36 files changed, 101 insertions, 87 deletions

diff --git a/drivers/ide/aec62xx.c b/drivers/ide/aec62xx.c
index 3790847361c3..57d00caefc86 100644
--- a/drivers/ide/aec62xx.c
+++ b/drivers/ide/aec62xx.c
@@ -81,15 +81,15 @@ static u8 pci_bus_clock_list_ultra (u8 speed, struct chipset_bus_clock_list_entr
         return chipset_table->ultra_settings;
 }
 
-static void aec6210_set_mode(ide_drive_t *drive, const u8 speed)
+static void aec6210_set_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        ide_hwif_t *hwif        = drive->hwif;
         struct pci_dev *dev     = to_pci_dev(hwif->dev);
         struct ide_host *host   = pci_get_drvdata(dev);
         struct chipset_bus_clock_list_entry *bus_clock = host->host_priv;
         u16 d_conf              = 0;
         u8 ultra = 0, ultra_conf = 0;
         u8 tmp0 = 0, tmp1 = 0, tmp2 = 0;
+        const u8 speed = drive->dma_mode;
         unsigned long flags;
 
         local_irq_save(flags);
@@ -109,15 +109,15 @@ static void aec6210_set_mode(ide_drive_t *drive, const u8 speed)
         local_irq_restore(flags);
 }
 
-static void aec6260_set_mode(ide_drive_t *drive, const u8 speed)
+static void aec6260_set_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        ide_hwif_t *hwif        = drive->hwif;
         struct pci_dev *dev     = to_pci_dev(hwif->dev);
         struct ide_host *host   = pci_get_drvdata(dev);
         struct chipset_bus_clock_list_entry *bus_clock = host->host_priv;
         u8 unit                 = drive->dn & 1;
         u8 tmp1 = 0, tmp2 = 0;
         u8 ultra = 0, drive_conf = 0, ultra_conf = 0;
+        const u8 speed = drive->dma_mode;
         unsigned long flags;
 
         local_irq_save(flags);
@@ -137,7 +137,7 @@ static void aec6260_set_mode(ide_drive_t *drive, const u8 speed)
 static void aec_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
         drive->dma_mode = drive->pio_mode;
-        hwif->port_ops->set_dma_mode(drive, drive->dma_mode);
+        hwif->port_ops->set_dma_mode(hwif, drive);
 }
 
 static int init_chipset_aec62xx(struct pci_dev *dev)
diff --git a/drivers/ide/alim15x3.c b/drivers/ide/alim15x3.c
index 28cee1055f76..6f0debae4e27 100644
--- a/drivers/ide/alim15x3.c
+++ b/drivers/ide/alim15x3.c
@@ -121,16 +121,16 @@ static u8 ali_udma_filter(ide_drive_t *drive)
 
 /**
  *      ali_set_dma_mode        -       set host controller for DMA mode
+ *      @hwif: port
  *      @drive: drive
- *      @speed: DMA mode
  *
  *      Configure the hardware for the desired IDE transfer mode.
  */
 
-static void ali_set_dma_mode(ide_drive_t *drive, const u8 speed)
+static void ali_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        ide_hwif_t *hwif        = drive->hwif;
         struct pci_dev *dev     = to_pci_dev(hwif->dev);
+        const u8 speed          = drive->dma_mode;
         u8 speed1               = speed;
         u8 unit                 = drive->dn & 1;
         u8 tmpbyte              = 0x00;
diff --git a/drivers/ide/amd74xx.c b/drivers/ide/amd74xx.c
index 3eee7be7ca6f..b7e105338205 100644
--- a/drivers/ide/amd74xx.c
+++ b/drivers/ide/amd74xx.c
@@ -79,14 +79,14 @@ static void amd_set_speed(struct pci_dev *dev, u8 dn, u8 udma_mask,
  * to a desired transfer mode.  It also can be called by upper layers.
  */
 
-static void amd_set_drive(ide_drive_t *drive, const u8 speed)
+static void amd_set_drive(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        ide_hwif_t *hwif = drive->hwif;
         struct pci_dev *dev = to_pci_dev(hwif->dev);
         ide_drive_t *peer = ide_get_pair_dev(drive);
         struct ide_timing t, p;
         int T, UT;
         u8 udma_mask = hwif->ultra_mask;
+        const u8 speed = drive->dma_mode;
 
         T = 1000000000 / amd_clock;
         UT = (udma_mask == ATA_UDMA2) ? T : (T / 2);
@@ -110,7 +110,8 @@ static void amd_set_drive(ide_drive_t *drive, const u8 speed)
 
 static void amd_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        amd_set_drive(drive, drive->pio_mode);
+        drive->dma_mode = drive->pio_mode;
+        amd_set_drive(hwif, drive);
 }
 
 static void amd7409_cable_detect(struct pci_dev *dev)
diff --git a/drivers/ide/atiixp.c b/drivers/ide/atiixp.c
index b6848dfb93b0..15f0ead89f5c 100644
--- a/drivers/ide/atiixp.c
+++ b/drivers/ide/atiixp.c
@@ -75,21 +75,22 @@ static void atiixp_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 
 /**
  *      atiixp_set_dma_mode     -       set host controller for DMA mode
+ *      @hwif: port
  *      @drive: drive
- *      @speed: DMA mode
  *
  *      Set a ATIIXP host controller to the desired DMA mode.  This involves
  *      programming the right timing data into the PCI configuration space.
  */
 
-static void atiixp_set_dma_mode(ide_drive_t *drive, const u8 speed)
+static void atiixp_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
+        struct pci_dev *dev = to_pci_dev(hwif->dev);
         unsigned long flags;
         int timing_shift = (drive->dn ^ 1) * 8;
         u32 tmp32;
         u16 tmp16;
         u16 udma_ctl = 0;
+        const u8 speed = drive->dma_mode;
 
         spin_lock_irqsave(&atiixp_lock, flags);
 
diff --git a/drivers/ide/au1xxx-ide.c b/drivers/ide/au1xxx-ide.c
index c90e9b0a9f6e..e2fd378ba9de 100644
--- a/drivers/ide/au1xxx-ide.c
+++ b/drivers/ide/au1xxx-ide.c
@@ -160,11 +160,11 @@ static void au1xxx_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
         au_writel(mem_stcfg,MEM_STCFG2);
 }
 
-static void auide_set_dma_mode(ide_drive_t *drive, const u8 speed)
+static void auide_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
         int mem_sttime = 0, mem_stcfg = au_readl(MEM_STCFG2);
 
-        switch(speed) {
+        switch (drive->dma_mode) {
 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
         case XFER_MW_DMA_2:
                 mem_sttime = SBC_IDE_TIMING(MDMA2);
diff --git a/drivers/ide/cmd64x.c b/drivers/ide/cmd64x.c
index 0b11745937e7..a65a69171250 100644
--- a/drivers/ide/cmd64x.c
+++ b/drivers/ide/cmd64x.c
@@ -141,12 +141,12 @@ static void cmd64x_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
         cmd64x_program_timings(drive, XFER_PIO_0 + pio);
 }
 
-static void cmd64x_set_dma_mode(ide_drive_t *drive, const u8 speed)
+static void cmd64x_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        ide_hwif_t *hwif        = drive->hwif;
         struct pci_dev *dev     = to_pci_dev(hwif->dev);
         u8 unit                 = drive->dn & 0x01;
         u8 regU = 0, pciU       = hwif->channel ? UDIDETCR1 : UDIDETCR0;
+        const u8 speed          = drive->dma_mode;
 
         pci_read_config_byte(dev, pciU, &regU);
         regU &= ~(unit ? 0xCA : 0x35);
diff --git a/drivers/ide/cs5520.c b/drivers/ide/cs5520.c
index b8094f049f3e..2c1e5f7cd261 100644
--- a/drivers/ide/cs5520.c
+++ b/drivers/ide/cs5520.c
@@ -81,12 +81,12 @@ static void cs5520_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
                 (cs5520_pio_clocks[pio].assert));
 }
 
-static void cs5520_set_dma_mode(ide_drive_t *drive, const u8 speed)
+static void cs5520_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
         printk(KERN_ERR "cs55x0: bad ide timing.\n");
 
         drive->pio_mode = XFER_PIO_0 + 0;
-        cs5520_set_pio_mode(drive->hwif, drive);
+        cs5520_set_pio_mode(hwif, drive);
 }
 
 static const struct ide_port_ops cs5520_port_ops = {
diff --git a/drivers/ide/cs5530.c b/drivers/ide/cs5530.c
index 4ced40255ad6..4dc4eb92b076 100644
--- a/drivers/ide/cs5530.c
+++ b/drivers/ide/cs5530.c
@@ -100,12 +100,12 @@ out:
         return mask;
 }
 
-static void cs5530_set_dma_mode(ide_drive_t *drive, const u8 mode)
+static void cs5530_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
         unsigned long basereg;
         unsigned int reg, timings = 0;
 
-        switch (mode) {
+        switch (drive->dma_mode) {
                 case XFER_UDMA_0:       timings = 0x00921250; break;
                 case XFER_UDMA_1:       timings = 0x00911140; break;
                 case XFER_UDMA_2:       timings = 0x00911030; break;
@@ -113,7 +113,7 @@ static void cs5530_set_dma_mode(ide_drive_t *drive, const u8 mode)
                 case XFER_MW_DMA_1:     timings = 0x00012121; break;
                 case XFER_MW_DMA_2:     timings = 0x00002020; break;
         }
-        basereg = CS5530_BASEREG(drive->hwif);
+        basereg = CS5530_BASEREG(hwif);
         reg = inl(basereg + 4);                 /* get drive0 config register */
         timings |= reg & 0x80000000;            /* preserve PIO format bit */
         if ((drive-> dn & 1) == 0) {            /* are we configuring drive0? */
diff --git a/drivers/ide/cs5535.c b/drivers/ide/cs5535.c
index 7974415ea89f..740002b2f3e8 100644
--- a/drivers/ide/cs5535.c
+++ b/drivers/ide/cs5535.c
@@ -129,15 +129,15 @@ static void cs5535_set_speed(ide_drive_t *drive, const u8 speed)
 
 /**
  *      cs5535_set_dma_mode     -       set host controller for DMA mode
+ *      @hwif: port
  *      @drive: drive
- *      @speed: DMA mode
  *
  *      Programs the chipset for DMA mode.
  */
 
-static void cs5535_set_dma_mode(ide_drive_t *drive, const u8 speed)
+static void cs5535_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        cs5535_set_speed(drive, speed);
+        cs5535_set_speed(drive, drive->dma_mode);
 }
 
 /**
diff --git a/drivers/ide/cs5536.c b/drivers/ide/cs5536.c
index b518ef0e9a35..70871fbc3c0a 100644
--- a/drivers/ide/cs5536.c
+++ b/drivers/ide/cs5536.c
@@ -173,11 +173,11 @@ static void cs5536_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 
 /**
  *      cs5536_set_dma_mode             -       DMA timing setup
+ *      @hwif: ATA port
  *      @drive: ATA device
- *      @mode: DMA mode
  */
 
-static void cs5536_set_dma_mode(ide_drive_t *drive, const u8 mode)
+static void cs5536_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
         static const u8 udma_timings[6] = {
                 0xc2, 0xc1, 0xc0, 0xc4, 0xc5, 0xc6,
@@ -187,10 +187,11 @@ static void cs5536_set_dma_mode(ide_drive_t *drive, const u8 mode)
                 0x67, 0x21, 0x20,
         };
 
-        struct pci_dev *pdev = to_pci_dev(drive->hwif->dev);
+        struct pci_dev *pdev = to_pci_dev(hwif->dev);
         int dshift = (drive->dn & 1) ? IDE_D1_SHIFT : IDE_D0_SHIFT;
         unsigned long timings = (unsigned long)ide_get_drivedata(drive);
         u32 etc;
+        const u8 mode = drive->dma_mode;
 
         cs5536_read(pdev, ETC, &etc);
 
diff --git a/drivers/ide/cy82c693.c b/drivers/ide/cy82c693.c
index ead65c394f00..9383f67deae1 100644
--- a/drivers/ide/cy82c693.c
+++ b/drivers/ide/cy82c693.c
@@ -53,9 +53,9 @@
  * set DMA mode a specific channel for CY82C693
  */
 
-static void cy82c693_set_dma_mode(ide_drive_t *drive, const u8 mode)
+static void cy82c693_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        ide_hwif_t *hwif = drive->hwif;
+        const u8 mode = drive->dma_mode;
         u8 single = (mode & 0x10) >> 4, index = 0, data = 0;
 
         index = hwif->channel ? CY82_INDEX_CHANNEL1 : CY82_INDEX_CHANNEL0;
diff --git a/drivers/ide/hpt366.c b/drivers/ide/hpt366.c
index f1dec519a9e6..b885c1d548f5 100644
--- a/drivers/ide/hpt366.c
+++ b/drivers/ide/hpt366.c
@@ -627,14 +627,14 @@ static u32 get_speed_setting(u8 speed, struct hpt_info *info)
         return info->timings->clock_table[info->clock][i];
 }
 
-static void hpt3xx_set_mode(ide_drive_t *drive, const u8 speed)
+static void hpt3xx_set_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        ide_hwif_t *hwif        = drive->hwif;
         struct pci_dev *dev     = to_pci_dev(hwif->dev);
         struct hpt_info *info   = hpt3xx_get_info(hwif->dev);
         struct hpt_timings *t   = info->timings;
         u8  itr_addr            = 0x40 + (drive->dn * 4);
         u32 old_itr             = 0;
+        const u8 speed          = drive->dma_mode;
         u32 new_itr             = get_speed_setting(speed, info);
         u32 itr_mask            = speed < XFER_MW_DMA_0 ? t->pio_mask :
                                  (speed < XFER_UDMA_0   ? t->dma_mask :
@@ -653,7 +653,8 @@ static void hpt3xx_set_mode(ide_drive_t *drive, const u8 speed)
 
 static void hpt3xx_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        hpt3xx_set_mode(drive, drive->pio_mode);
+        drive->dma_mode = drive->pio_mode;
+        hpt3xx_set_mode(hwif, drive);
 }
 
 static void hpt3xx_maskproc(ide_drive_t *drive, int mask)
diff --git a/drivers/ide/icside.c b/drivers/ide/icside.c
index 0f67f1abbbd3..26b6c0a1f772 100644
--- a/drivers/ide/icside.c
+++ b/drivers/ide/icside.c
@@ -185,10 +185,11 @@ static const expansioncard_ops_t icside_ops_arcin_v6 = {
  *      MW1     80      50      50      150     C
  *      MW2     70      25      25      120     C
  */
-static void icside_set_dma_mode(ide_drive_t *drive, const u8 xfer_mode)
+static void icside_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
         unsigned long cycle_time;
         int use_dma_info = 0;
+        const u8 xfer_mode = drive->dma_mode;
 
         switch (xfer_mode) {
         case XFER_MW_DMA_2:
diff --git a/drivers/ide/ide-xfer-mode.c b/drivers/ide/ide-xfer-mode.c
index a62fb03fc1cc..9b549e4d1848 100644
--- a/drivers/ide/ide-xfer-mode.c
+++ b/drivers/ide/ide-xfer-mode.c
@@ -168,11 +168,11 @@ int ide_set_dma_mode(ide_drive_t *drive, const u8 mode)
                 if (ide_config_drive_speed(drive, mode))
                         return -1;
                 drive->dma_mode = mode;
-                port_ops->set_dma_mode(drive, mode);
+                port_ops->set_dma_mode(hwif, drive);
                 return 0;
         } else {
                 drive->dma_mode = mode;
-                port_ops->set_dma_mode(drive, mode);
+                port_ops->set_dma_mode(hwif, drive);
                 return ide_config_drive_speed(drive, mode);
         }
 }
diff --git a/drivers/ide/it8172.c b/drivers/ide/it8172.c
index 9dfdc8741a7b..560e66d07659 100644
--- a/drivers/ide/it8172.c
+++ b/drivers/ide/it8172.c
@@ -77,14 +77,14 @@ static void it8172_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
         pci_write_config_dword(dev, 0x44, drive_timing);
 }
 
-static void it8172_set_dma_mode(ide_drive_t *drive, const u8 speed)
+static void it8172_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        ide_hwif_t *hwif        = drive->hwif;
         struct pci_dev *dev     = to_pci_dev(hwif->dev);
         int a_speed             = 3 << (drive->dn * 4);
         int u_flag              = 1 << drive->dn;
         int u_speed             = 0;
         u8 reg48, reg4a;
+        const u8 speed          = drive->dma_mode;
 
         pci_read_config_byte(dev, 0x48, &reg48);
         pci_read_config_byte(dev, 0x4a, &reg4a);
diff --git a/drivers/ide/it8213.c b/drivers/ide/it8213.c
index 492c07d5f4f3..46816ba26416 100644
--- a/drivers/ide/it8213.c
+++ b/drivers/ide/it8213.c
@@ -74,15 +74,14 @@ static void it8213_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 
 /**
  *      it8213_set_dma_mode     -       set host controller for DMA mode
+ *      @hwif: port
  *      @drive: drive
- *      @speed: DMA mode
  *
  *      Tune the ITE chipset for the DMA mode.
  */
 
-static void it8213_set_dma_mode(ide_drive_t *drive, const u8 speed)
+static void it8213_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        ide_hwif_t *hwif        = drive->hwif;
         struct pci_dev *dev     = to_pci_dev(hwif->dev);
         u8 maslave              = 0x40;
         int a_speed             = 3 << (drive->dn * 4);
@@ -92,6 +91,7 @@ static void it8213_set_dma_mode(ide_drive_t *drive, const u8 speed)
         int u_speed             = 0;
         u16                     reg4042, reg4a;
         u8                      reg48, reg54, reg55;
+        const u8 speed          = drive->dma_mode;
 
         pci_read_config_word(dev, maslave, &reg4042);
         pci_read_config_byte(dev, 0x48, &reg48);
diff --git a/drivers/ide/it821x.c b/drivers/ide/it821x.c
index 69becb7b9656..56b79194156b 100644
--- a/drivers/ide/it821x.c
+++ b/drivers/ide/it821x.c
@@ -393,14 +393,16 @@ static int it821x_dma_end(ide_drive_t *drive)
 
 /**
  *      it821x_set_dma_mode     -       set host controller for DMA mode
+ *      @hwif: port
  *      @drive: drive
- *      @speed: DMA mode
  *
  *      Tune the ITE chipset for the desired DMA mode.
  */
 
-static void it821x_set_dma_mode(ide_drive_t *drive, const u8 speed)
+static void it821x_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
+        const u8 speed = drive->dma_mode;
+
         /*
          * MWDMA tuning is really hard because our MWDMA and PIO
          * timings are kept in the same place.  We can switch in the
diff --git a/drivers/ide/jmicron.c b/drivers/ide/jmicron.c
index ebffb904ed24..74c2c4a6d909 100644
--- a/drivers/ide/jmicron.c
+++ b/drivers/ide/jmicron.c
@@ -86,13 +86,13 @@ static void jmicron_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 
 /**
  *      jmicron_set_dma_mode    -       set host controller for DMA mode
+ *      @hwif: port
  *      @drive: drive
- *      @mode: DMA mode
  *
  *      As the JMicron snoops for timings we don't need to do anything here.
  */
 
-static void jmicron_set_dma_mode(ide_drive_t *drive, const u8 mode)
+static void jmicron_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
 }
 
diff --git a/drivers/ide/palm_bk3710.c b/drivers/ide/palm_bk3710.c
index 0f262d07c378..35448c91b8c8 100644
--- a/drivers/ide/palm_bk3710.c
+++ b/drivers/ide/palm_bk3710.c
@@ -188,10 +188,11 @@ static void palm_bk3710_setpiomode(void __iomem *base, ide_drive_t *mate,
         writel(val32, base + BK3710_REGRCVR);
 }
 
-static void palm_bk3710_set_dma_mode(ide_drive_t *drive, u8 xferspeed)
+static void palm_bk3710_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
         int is_slave = drive->dn & 1;
-        void __iomem *base = (void *)drive->hwif->dma_base;
+        void __iomem *base = (void *)hwif->dma_base;
+        const u8 xferspeed = drive->dma_mode;
 
         if (xferspeed >= XFER_UDMA_0) {
                 palm_bk3710_setudmamode(base, is_slave,
diff --git a/drivers/ide/pdc202xx_new.c b/drivers/ide/pdc202xx_new.c
index 874acd2bb6e6..9546fe2a93f7 100644
--- a/drivers/ide/pdc202xx_new.c
+++ b/drivers/ide/pdc202xx_new.c
@@ -129,11 +129,11 @@ static struct udma_timing {
         { 0x1a, 0x01, 0xcb },   /* UDMA mode 6 */
 };
 
-static void pdcnew_set_dma_mode(ide_drive_t *drive, const u8 speed)
+static void pdcnew_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        ide_hwif_t *hwif        = drive->hwif;
         struct pci_dev *dev     = to_pci_dev(hwif->dev);
         u8 adj                  = (drive->dn & 1) ? 0x08 : 0x00;
+        const u8 speed          = drive->dma_mode;
 
         /*
          * IDE core issues SETFEATURES_XFER to the drive first (thanks to
diff --git a/drivers/ide/pdc202xx_old.c b/drivers/ide/pdc202xx_old.c
index 402aab7f3baa..07cd37516ba6 100644
--- a/drivers/ide/pdc202xx_old.c
+++ b/drivers/ide/pdc202xx_old.c
@@ -21,11 +21,11 @@
 
 #define DRV_NAME "pdc202xx_old"
 
-static void pdc202xx_set_mode(ide_drive_t *drive, const u8 speed)
+static void pdc202xx_set_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        ide_hwif_t *hwif        = drive->hwif;
         struct pci_dev *dev     = to_pci_dev(hwif->dev);
         u8 drive_pci            = 0x60 + (drive->dn << 2);
+        const u8 speed          = drive->dma_mode;
 
         u8                      AP = 0, BP = 0, CP = 0;
         u8                      TA = 0, TB = 0, TC = 0;
@@ -78,7 +78,8 @@ static void pdc202xx_set_mode(ide_drive_t *drive, const u8 speed)
 
 static void pdc202xx_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        pdc202xx_set_mode(drive, drive->pio_mode);
+        drive->dma_mode = drive->pio_mode;
+        pdc202xx_set_mode(hwif, drive);
 }
 
 static int pdc202xx_test_irq(ide_hwif_t *hwif)
diff --git a/drivers/ide/piix.c b/drivers/ide/piix.c
index 64b3041daa60..1bdca49e5a03 100644
--- a/drivers/ide/piix.c
+++ b/drivers/ide/piix.c
@@ -127,16 +127,15 @@ static void piix_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 
 /**
  *      piix_set_dma_mode       -       set host controller for DMA mode
+ *      @hwif: port
  *      @drive: drive
- *      @speed: DMA mode
  *
  *      Set a PIIX host controller to the desired DMA mode.  This involves
  *      programming the right timing data into the PCI configuration space.
  */
 
-static void piix_set_dma_mode(ide_drive_t *drive, const u8 speed)
+static void piix_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        ide_hwif_t *hwif        = drive->hwif;
         struct pci_dev *dev     = to_pci_dev(hwif->dev);
         u8 maslave              = hwif->channel ? 0x42 : 0x40;
         int a_speed             = 3 << (drive->dn * 4);
@@ -147,6 +146,7 @@ static void piix_set_dma_mode(ide_drive_t *drive, const u8 speed)
         int                     sitre;
         u16                     reg4042, reg4a;
         u8                      reg48, reg54, reg55;
+        const u8 speed          = drive->dma_mode;
 
         pci_read_config_word(dev, maslave, &reg4042);
         sitre = (reg4042 & 0x4000) ? 1 : 0;
diff --git a/drivers/ide/pmac.c b/drivers/ide/pmac.c
index a167968a2d42..9fae1fb1468b 100644
--- a/drivers/ide/pmac.c
+++ b/drivers/ide/pmac.c
@@ -777,14 +777,14 @@ set_timings_mdma(ide_drive_t *drive, int intf_type, u32 *timings, u32 *timings2,
 #endif  
 }
 
-static void pmac_ide_set_dma_mode(ide_drive_t *drive, const u8 speed)
+static void pmac_ide_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        ide_hwif_t *hwif = drive->hwif;
         pmac_ide_hwif_t *pmif =
                 (pmac_ide_hwif_t *)dev_get_drvdata(hwif->gendev.parent);
         int ret = 0;
         u32 *timings, *timings2, tl[2];
         u8 unit = drive->dn & 1;
+        const u8 speed = drive->dma_mode;
 
         timings = &pmif->timings[unit];
         timings2 = &pmif->timings[unit+2];
diff --git a/drivers/ide/sc1200.c b/drivers/ide/sc1200.c
index bb0166e460ab..134f1fd13866 100644
--- a/drivers/ide/sc1200.c
+++ b/drivers/ide/sc1200.c
@@ -122,13 +122,13 @@ out:
         return mask;
 }
 
-static void sc1200_set_dma_mode(ide_drive_t *drive, const u8 mode)
+static void sc1200_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        ide_hwif_t              *hwif = drive->hwif;
         struct pci_dev          *dev = to_pci_dev(hwif->dev);
         unsigned int            reg, timings;
         unsigned short          pci_clock;
         unsigned int            basereg = hwif->channel ? 0x50 : 0x40;
+        const u8                mode = drive->dma_mode;
 
         static const u32 udma_timing[3][3] = {
                 { 0x00921250, 0x00911140, 0x00911030 },
diff --git a/drivers/ide/scc_pata.c b/drivers/ide/scc_pata.c
index 23e16e4460ee..e9d4b441d1c3 100644
--- a/drivers/ide/scc_pata.c
+++ b/drivers/ide/scc_pata.c
@@ -231,16 +231,15 @@ static void scc_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 
 /**
  *      scc_set_dma_mode        -       set host controller for DMA mode
+ *      @hwif: port
  *      @drive: drive
- *      @speed: DMA mode
  *
  *      Load the timing settings for this device mode into the
  *      controller.
  */
 
-static void scc_set_dma_mode(ide_drive_t *drive, const u8 speed)
+static void scc_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        ide_hwif_t *hwif = drive->hwif;
         struct scc_ports *ports = ide_get_hwifdata(hwif);
         unsigned long ctl_base = ports->ctl;
         unsigned long cckctrl_port = ctl_base + 0xff0;
@@ -254,6 +253,7 @@ static void scc_set_dma_mode(ide_drive_t *drive, const u8 speed)
         int offset, idx;
         unsigned long reg;
         unsigned long jcactsel;
+        const u8 speed = drive->dma_mode;
 
         reg = in_be32((void __iomem *)cckctrl_port);
         if (reg & CCKCTRL_ATACLKOEN) {
diff --git a/drivers/ide/serverworks.c b/drivers/ide/serverworks.c
index a56bc51ae032..35fb8dabb55d 100644
--- a/drivers/ide/serverworks.c
+++ b/drivers/ide/serverworks.c
@@ -128,14 +128,14 @@ static void svwks_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
         }
 }
 
-static void svwks_set_dma_mode(ide_drive_t *drive, const u8 speed)
+static void svwks_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
         static const u8 udma_modes[]            = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05 };
         static const u8 dma_modes[]             = { 0x77, 0x21, 0x20 };
         static const u8 drive_pci2[]            = { 0x45, 0x44, 0x47, 0x46 };
 
-        ide_hwif_t *hwif        = drive->hwif;
         struct pci_dev *dev     = to_pci_dev(hwif->dev);
+        const u8 speed          = drive->dma_mode;
         u8 unit                 = drive->dn & 1;
 
         u8 ultra_enable  = 0, ultra_timing = 0, dma_timing = 0;
diff --git a/drivers/ide/sgiioc4.c b/drivers/ide/sgiioc4.c
index b7d61dc64096..e3ea591f66d3 100644
--- a/drivers/ide/sgiioc4.c
+++ b/drivers/ide/sgiioc4.c
@@ -255,7 +255,7 @@ static int sgiioc4_dma_end(ide_drive_t *drive)
         return dma_stat;
 }
 
-static void sgiioc4_set_dma_mode(ide_drive_t *drive, const u8 speed)
+static void sgiioc4_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
 }
 
diff --git a/drivers/ide/siimage.c b/drivers/ide/siimage.c
index 97266958f744..2009ac2ff658 100644
--- a/drivers/ide/siimage.c
+++ b/drivers/ide/siimage.c
@@ -289,19 +289,18 @@ static void sil_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 
 /**
  *      sil_set_dma_mode        -       set host controller for DMA mode
+ *      @hwif: port
  *      @drive: drive
- *      @speed: DMA mode
  *
  *      Tune the SiI chipset for the desired DMA mode.
  */
 
-static void sil_set_dma_mode(ide_drive_t *drive, const u8 speed)
+static void sil_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
         static const u8 ultra6[] = { 0x0F, 0x0B, 0x07, 0x05, 0x03, 0x02, 0x01 };
         static const u8 ultra5[] = { 0x0C, 0x07, 0x05, 0x04, 0x02, 0x01 };
         static const u16 dma[]   = { 0x2208, 0x10C2, 0x10C1 };
 
-        ide_hwif_t *hwif        = drive->hwif;
         struct pci_dev *dev     = to_pci_dev(hwif->dev);
         unsigned long base      = (unsigned long)hwif->hwif_data;
         u16 ultra = 0, multi    = 0;
@@ -311,6 +310,7 @@ static void sil_set_dma_mode(ide_drive_t *drive, const u8 speed)
                                                 : (mmio ? 0xB4 : 0x80);
         unsigned long ma        = siimage_seldev(drive, 0x08);
         unsigned long ua        = siimage_seldev(drive, 0x0C);
+        const u8 speed          = drive->dma_mode;
 
         scsc  = sil_ioread8 (dev, base + (mmio ? 0x4A : 0x8A));
         mode  = sil_ioread8 (dev, base + addr_mask);
diff --git a/drivers/ide/sis5513.c b/drivers/ide/sis5513.c
index 5a0192060531..db7f4e761dbc 100644
--- a/drivers/ide/sis5513.c
+++ b/drivers/ide/sis5513.c
@@ -340,8 +340,10 @@ static void sis_program_udma_timings(ide_drive_t *drive, const u8 mode)
                 sis_ata33_program_udma_timings(drive, mode);
 }
 
-static void sis_set_dma_mode(ide_drive_t *drive, const u8 speed)
+static void sis_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
+        const u8 speed = drive->dma_mode;
+
         if (speed >= XFER_UDMA_0)
                 sis_program_udma_timings(drive, speed);
         else
diff --git a/drivers/ide/sl82c105.c b/drivers/ide/sl82c105.c
index 419cd3bc6c84..f21dc2ad7682 100644
--- a/drivers/ide/sl82c105.c
+++ b/drivers/ide/sl82c105.c
@@ -92,11 +92,12 @@ static void sl82c105_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 /*
  * Configure the chipset for DMA mode.
  */
-static void sl82c105_set_dma_mode(ide_drive_t *drive, const u8 speed)
+static void sl82c105_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
         static u16 mwdma_timings[] = {0x0707, 0x0201, 0x0200};
         unsigned long timings = (unsigned long)ide_get_drivedata(drive);
         u16 drv_ctrl;
+        const u8 speed = drive->dma_mode;
 
         drv_ctrl = mwdma_timings[speed - XFER_MW_DMA_0];
 
diff --git a/drivers/ide/slc90e66.c b/drivers/ide/slc90e66.c
index 019777522cd2..864ffe0e26d9 100644
--- a/drivers/ide/slc90e66.c
+++ b/drivers/ide/slc90e66.c
@@ -72,14 +72,14 @@ static void slc90e66_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
         spin_unlock_irqrestore(&slc90e66_lock, flags);
 }
 
-static void slc90e66_set_dma_mode(ide_drive_t *drive, const u8 speed)
+static void slc90e66_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        ide_hwif_t *hwif        = drive->hwif;
         struct pci_dev *dev     = to_pci_dev(hwif->dev);
         u8 maslave              = hwif->channel ? 0x42 : 0x40;
         int sitre = 0, a_speed  = 7 << (drive->dn * 4);
         int u_speed = 0, u_flag = 1 << drive->dn;
         u16                     reg4042, reg44, reg48, reg4a;
+        const u8 speed          = drive->dma_mode;
 
         pci_read_config_word(dev, maslave, &reg4042);
         sitre = (reg4042 & 0x4000) ? 1 : 0;
diff --git a/drivers/ide/tc86c001.c b/drivers/ide/tc86c001.c
index f2cb62bf3f22..e444d24934b3 100644
--- a/drivers/ide/tc86c001.c
+++ b/drivers/ide/tc86c001.c
@@ -13,11 +13,11 @@
 
 #define DRV_NAME "tc86c001"
 
-static void tc86c001_set_mode(ide_drive_t *drive, const u8 speed)
+static void tc86c001_set_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        ide_hwif_t *hwif        = drive->hwif;
         unsigned long scr_port  = hwif->config_data + (drive->dn ? 0x02 : 0x00);
         u16 mode, scr           = inw(scr_port);
+        const u8 speed          = drive->dma_mode;
 
         switch (speed) {
         case XFER_UDMA_4:       mode = 0x00c0; break;
@@ -43,7 +43,8 @@ static void tc86c001_set_mode(ide_drive_t *drive, const u8 speed)
 
 static void tc86c001_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        tc86c001_set_mode(drive, drive->pio_mode);
+        drive->dma_mode = drive->pio_mode;
+        tc86c001_set_mode(hwif, drive);
 }
 
 /*
diff --git a/drivers/ide/triflex.c b/drivers/ide/triflex.c
index d34a7eecdea5..7953447eae0f 100644
--- a/drivers/ide/triflex.c
+++ b/drivers/ide/triflex.c
@@ -34,9 +34,8 @@
 
 #define DRV_NAME "triflex"
 
-static void triflex_set_mode(ide_drive_t *drive, const u8 speed)
+static void triflex_set_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        ide_hwif_t *hwif = drive->hwif;
         struct pci_dev *dev = to_pci_dev(hwif->dev);
         u32 triflex_timings = 0;
         u16 timing = 0;
@@ -44,7 +43,7 @@ static void triflex_set_mode(ide_drive_t *drive, const u8 speed)
 
         pci_read_config_dword(dev, channel_offset, &triflex_timings);
 
-        switch(speed) {
+        switch (drive->dma_mode) {
                 case XFER_MW_DMA_2:
                         timing = 0x0103; 
                         break;
@@ -84,7 +83,8 @@ static void triflex_set_mode(ide_drive_t *drive, const u8 speed)
 
 static void triflex_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        triflex_set_mode(drive, drive->pio_mode);
+        drive->dma_mode = drive->pio_mode;
+        triflex_set_mode(hwif, drive);
 }
 
 static const struct ide_port_ops triflex_port_ops = {
diff --git a/drivers/ide/tx4939ide.c b/drivers/ide/tx4939ide.c
index 5228a4786de5..f210633a3d57 100644
--- a/drivers/ide/tx4939ide.c
+++ b/drivers/ide/tx4939ide.c
@@ -125,10 +125,10 @@ static void tx4939ide_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
         /* tx4939ide_tf_load_fixup() will set the Sys_Ctl register */
 }
 
-static void tx4939ide_set_dma_mode(ide_drive_t *drive, const u8 mode)
+static void tx4939ide_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        ide_hwif_t *hwif = drive->hwif;
         u32 mask, val;
+        const u8 mode = drive->dma_mode;
 
         /* Update Data Transfer Mode for this drive. */
         if (mode >= XFER_UDMA_0)
diff --git a/drivers/ide/via82cxxx.c b/drivers/ide/via82cxxx.c
index 6d995fc9d4f5..6769fe252b07 100644
--- a/drivers/ide/via82cxxx.c
+++ b/drivers/ide/via82cxxx.c
@@ -169,22 +169,22 @@ static void via_set_speed(ide_hwif_t *hwif, u8 dn, struct ide_timing *timing)
 
 /**
  *      via_set_drive           -       configure transfer mode
+ *      @hwif: port
  *      @drive: Drive to set up
- *      @speed: desired speed
  *
  *      via_set_drive() computes timing values configures the chipset to
  *      a desired transfer mode.  It also can be called by upper layers.
  */
 
-static void via_set_drive(ide_drive_t *drive, const u8 speed)
+static void via_set_drive(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        ide_hwif_t *hwif = drive->hwif;
         ide_drive_t *peer = ide_get_pair_dev(drive);
         struct pci_dev *dev = to_pci_dev(hwif->dev);
         struct ide_host *host = pci_get_drvdata(dev);
         struct via82cxxx_dev *vdev = host->host_priv;
         struct ide_timing t, p;
         unsigned int T, UT;
+        const u8 speed = drive->dma_mode;
 
         T = 1000000000 / via_clock;
 
@@ -216,7 +216,8 @@ static void via_set_drive(ide_drive_t *drive, const u8 speed)
 
 static void via_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
-        via_set_drive(drive, drive->pio_mode);
+        drive->dma_mode = drive->pio_mode;
+        via_set_drive(hwif, drive);
 }
 
 static struct via_isa_bridge *via_config_find(struct pci_dev **isa)
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 803ec306883c..53ecdba82d72 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -625,7 +625,7 @@ extern const struct ide_tp_ops default_tp_ops;
 struct ide_port_ops {
         void    (*init_dev)(ide_drive_t *);
         void    (*set_pio_mode)(struct hwif_s *, ide_drive_t *);
-        void    (*set_dma_mode)(ide_drive_t *, const u8);
+        void    (*set_dma_mode)(struct hwif_s *, ide_drive_t *);
         int     (*reset_poll)(ide_drive_t *);
         void    (*pre_reset)(ide_drive_t *);
         void    (*resetproc)(ide_drive_t *);