HFLAG_NO_ATAPI_DMA,
 		.pio_mask	= ATA_PIO4,
 	}
 };

drivers/ide/pci/it8213.c

@@ -176,7 +176,6 @@ static void __devinit init_hwif_it8213(ide_hwif_t *hwif)
 	if (!hwif->dma_base)
 		return;
 
-	hwif->atapi_dma = 1;
 	hwif->ultra_mask = 0x7f;
 	hwif->mwdma_mask = 0x06;
 	hwif->swdma_mask = 0x04;

drivers/ide/pci/it821x.c

@@ -544,12 +544,10 @@ static void __devinit init_hwif_it821x(ide_hwif_t *hwif)
 
 	ide_set_hwifdata(hwif, idev);
 
-	hwif->atapi_dma = 1;
-
 	pci_read_config_byte(hwif->pci_dev, 0x50, &conf);
-	if(conf & 1) {
+	if (conf & 1) {
 		idev->smart = 1;
-		hwif->atapi_dma = 0;
+		hwif->host_flags |= IDE_HFLAG_NO_ATAPI_DMA;
 		/* Long I/O's although allowed in LBA48 space cause the
 		   onboard firmware to enter the twighlight zone */
 		hwif->rqsize = 256;
@@ -570,10 +568,10 @@ static void __devinit init_hwif_it821x(ide_hwif_t *hwif)
 	 */
 
 	pci_read_config_byte(hwif->pci_dev, 0x08, &conf);
-	if(conf == 0x10) {
+	if (conf == 0x10) {
 		idev->timing10 = 1;
-		hwif->atapi_dma = 0;
-		if(!idev->smart)
+		hwif->host_flags |= IDE_HFLAG_NO_ATAPI_DMA;
+		if (idev->smart == 0)
 			printk(KERN_WARNING "it821x: Revision 0x10, workarounds activated.\n");
 	}
 

drivers/ide/pci/jmicron.c

@@ -117,7 +117,6 @@ static void __devinit init_hwif_jmicron(ide_hwif_t *hwif)
 	if (hwif->dma_base == 0)
 		return;
 
-	hwif->atapi_dma = 1;
 	hwif->ultra_mask = 0x7f;
 	hwif->mwdma_mask = 0x07;
 

drivers/ide/pci/ns87415.c

@@ -268,7 +268,8 @@ static ide_pci_device_t ns87415_chipset __devinitdata = {
 	.init_hwif	= init_hwif_ns87415,
 	.autodma	= AUTODMA,
 	.bootable	= ON_BOARD,
-	.host_flags	= IDE_HFLAG_TRUST_BIOS_FOR_DMA,
+	.host_flags	= IDE_HFLAG_TRUST_BIOS_FOR_DMA |
+			  IDE_HFLAG_NO_ATAPI_DMA,
 };
 
 static int __devinit ns87415_init_one(struct pci_dev *dev, const struct pci_device_id *id)

drivers/ide/pci/opti621.c

@@ -336,7 +336,6 @@ static void __devinit init_hwif_opti621 (ide_hwif_t *hwif)
 	if (!(hwif->dma_base))
 		return;
 
-	hwif->atapi_dma = 1;
 	hwif->mwdma_mask = 0x07;
 	hwif->swdma_mask = 0x07;
 }

drivers/ide/pci/pdc202xx_new.c

@@ -482,8 +482,6 @@ static void __devinit init_hwif_pdc202new(ide_hwif_t *hwif)
 	if (hwif->dma_base == 0)
 		return;
 
-	hwif->atapi_dma  = 1;
-
 	hwif->ultra_mask = hwif->cds->udma_mask;
 	hwif->mwdma_mask = 0x07;
 

drivers/ide/pci/pdc202xx_old.c

@@ -330,7 +330,6 @@ static void __devinit init_hwif_pdc202xx(ide_hwif_t *hwif)
 	hwif->ultra_mask = hwif->cds->udma_mask;
 	hwif->mwdma_mask = 0x07;
 	hwif->swdma_mask = 0x07;
-	hwif->atapi_dma = 1;
 
 	hwif->dma_lost_irq = &pdc202xx_dma_lost_irq;
 	hwif->dma_timeout = &pdc202xx_dma_timeout;

drivers/ide/pci/piix.c

@@ -397,8 +397,6 @@ static void __devinit init_hwif_piix(ide_hwif_t *hwif)
 	if (piix_is_ichx(hwif->pci_dev))
 		hwif->ide_dma_clear_irq = &piix_dma_clear_irq;
 
-	hwif->atapi_dma = 1;
-
 	hwif->ultra_mask = hwif->cds->udma_mask;
 	hwif->mwdma_mask = 0x06;
 	hwif->swdma_mask = 0x04;

drivers/ide/pci/sc1200.c

@@ -377,7 +377,6 @@ static void __devinit init_hwif_sc1200 (ide_hwif_t *hwif)
 	hwif->udma_filter = sc1200_udma_filter;
 	hwif->ide_dma_end   = &sc1200_ide_dma_end;
 
-        hwif->atapi_dma = 1;
         hwif->ultra_mask = 0x07;
         hwif->mwdma_mask = 0x07;
 }

drivers/ide/pci/scc_pata.c

@@ -693,7 +693,6 @@ static void __devinit init_hwif_scc(ide_hwif_t *hwif)
 	}
 	hwif->mwdma_mask = 0x00;
 	hwif->swdma_mask = 0x00;
-	hwif->atapi_dma = 1;
 
 	/* we support 80c cable only. */
 	hwif->cbl = ATA_CBL_PATA80;

drivers/ide/pci/serverworks.c

@@ -367,8 +367,6 @@ static void __devinit init_hwif_svwks (ide_hwif_t *hwif)
 	hwif->set_dma_mode = &svwks_set_dma_mode;
 	hwif->udma_filter = &svwks_udma_filter;
 
-	hwif->atapi_dma = 1;
-
 	if (hwif->pci_dev->device != PCI_DEVICE_ID_SERVERWORKS_OSB4IDE)
 		hwif->ultra_mask = 0x3f;
 

drivers/ide/pci/sgiioc4.c

@@ -592,7 +592,6 @@ ide_init_sgiioc4(ide_hwif_t * hwif)
 	if (hwif->dma_base == 0)
 		return;
 
-	hwif->atapi_dma = 1;
 	hwif->mwdma_mask = 0x04;
 
 	hwif->dma_setup = &sgiioc4_ide_dma_setup;

drivers/ide/pci/siimage.c

@@ -899,8 +899,8 @@ static void __devinit init_hwif_siimage(ide_hwif_t *hwif)
 	hwif->ultra_mask = 0x7f;
 	hwif->mwdma_mask = 0x07;
 
-	if (!is_sata(hwif))
-		hwif->atapi_dma = 1;
+	if (is_sata(hwif))
+		hwif->host_flags |= IDE_HFLAG_NO_ATAPI_DMA;
 
 	if (hwif->cbl != ATA_CBL_PATA40_SHORT)
 		hwif->cbl = ata66_siimage(hwif);

drivers/ide/pci/sis5513.c

@@ -579,8 +579,6 @@ static void __devinit init_hwif_sis5513 (ide_hwif_t *hwif)
 	if (hwif->dma_base == 0)
 		return;
 
-	hwif->atapi_dma = 1;
-
 	hwif->ultra_mask = udma_rates[chipset_family];
 	hwif->mwdma_mask = 0x07;
 

drivers/ide/pci/sl82c105.c

@@ -388,7 +388,6 @@ static void __devinit init_hwif_sl82c105(ide_hwif_t *hwif)
 		return;
 	}
 
-	hwif->atapi_dma  = 1;
 	hwif->mwdma_mask = 0x07;
 
 	hwif->ide_dma_on		= &sl82c105_ide_dma_on;

drivers/ide/pci/slc90e66.c

@@ -147,7 +147,6 @@ static void __devinit init_hwif_slc90e66 (ide_hwif_t *hwif)
 	if (hwif->dma_base == 0)
 		return;
 
-	hwif->atapi_dma = 1;
 	hwif->ultra_mask = 0x1f;
 	hwif->mwdma_mask = 0x06;
 	hwif->swdma_mask = 0x04;

drivers/ide/pci/tc86c001.c

@@ -198,7 +198,6 @@ static void __devinit init_hwif_tc86c001(ide_hwif_t *hwif)
 	/* Sector Count Register limit */
 	hwif->rqsize	 = 0xffff;
 
-	hwif->atapi_dma  = 1;
 	hwif->ultra_mask = 0x1f;
 	hwif->mwdma_mask = 0x07;
 

drivers/ide/pci/triflex.c

@@ -104,7 +104,6 @@ static void __devinit init_hwif_triflex(ide_hwif_t *hwif)
 	if (hwif->dma_base == 0)
 		return;
 
-	hwif->atapi_dma  = 1;
 	hwif->mwdma_mask = 0x07;
 	hwif->swdma_mask = 0x07;
 }

drivers/ide/pci/trm290.c

@@ -327,7 +327,9 @@ static ide_pci_device_t trm290_chipset __devinitdata = {
 	.autodma	= NOAUTODMA,
 	.bootable	= ON_BOARD,
 #if 0 /* play it safe for now */
-	.host_flags	= IDE_HFLAG_TRUST_BIOS_FOR_DMA,
+	.host_flags	= IDE_HFLAG_TRUST_BIOS_FOR_DMA | IDE_HFLAG_NO_ATAPI_DMA,
+#else
+	.host_flags	= IDE_HFLAG_NO_ATAPI_DMA,
 #endif
 };
 

drivers/ide/pci/via82cxxx.c

@@ -443,8 +443,6 @@ static void __devinit init_hwif_via82cxxx(ide_hwif_t *hwif)
 	if (!hwif->dma_base)
 		return;
 
-	hwif->atapi_dma = 1;
-
 	hwif->ultra_mask = vdev->via_config->udma_mask;
 	hwif->mwdma_mask = 0x07;
 	hwif->swdma_mask = 0x07;

drivers/ide/ppc/pmac.c

@@ -1780,7 +1780,6 @@ pmac_ide_setup_dma(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif)
 	hwif->dma_timeout = &ide_dma_timeout;
 	hwif->dma_lost_irq = &pmac_ide_dma_lost_irq;
 
-	hwif->atapi_dma = 1;
 	switch(pmif->kind) {
 		case controller_sh_ata6:
 			hwif->ultra_mask = pmif->cable_80 ? 0x7f : 0x07;

include/linux/ide.h

@@ -685,7 +685,6 @@ typedef struct hwif_s {
 
 	u8 pio_mask;
 
-	u8 atapi_dma;	/* host supports atapi_dma */
 	u8 ultra_mask;
 	u8 mwdma_mask;
 	u8 swdma_mask;
@@ -1258,6 +1257,8 @@ enum {
 	IDE_HFLAG_TRUST_BIOS_FOR_DMA	= (1 << 10),
 	/* host uses VDMA */
 	IDE_HFLAG_VDMA			= (1 << 11),
+	/* ATAPI DMA is unsupported */
+	IDE_HFLAG_NO_ATAPI_DMA		= (1 << 12),
 };
 
 typedef struct ide_pci_device_s {