6 files changed, 22 insertions, 29 deletions

diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index 4703837bf1fc..7568c3e81f2f 100644
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -968,11 +968,6 @@ void ide_setup_dma(ide_hwif_t *hwif, unsigned long base, unsigned num_ports)
 
         hwif->dma_base = base;
 
-        if (hwif->mate)
-                hwif->dma_master = hwif->channel ? hwif->mate->dma_base : base;
-        else
-                hwif->dma_master = base;
-
         if (!(hwif->dma_command))
                 hwif->dma_command       = hwif->dma_base;
         if (!(hwif->dma_vendor1))
@@ -1014,8 +1009,6 @@ void ide_setup_dma(ide_hwif_t *hwif, unsigned long base, unsigned num_ports)
                        hwif->drives[1].name, (dma_stat & 0x40) ? "DMA" : "pio");
         }
         printk("\n");
-
-        BUG_ON(!hwif->dma_master);
 }
 
 EXPORT_SYMBOL_GPL(ide_setup_dma);
diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index 54943da6e4e5..9ab5458fe950 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -468,7 +468,6 @@ static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
 #endif
 
         hwif->dma_base                  = tmp_hwif->dma_base;
-        hwif->dma_master                = tmp_hwif->dma_master;
         hwif->dma_command               = tmp_hwif->dma_command;
         hwif->dma_vendor1               = tmp_hwif->dma_vendor1;
         hwif->dma_status                = tmp_hwif->dma_status;
@@ -602,7 +601,6 @@ void ide_unregister(unsigned int index)
                 (void) ide_release_dma(hwif);
 
                 hwif->dma_base = 0;
-                hwif->dma_master = 0;
                 hwif->dma_command = 0;
                 hwif->dma_vendor1 = 0;
                 hwif->dma_status = 0;
diff --git a/drivers/ide/pci/cmd64x.c b/drivers/ide/pci/cmd64x.c
index bc553337b1be..f3613bac9dbe 100644
--- a/drivers/ide/pci/cmd64x.c
+++ b/drivers/ide/pci/cmd64x.c
@@ -333,14 +333,15 @@ static void cmd64x_set_dma_mode(ide_drive_t *drive, const u8 speed)
 static int cmd648_ide_dma_end (ide_drive_t *drive)
 {
         ide_hwif_t *hwif        = HWIF(drive);
+        unsigned long base      = hwif->dma_base - (hwif->channel * 8);
         int err                 = __ide_dma_end(drive);
         u8  irq_mask            = hwif->channel ? MRDMODE_INTR_CH1 :
                                                   MRDMODE_INTR_CH0;
-        u8  mrdmode             = inb(hwif->dma_master + 0x01);
+        u8  mrdmode             = inb(base + 1);
 
         /* clear the interrupt bit */
         outb((mrdmode & ~(MRDMODE_INTR_CH0 | MRDMODE_INTR_CH1)) | irq_mask,
-             hwif->dma_master + 0x01);
+             base + 1);
 
         return err;
 }
@@ -365,10 +366,11 @@ static int cmd64x_ide_dma_end (ide_drive_t *drive)
 static int cmd648_ide_dma_test_irq (ide_drive_t *drive)
 {
         ide_hwif_t *hwif        = HWIF(drive);
+        unsigned long base      = hwif->dma_base - (hwif->channel * 8);
         u8 irq_mask             = hwif->channel ? MRDMODE_INTR_CH1 :
                                                   MRDMODE_INTR_CH0;
         u8 dma_stat             = inb(hwif->dma_status);
-        u8 mrdmode              = inb(hwif->dma_master + 0x01);
+        u8 mrdmode              = inb(base + 1);
 
 #ifdef DEBUG
         printk("%s: dma_stat: 0x%02x mrdmode: 0x%02x irq_mask: 0x%02x\n",
diff --git a/drivers/ide/pci/hpt366.c b/drivers/ide/pci/hpt366.c
index df14d692743c..d3826a66834d 100644
--- a/drivers/ide/pci/hpt366.c
+++ b/drivers/ide/pci/hpt366.c
@@ -894,32 +894,33 @@ static int hpt374_ide_dma_end(ide_drive_t *drive)
 
 static void hpt3xxn_set_clock(ide_hwif_t *hwif, u8 mode)
 {
-        u8 scr2 = inb(hwif->dma_master + 0x7b);
+        unsigned long base = hwif->extra_base;
+        u8 scr2 = inb(base + 0x6b);
 
         if ((scr2 & 0x7f) == mode)
                 return;
 
         /* Tristate the bus */
-        outb(0x80, hwif->dma_master + 0x73);
-        outb(0x80, hwif->dma_master + 0x77);
+        outb(0x80, base + 0x63);
+        outb(0x80, base + 0x67);
 
         /* Switch clock and reset channels */
-        outb(mode, hwif->dma_master + 0x7b);
-        outb(0xc0, hwif->dma_master + 0x79);
+        outb(mode, base + 0x6b);
+        outb(0xc0, base + 0x69);
 
         /*
          * Reset the state machines.
          * NOTE: avoid accidentally enabling the disabled channels.
          */
-        outb(inb(hwif->dma_master + 0x70) | 0x32, hwif->dma_master + 0x70);
-        outb(inb(hwif->dma_master + 0x74) | 0x32, hwif->dma_master + 0x74);
+        outb(inb(base + 0x60) | 0x32, base + 0x60);
+        outb(inb(base + 0x64) | 0x32, base + 0x64);
 
         /* Complete reset */
-        outb(0x00, hwif->dma_master + 0x79);
+        outb(0x00, base + 0x69);
 
         /* Reconnect channels to bus */
-        outb(0x00, hwif->dma_master + 0x73);
-        outb(0x00, hwif->dma_master + 0x77);
+        outb(0x00, base + 0x63);
+        outb(0x00, base + 0x67);
 }
 
 /**
diff --git a/drivers/ide/pci/pdc202xx_old.c b/drivers/ide/pci/pdc202xx_old.c
index e09742e2ba59..22c7a7533b69 100644
--- a/drivers/ide/pci/pdc202xx_old.c
+++ b/drivers/ide/pci/pdc202xx_old.c
@@ -162,7 +162,7 @@ static u8 pdc202xx_old_cable_detect (ide_hwif_t *hwif)
  */
 static void pdc_old_enable_66MHz_clock(ide_hwif_t *hwif)
 {
-        unsigned long clock_reg = hwif->dma_master + 0x11;
+        unsigned long clock_reg = hwif->extra_base + 0x01;
         u8 clock = inb(clock_reg);
 
         outb(clock | (hwif->channel ? 0x08 : 0x02), clock_reg);
@@ -170,7 +170,7 @@ static void pdc_old_enable_66MHz_clock(ide_hwif_t *hwif)
 
 static void pdc_old_disable_66MHz_clock(ide_hwif_t *hwif)
 {
-        unsigned long clock_reg = hwif->dma_master + 0x11;
+        unsigned long clock_reg = hwif->extra_base + 0x01;
         u8 clock = inb(clock_reg);
 
         outb(clock & ~(hwif->channel ? 0x08 : 0x02), clock_reg);
@@ -193,7 +193,7 @@ static void pdc202xx_old_ide_dma_start(ide_drive_t *drive)
         if (drive->media != ide_disk || drive->addressing == 1) {
                 struct request *rq      = HWGROUP(drive)->rq;
                 ide_hwif_t *hwif        = HWIF(drive);
-                unsigned long high_16   = hwif->dma_master;
+                unsigned long high_16   = hwif->extra_base - 16;
                 unsigned long atapi_reg = high_16 + (hwif->channel ? 0x24 : 0x20);
                 u32 word_count  = 0;
                 u8 clock = inb(high_16 + 0x11);
@@ -212,7 +212,7 @@ static int pdc202xx_old_ide_dma_end(ide_drive_t *drive)
 {
         if (drive->media != ide_disk || drive->addressing == 1) {
                 ide_hwif_t *hwif        = HWIF(drive);
-                unsigned long high_16   = hwif->dma_master;
+                unsigned long high_16   = hwif->extra_base - 16;
                 unsigned long atapi_reg = high_16 + (hwif->channel ? 0x24 : 0x20);
                 u8 clock                = 0;
 
@@ -228,7 +228,7 @@ static int pdc202xx_old_ide_dma_end(ide_drive_t *drive)
 static int pdc202xx_old_ide_dma_test_irq(ide_drive_t *drive)
 {
         ide_hwif_t *hwif        = HWIF(drive);
-        unsigned long high_16   = hwif->dma_master;
+        unsigned long high_16   = hwif->extra_base - 16;
         u8 dma_stat             = inb(hwif->dma_status);
         u8 sc1d                 = inb(high_16 + 0x001d);
 
@@ -271,7 +271,7 @@ static void pdc202xx_dma_timeout(ide_drive_t *drive)
 
 static void pdc202xx_reset_host (ide_hwif_t *hwif)
 {
-        unsigned long high_16   = hwif->dma_master;
+        unsigned long high_16   = hwif->extra_base - 16;
         u8 udma_speed_flag      = inb(high_16 | 0x001f);
 
         outb(udma_speed_flag | 0x10, high_16 | 0x001f);
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 9a6a41e7079f..1fb03b630676 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -766,7 +766,6 @@ typedef struct hwif_s {
         int             rqsize;         /* max sectors per request */
         int             irq;            /* our irq number */
 
-        unsigned long   dma_master;     /* reference base addr dmabase */
         unsigned long   dma_base;       /* base addr for dma ports */
         unsigned long   dma_command;    /* dma command register */
         unsigned long   dma_vendor1;    /* dma vendor 1 register */