Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f212ff28f08e4ddcef9f25b13463c45cc4204a0c
Commit:     f212ff28f08e4ddcef9f25b13463c45cc4204a0c
Parent:     3160d5416f39da9d9221fec7cb9d64399b706bbc
Author:     Bartlomiej Zolnierkiewicz <[EMAIL PROTECTED]>
AuthorDate: Thu Oct 11 23:53:59 2007 +0200
Committer:  Bartlomiej Zolnierkiewicz <[EMAIL PROTECTED]>
CommitDate: Thu Oct 11 23:53:59 2007 +0200

    ide: move ide_rate_filter() calls to the upper layer (take 2)
    
    * Move ide_rate_filter() calls from host drivers to IDE core.
    
    * Make ide_rate_filter() static.
    
    * Make 'speed' argument of ->speedproc const.
    
    v2:
    * Fix it8213_tune_chipset() comment.
    
    There should be no functionality changes caused by this patch.
    
    Acked-by: Sergei Shtylyov <[EMAIL PROTECTED]>
    Signed-off-by: Bartlomiej Zolnierkiewicz <[EMAIL PROTECTED]>
---
 drivers/ide/arm/icside.c       |    7 +------
 drivers/ide/cris/ide-cris.c    |    4 +---
 drivers/ide/ide-lib.c          |   17 ++++++++---------
 drivers/ide/mips/au1xxx-ide.c  |    4 +---
 drivers/ide/pci/aec62xx.c      |    6 ++----
 drivers/ide/pci/alim15x3.c     |    7 +++----
 drivers/ide/pci/amd74xx.c      |    4 +---
 drivers/ide/pci/atiixp.c       |    8 +++-----
 drivers/ide/pci/cmd64x.c       |    4 +---
 drivers/ide/pci/cs5520.c       |    5 ++---
 drivers/ide/pci/cs5530.c       |    4 +---
 drivers/ide/pci/cs5535.c       |    3 +--
 drivers/ide/pci/hpt34x.c       |    3 +--
 drivers/ide/pci/hpt366.c       |    6 ++----
 drivers/ide/pci/it8213.c       |   10 +++-------
 drivers/ide/pci/it821x.c       |   10 +++-------
 drivers/ide/pci/jmicron.c      |    9 +++------
 drivers/ide/pci/pdc202xx_new.c |    4 +---
 drivers/ide/pci/pdc202xx_old.c |    3 +--
 drivers/ide/pci/piix.c         |    7 +++----
 drivers/ide/pci/sc1200.c       |    4 +---
 drivers/ide/pci/scc_pata.c     |    5 ++---
 drivers/ide/pci/serverworks.c  |    3 +--
 drivers/ide/pci/siimage.c      |   11 ++++-------
 drivers/ide/pci/sis5513.c      |    7 ++-----
 drivers/ide/pci/sl82c105.c     |    4 +---
 drivers/ide/pci/slc90e66.c     |    3 +--
 drivers/ide/pci/tc86c001.c     |    4 +---
 drivers/ide/pci/triflex.c      |    3 +--
 drivers/ide/pci/via82cxxx.c    |    4 +---
 drivers/ide/ppc/pmac.c         |    6 +-----
 include/linux/ide.h            |    3 +--
 32 files changed, 59 insertions(+), 123 deletions(-)

diff --git a/drivers/ide/arm/icside.c b/drivers/ide/arm/icside.c
index 28f910b..99a27f2 100644
--- a/drivers/ide/arm/icside.c
+++ b/drivers/ide/arm/icside.c
@@ -248,15 +248,10 @@ static void icside_build_sglist(ide_drive_t *drive, 
struct request *rq)
  *     MW1     80      50      50      150     C
  *     MW2     70      25      25      120     C
  */
-static int icside_set_speed(ide_drive_t *drive, u8 xfer_mode)
+static int icside_set_speed(ide_drive_t *drive, const u8 xfer_mode)
 {
        int on = 0, cycle_time = 0, use_dma_info = 0;
 
-       /*
-        * Limit the transfer speed to MW_DMA_2.
-        */
-       xfer_mode = ide_rate_filter(drive, xfer_mode);
-
        switch (xfer_mode) {
        case XFER_MW_DMA_2:
                cycle_time = 250;
diff --git a/drivers/ide/cris/ide-cris.c b/drivers/ide/cris/ide-cris.c
index e08782a..67cec89 100644
--- a/drivers/ide/cris/ide-cris.c
+++ b/drivers/ide/cris/ide-cris.c
@@ -722,12 +722,10 @@ static void tune_cris_ide(ide_drive_t *drive, u8 pio)
        (void)ide_config_drive_speed(drive, XFER_PIO_0 + pio);
 }
 
-static int speed_cris_ide(ide_drive_t *drive, u8 speed)
+static int speed_cris_ide(ide_drive_t *drive, const u8 speed)
 {
        int cyc = 0, dvs = 0, strobe = 0, hold = 0;
 
-       speed = ide_rate_filter(drive, speed);
-
        if (speed >= XFER_PIO_0 && speed <= XFER_PIO_4) {
                tune_cris_ide(drive, speed - XFER_PIO_0);
                return ide_config_drive_speed(drive, speed);
diff --git a/drivers/ide/ide-lib.c b/drivers/ide/ide-lib.c
index 41a128f..9576188 100644
--- a/drivers/ide/ide-lib.c
+++ b/drivers/ide/ide-lib.c
@@ -79,7 +79,7 @@ EXPORT_SYMBOL(ide_xfer_verbose);
  *     TODO: check device PIO capabilities
  */
 
-u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
+static u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
 {
        ide_hwif_t *hwif = drive->hwif;
        u8 mode = ide_find_dma_mode(drive, speed);
@@ -96,8 +96,6 @@ u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
        return min(speed, mode);
 }
 
-EXPORT_SYMBOL(ide_rate_filter);
-
 int ide_use_fast_pio(ide_drive_t *drive)
 {
        struct hd_driveid *id = drive->id;
@@ -364,13 +362,14 @@ void ide_toggle_bounce(ide_drive_t *drive, int on)
  
 int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
 {
-#ifndef CONFIG_BLK_DEV_IDEDMA
-       rate = min(rate, (u8) XFER_PIO_4);
-#endif
-       if(HWIF(drive)->speedproc)
-               return HWIF(drive)->speedproc(drive, rate);
-       else
+       ide_hwif_t *hwif = drive->hwif;
+
+       if (hwif->speedproc == NULL)
                return -1;
+
+       rate = ide_rate_filter(drive, rate);
+
+       return hwif->speedproc(drive, rate);
 }
 
 static void ide_dump_opcode(ide_drive_t *drive)
diff --git a/drivers/ide/mips/au1xxx-ide.c b/drivers/ide/mips/au1xxx-ide.c
index 0d5e4c6..b04db9f 100644
--- a/drivers/ide/mips/au1xxx-ide.c
+++ b/drivers/ide/mips/au1xxx-ide.c
@@ -175,13 +175,11 @@ static void auide_tune_drive(ide_drive_t *drive, byte pio)
        ide_config_drive_speed(drive, speed);
 }
 
-static int auide_tune_chipset (ide_drive_t *drive, u8 speed)
+static int auide_tune_chipset(ide_drive_t *drive, const u8 speed)
 {
        int mem_sttime;
        int mem_stcfg;
 
-       speed = ide_rate_filter(drive, speed);
-
        mem_sttime = 0;
        mem_stcfg  = au_readl(MEM_STCFG2);
 
diff --git a/drivers/ide/pci/aec62xx.c b/drivers/ide/pci/aec62xx.c
index 7443283..a827ea2 100644
--- a/drivers/ide/pci/aec62xx.c
+++ b/drivers/ide/pci/aec62xx.c
@@ -87,12 +87,11 @@ static u8 pci_bus_clock_list_ultra (u8 speed, struct 
chipset_bus_clock_list_entr
        return chipset_table->ultra_settings;
 }
 
-static int aec6210_tune_chipset (ide_drive_t *drive, u8 xferspeed)
+static int aec6210_tune_chipset(ide_drive_t *drive, const u8 speed)
 {
        ide_hwif_t *hwif        = HWIF(drive);
        struct pci_dev *dev     = hwif->pci_dev;
        u16 d_conf              = 0;
-       u8 speed                = ide_rate_filter(drive, xferspeed);
        u8 ultra = 0, ultra_conf = 0;
        u8 tmp0 = 0, tmp1 = 0, tmp2 = 0;
        unsigned long flags;
@@ -115,11 +114,10 @@ static int aec6210_tune_chipset (ide_drive_t *drive, u8 
xferspeed)
        return(ide_config_drive_speed(drive, speed));
 }
 
-static int aec6260_tune_chipset (ide_drive_t *drive, u8 xferspeed)
+static int aec6260_tune_chipset(ide_drive_t *drive, const u8 speed)
 {
        ide_hwif_t *hwif        = HWIF(drive);
        struct pci_dev *dev     = hwif->pci_dev;
-       u8 speed        = ide_rate_filter(drive, xferspeed);
        u8 unit         = (drive->select.b.unit & 0x01);
        u8 tmp1 = 0, tmp2 = 0;
        u8 ultra = 0, drive_conf = 0, ultra_conf = 0;
diff --git a/drivers/ide/pci/alim15x3.c b/drivers/ide/pci/alim15x3.c
index 11ecb61..37ecd72 100644
--- a/drivers/ide/pci/alim15x3.c
+++ b/drivers/ide/pci/alim15x3.c
@@ -409,17 +409,16 @@ static u8 ali_udma_filter(ide_drive_t *drive)
 /**
  *     ali15x3_tune_chipset    -       set up chipset/drive for new speed
  *     @drive: drive to configure for
- *     @xferspeed: desired speed
+ *     @speed: desired speed
  *
  *     Configure the hardware for the desired IDE transfer mode.
  *     We also do the needed drive configuration through helpers
  */
- 
-static int ali15x3_tune_chipset (ide_drive_t *drive, u8 xferspeed)
+
+static int ali15x3_tune_chipset(ide_drive_t *drive, const u8 speed)
 {
        ide_hwif_t *hwif        = HWIF(drive);
        struct pci_dev *dev     = hwif->pci_dev;
-       u8 speed                = ide_rate_filter(drive, xferspeed);
        u8 speed1               = speed;
        u8 unit                 = (drive->select.b.unit & 0x01);
        u8 tmpbyte              = 0x00;
diff --git a/drivers/ide/pci/amd74xx.c b/drivers/ide/pci/amd74xx.c
index 3c0bb1e..9abbde3 100644
--- a/drivers/ide/pci/amd74xx.c
+++ b/drivers/ide/pci/amd74xx.c
@@ -234,14 +234,12 @@ static void amd_set_speed(struct pci_dev *dev, unsigned 
char dn, struct ide_timi
  * by upper layers.
  */
 
-static int amd_set_drive(ide_drive_t *drive, u8 speed)
+static int amd_set_drive(ide_drive_t *drive, const u8 speed)
 {
        ide_drive_t *peer = HWIF(drive)->drives + (~drive->dn & 1);
        struct ide_timing t, p;
        int T, UT;
 
-       speed = ide_rate_filter(drive, speed);
-
        if (speed != XFER_PIO_SLOW)
                ide_config_drive_speed(drive, speed);
 
diff --git a/drivers/ide/pci/atiixp.c b/drivers/ide/pci/atiixp.c
index 679eb92..e05e882 100644
--- a/drivers/ide/pci/atiixp.c
+++ b/drivers/ide/pci/atiixp.c
@@ -163,23 +163,21 @@ static void atiixp_tuneproc(ide_drive_t *drive, u8 pio)
 /**
  *     atiixp_tune_chipset     -       tune a ATIIXP interface
  *     @drive: IDE drive to tune
- *     @xferspeed: speed to configure
+ *     @speed: speed to configure
  *
  *     Set a ATIIXP interface channel to the desired speeds. This involves
  *     requires the right timing data into the ATIIXP configuration space
  *     then setting the drive parameters appropriately
  */
 
-static int atiixp_speedproc(ide_drive_t *drive, u8 xferspeed)
+static int atiixp_speedproc(ide_drive_t *drive, const u8 speed)
 {
        struct pci_dev *dev = drive->hwif->pci_dev;
        unsigned long flags;
        int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8;
        u32 tmp32;
        u16 tmp16;
-       u8 speed, pio;
-
-       speed = ide_rate_filter(drive, xferspeed);
+       u8 pio;
 
        if (speed >= XFER_PIO_0 && speed <= XFER_PIO_4) {
                atiixp_tune_pio(drive, speed - XFER_PIO_0);
diff --git a/drivers/ide/pci/cmd64x.c b/drivers/ide/pci/cmd64x.c
index 0e3b5de..5fe50a2 100644
--- a/drivers/ide/pci/cmd64x.c
+++ b/drivers/ide/pci/cmd64x.c
@@ -288,15 +288,13 @@ static void cmd64x_tune_drive (ide_drive_t *drive, u8 pio)
        (void) ide_config_drive_speed(drive, XFER_PIO_0 + pio);
 }
 
-static int cmd64x_tune_chipset (ide_drive_t *drive, u8 speed)
+static int cmd64x_tune_chipset(ide_drive_t *drive, const u8 speed)
 {
        ide_hwif_t *hwif        = HWIF(drive);
        struct pci_dev *dev     = hwif->pci_dev;
        u8 unit                 = drive->dn & 0x01;
        u8 regU = 0, pciU       = hwif->channel ? UDIDETCR1 : UDIDETCR0;
 
-       speed = ide_rate_filter(drive, speed);
-
        if (speed >= XFER_SW_DMA_0) {
                (void) pci_read_config_byte(dev, pciU, &regU);
                regU &= ~(unit ? 0xCA : 0x35);
diff --git a/drivers/ide/pci/cs5520.c b/drivers/ide/pci/cs5520.c
index 5079810..af67438 100644
--- a/drivers/ide/pci/cs5520.c
+++ b/drivers/ide/pci/cs5520.c
@@ -66,16 +66,15 @@ static struct pio_clocks cs5520_pio_clocks[]={
        {1, 2, 1}
 };
 
-static int cs5520_tune_chipset(ide_drive_t *drive, u8 xferspeed)
+static int cs5520_tune_chipset(ide_drive_t *drive, const u8 speed)
 {
        ide_hwif_t *hwif = HWIF(drive);
        struct pci_dev *pdev = hwif->pci_dev;
-       u8 speed = ide_rate_filter(drive, xferspeed);
        int pio = speed;
        u8 reg;
        int controller = drive->dn > 1 ? 1 : 0;
        int error;
-       
+
        switch(speed)
        {
                case XFER_PIO_4:
diff --git a/drivers/ide/pci/cs5530.c b/drivers/ide/pci/cs5530.c
index e5949b1..518f430 100644
--- a/drivers/ide/pci/cs5530.c
+++ b/drivers/ide/pci/cs5530.c
@@ -143,13 +143,11 @@ static int cs5530_config_dma(ide_drive_t *drive)
        return 1;
 }
 
-static int cs5530_tune_chipset(ide_drive_t *drive, u8 mode)
+static int cs5530_tune_chipset(ide_drive_t *drive, const u8 mode)
 {
        unsigned long basereg;
        unsigned int reg, timings = 0;
 
-       mode = ide_rate_filter(drive, mode);
-
        /*
         * Tell the drive to switch to the new mode; abort on failure.
         */
diff --git a/drivers/ide/pci/cs5535.c b/drivers/ide/pci/cs5535.c
index 082ca7d..bc00e7b 100644
--- a/drivers/ide/pci/cs5535.c
+++ b/drivers/ide/pci/cs5535.c
@@ -75,7 +75,7 @@ static unsigned int cs5535_udma_timings[5] =
  *
  *     cs5535_set_speed() configures the chipset to a new speed.
  */
-static void cs5535_set_speed(ide_drive_t *drive, u8 speed)
+static void cs5535_set_speed(ide_drive_t *drive, const u8 speed)
 {
 
        u32 reg = 0, dummy;
@@ -141,7 +141,6 @@ static void cs5535_set_speed(ide_drive_t *drive, u8 speed)
  */
 static int cs5535_set_drive(ide_drive_t *drive, u8 speed)
 {
-       speed = ide_rate_filter(drive, speed);
        ide_config_drive_speed(drive, speed);
        cs5535_set_speed(drive, speed);
 
diff --git a/drivers/ide/pci/hpt34x.c b/drivers/ide/pci/hpt34x.c
index cb8fe56..ba982d6 100644
--- a/drivers/ide/pci/hpt34x.c
+++ b/drivers/ide/pci/hpt34x.c
@@ -43,10 +43,9 @@
 
 #define HPT343_DEBUG_DRIVE_INFO                0
 
-static int hpt34x_tune_chipset (ide_drive_t *drive, u8 xferspeed)
+static int hpt34x_tune_chipset(ide_drive_t *drive, const u8 speed)
 {
        struct pci_dev *dev     = HWIF(drive)->pci_dev;
-       u8 speed = ide_rate_filter(drive, xferspeed);
        u32 reg1= 0, tmp1 = 0, reg2 = 0, tmp2 = 0;
        u8                      hi_speed, lo_speed;
 
diff --git a/drivers/ide/pci/hpt366.c b/drivers/ide/pci/hpt366.c
index 18c8ad0..67127ac 100644
--- a/drivers/ide/pci/hpt366.c
+++ b/drivers/ide/pci/hpt366.c
@@ -600,12 +600,11 @@ static u32 get_speed_setting(u8 speed, struct hpt_info 
*info)
        return (*info->settings)[i];
 }
 
-static int hpt36x_tune_chipset(ide_drive_t *drive, u8 xferspeed)
+static int hpt36x_tune_chipset(ide_drive_t *drive, const u8 speed)
 {
        ide_hwif_t *hwif        = HWIF(drive);
        struct pci_dev  *dev    = hwif->pci_dev;
        struct hpt_info *info   = pci_get_drvdata(dev);
-       u8  speed               = ide_rate_filter(drive, xferspeed);
        u8  itr_addr            = drive->dn ? 0x44 : 0x40;
        u32 old_itr             = 0;
        u32 itr_mask, new_itr;
@@ -628,12 +627,11 @@ static int hpt36x_tune_chipset(ide_drive_t *drive, u8 
xferspeed)
        return ide_config_drive_speed(drive, speed);
 }
 
-static int hpt37x_tune_chipset(ide_drive_t *drive, u8 xferspeed)
+static int hpt37x_tune_chipset(ide_drive_t *drive, const u8 speed)
 {
        ide_hwif_t *hwif        = HWIF(drive);
        struct pci_dev  *dev    = hwif->pci_dev;
        struct hpt_info *info   = pci_get_drvdata(dev);
-       u8  speed               = ide_rate_filter(drive, xferspeed);
        u8  itr_addr            = 0x40 + (drive->dn * 4);
        u32 old_itr             = 0;
        u32 itr_mask, new_itr;
diff --git a/drivers/ide/pci/it8213.c b/drivers/ide/pci/it8213.c
index 70b3245..6fa9557 100644
--- a/drivers/ide/pci/it8213.c
+++ b/drivers/ide/pci/it8213.c
@@ -115,20 +115,16 @@ static void it8213_tuneproc(ide_drive_t *drive, u8 pio)
 /**
  *     it8213_tune_chipset     -       set controller timings
  *     @drive: Drive to set up
- *     @xferspeed: speed we want to achieve
+ *     @speed: speed we want to achieve
  *
- *     Tune the ITE chipset for the desired mode. If we can't achieve
- *     the desired mode then tune for a lower one, but ultimately
- *     make the thing work.
+ *     Tune the ITE chipset for the desired mode.
  */
 
-static int it8213_tune_chipset (ide_drive_t *drive, u8 xferspeed)
+static int it8213_tune_chipset(ide_drive_t *drive, const u8 speed)
 {
-
        ide_hwif_t *hwif        = HWIF(drive);
        struct pci_dev *dev     = hwif->pci_dev;
        u8 maslave              = 0x40;
-       u8 speed                = ide_rate_filter(drive, xferspeed);
        int a_speed             = 3 << (drive->dn * 4);
        int u_flag              = 1 << drive->dn;
        int v_flag              = 0x01 << drive->dn;
diff --git a/drivers/ide/pci/it821x.c b/drivers/ide/pci/it821x.c
index 9286c99..a756e61 100644
--- a/drivers/ide/pci/it821x.c
+++ b/drivers/ide/pci/it821x.c
@@ -405,23 +405,19 @@ static int it821x_dma_end(ide_drive_t *drive)
        return ret;
 }
 
-
 /**
  *     it821x_tune_chipset     -       set controller timings
  *     @drive: Drive to set up
- *     @xferspeed: speed we want to achieve
+ *     @speed: speed we want to achieve
  *
- *     Tune the ITE chipset for the desired mode. If we can't achieve
- *     the desired mode then tune for a lower one, but ultimately
- *     make the thing work.
+ *     Tune the ITE chipset for the desired mode.
  */
 
-static int it821x_tune_chipset (ide_drive_t *drive, byte xferspeed)
+static int it821x_tune_chipset(ide_drive_t *drive, const u8 speed)
 {
 
        ide_hwif_t *hwif        = drive->hwif;
        struct it821x_dev *itdev = ide_get_hwifdata(hwif);
-       u8 speed                = ide_rate_filter(drive, xferspeed);
 
        switch (speed) {
        case XFER_PIO_4:
diff --git a/drivers/ide/pci/jmicron.c b/drivers/ide/pci/jmicron.c
index 17490d2..7bac87f 100644
--- a/drivers/ide/pci/jmicron.c
+++ b/drivers/ide/pci/jmicron.c
@@ -92,17 +92,14 @@ static void jmicron_tuneproc(ide_drive_t *drive, u8 pio)
 /**
  *     jmicron_tune_chipset    -       set controller timings
  *     @drive: Drive to set up
- *     @xferspeed: speed we want to achieve
+ *     @speed: speed we want to achieve
  *
  *     As the JMicron snoops for timings all we actually need to do is
- *     make sure we don't set an invalid mode. We do need to honour
- *     the cable detect here.
+ *     set the transfer mode on the device.
  */
 
-static int jmicron_tune_chipset (ide_drive_t *drive, byte xferspeed)
+static int jmicron_tune_chipset(ide_drive_t *drive, const u8 speed)
 {
-       u8 speed = ide_rate_filter(drive, xferspeed);
-
        return ide_config_drive_speed(drive, speed);
 }
 
diff --git a/drivers/ide/pci/pdc202xx_new.c b/drivers/ide/pci/pdc202xx_new.c
index 7c5544d..3787194 100644
--- a/drivers/ide/pci/pdc202xx_new.c
+++ b/drivers/ide/pci/pdc202xx_new.c
@@ -146,14 +146,12 @@ static struct udma_timing {
        { 0x1a, 0x01, 0xcb },   /* UDMA mode 6 */
 };
 
-static int pdcnew_tune_chipset(ide_drive_t *drive, u8 speed)
+static int pdcnew_tune_chipset(ide_drive_t *drive, const u8 speed)
 {
        ide_hwif_t *hwif        = HWIF(drive);
        u8 adj                  = (drive->dn & 1) ? 0x08 : 0x00;
        int                     err;
 
-       speed = ide_rate_filter(drive, speed);
-
        /*
         * Issue SETFEATURES_XFER to the drive first. PDC202xx hardware will
         * automatically set the timing registers based on 100 MHz PLL output.
diff --git a/drivers/ide/pci/pdc202xx_old.c b/drivers/ide/pci/pdc202xx_old.c
index e19a891..e7a5e30 100644
--- a/drivers/ide/pci/pdc202xx_old.c
+++ b/drivers/ide/pci/pdc202xx_old.c
@@ -63,12 +63,11 @@ static const char *pdc_quirk_drives[] = {
 
 static void pdc_old_disable_66MHz_clock(ide_hwif_t *);
 
-static int pdc202xx_tune_chipset (ide_drive_t *drive, u8 xferspeed)
+static int pdc202xx_tune_chipset(ide_drive_t *drive, const u8 speed)
 {
        ide_hwif_t *hwif        = HWIF(drive);
        struct pci_dev *dev     = hwif->pci_dev;
        u8 drive_pci            = 0x60 + (drive->dn << 2);
-       u8 speed                = ide_rate_filter(drive, xferspeed);
 
        u8                      AP = 0, BP = 0, CP = 0;
        u8                      TA = 0, TB = 0, TC = 0;
diff --git a/drivers/ide/pci/piix.c b/drivers/ide/pci/piix.c
index 5cfa937..b66f9d1 100644
--- a/drivers/ide/pci/piix.c
+++ b/drivers/ide/pci/piix.c
@@ -221,19 +221,18 @@ static void piix_tune_drive (ide_drive_t *drive, u8 pio)
 /**
  *     piix_tune_chipset       -       tune a PIIX interface
  *     @drive: IDE drive to tune
- *     @xferspeed: speed to configure
+ *     @speed: speed to configure
  *
  *     Set a PIIX interface channel to the desired speeds. This involves
  *     requires the right timing data into the PIIX configuration space
  *     then setting the drive parameters appropriately
  */
- 
-static int piix_tune_chipset (ide_drive_t *drive, u8 xferspeed)
+
+static int piix_tune_chipset(ide_drive_t *drive, const u8 speed)
 {
        ide_hwif_t *hwif        = HWIF(drive);
        struct pci_dev *dev     = hwif->pci_dev;
        u8 maslave              = hwif->channel ? 0x42 : 0x40;
-       u8 speed                = ide_rate_filter(drive, xferspeed);
        int a_speed             = 3 << (drive->dn * 4);
        int u_flag              = 1 << drive->dn;
        int v_flag              = 0x01 << drive->dn;
diff --git a/drivers/ide/pci/sc1200.c b/drivers/ide/pci/sc1200.c
index 9bdc969..059071c 100644
--- a/drivers/ide/pci/sc1200.c
+++ b/drivers/ide/pci/sc1200.c
@@ -138,7 +138,7 @@ out:
        return mask;
 }
 
-static int sc1200_tune_chipset(ide_drive_t *drive, u8 mode)
+static int sc1200_tune_chipset(ide_drive_t *drive, const u8 mode)
 {
        ide_hwif_t              *hwif = HWIF(drive);
        int                     unit = drive->select.b.unit;
@@ -146,8 +146,6 @@ static int sc1200_tune_chipset(ide_drive_t *drive, u8 mode)
        unsigned short          pci_clock;
        unsigned int            basereg = hwif->channel ? 0x50 : 0x40;
 
-       mode = ide_rate_filter(drive, mode);
-
        /*
         * Tell the drive to switch to the new mode; abort on failure.
         */
diff --git a/drivers/ide/pci/scc_pata.c b/drivers/ide/pci/scc_pata.c
index eeb0a6d..a19687c 100644
--- a/drivers/ide/pci/scc_pata.c
+++ b/drivers/ide/pci/scc_pata.c
@@ -231,16 +231,15 @@ static void scc_tuneproc(ide_drive_t *drive, u8 pio)
 /**
  *     scc_tune_chipset        -       tune a drive DMA mode
  *     @drive: Drive to set up
- *     @xferspeed: speed we want to achieve
+ *     @speed: speed we want to achieve
  *
  *     Load the timing settings for this device mode into the
  *     controller.
  */
 
-static int scc_tune_chipset(ide_drive_t *drive, byte xferspeed)
+static int scc_tune_chipset(ide_drive_t *drive, const u8 speed)
 {
        ide_hwif_t *hwif = HWIF(drive);
-       u8 speed = ide_rate_filter(drive, xferspeed);
        struct scc_ports *ports = ide_get_hwifdata(hwif);
        unsigned long ctl_base = ports->ctl;
        unsigned long cckctrl_port = ctl_base + 0xff0;
diff --git a/drivers/ide/pci/serverworks.c b/drivers/ide/pci/serverworks.c
index 9fead2e..b51133b 100644
--- a/drivers/ide/pci/serverworks.c
+++ b/drivers/ide/pci/serverworks.c
@@ -145,7 +145,7 @@ static void svwks_tune_pio(ide_drive_t *drive, const u8 pio)
        }
 }
 
-static int svwks_tune_chipset (ide_drive_t *drive, u8 xferspeed)
+static int svwks_tune_chipset(ide_drive_t *drive, const u8 speed)
 {
        static const u8 udma_modes[]            = { 0x00, 0x01, 0x02, 0x03, 
0x04, 0x05 };
        static const u8 dma_modes[]             = { 0x77, 0x21, 0x20 };
@@ -153,7 +153,6 @@ static int svwks_tune_chipset (ide_drive_t *drive, u8 
xferspeed)
 
        ide_hwif_t *hwif        = HWIF(drive);
        struct pci_dev *dev     = hwif->pci_dev;
-       u8 speed                = ide_rate_filter(drive, xferspeed);
        u8 unit                 = (drive->select.b.unit & 0x01);
 
        u8 ultra_enable  = 0, ultra_timing = 0, dma_timing = 0;
diff --git a/drivers/ide/pci/siimage.c b/drivers/ide/pci/siimage.c
index 50f6d17..4c1f3bc 100644
--- a/drivers/ide/pci/siimage.c
+++ b/drivers/ide/pci/siimage.c
@@ -229,14 +229,12 @@ static void sil_tuneproc(ide_drive_t *drive, u8 pio)
 /**
  *     siimage_tune_chipset    -       set controller timings
  *     @drive: Drive to set up
- *     @xferspeed: speed we want to achieve
+ *     @speed: speed we want to achieve
  *
- *     Tune the SII chipset for the desired mode. If we can't achieve
- *     the desired mode then tune for a lower one, but ultimately
- *     make the thing work.
+ *     Tune the SII chipset for the desired mode.
  */
- 
-static int siimage_tune_chipset (ide_drive_t *drive, byte xferspeed)
+
+static int siimage_tune_chipset(ide_drive_t *drive, const u8 speed)
 {
        u8 ultra6[]             = { 0x0F, 0x0B, 0x07, 0x05, 0x03, 0x02, 0x01 };
        u8 ultra5[]             = { 0x0C, 0x07, 0x05, 0x04, 0x02, 0x01 };
@@ -245,7 +243,6 @@ static int siimage_tune_chipset (ide_drive_t *drive, byte 
xferspeed)
        ide_hwif_t *hwif        = HWIF(drive);
        u16 ultra = 0, multi    = 0;
        u8 mode = 0, unit       = drive->select.b.unit;
-       u8 speed                = ide_rate_filter(drive, xferspeed);
        unsigned long base      = (unsigned long)hwif->hwif_data;
        u8 scsc = 0, addr_mask  = ((hwif->channel) ?
                                    ((hwif->mmio) ? 0xF4 : 0x84) :
diff --git a/drivers/ide/pci/sis5513.c b/drivers/ide/pci/sis5513.c
index 1da037f..fed582b 100644
--- a/drivers/ide/pci/sis5513.c
+++ b/drivers/ide/pci/sis5513.c
@@ -531,15 +531,12 @@ static void sis5513_tuneproc(ide_drive_t *drive, u8 pio)
        (void)sis5513_tune_drive(drive, pio);
 }
 
-static int sis5513_tune_chipset (ide_drive_t *drive, u8 xferspeed)
+static int sis5513_tune_chipset(ide_drive_t *drive, const u8 speed)
 {
        ide_hwif_t *hwif        = HWIF(drive);
        struct pci_dev *dev     = hwif->pci_dev;
-
-       u8 drive_pci, reg, speed;
        u32 regdw;
-
-       speed = ide_rate_filter(drive, xferspeed);
+       u8 drive_pci, reg;
 
        /* See config_art_rwp_pio for drive pci config registers */
        drive_pci = 0x40;
diff --git a/drivers/ide/pci/sl82c105.c b/drivers/ide/pci/sl82c105.c
index 0947cab..9f425b0 100644
--- a/drivers/ide/pci/sl82c105.c
+++ b/drivers/ide/pci/sl82c105.c
@@ -113,7 +113,7 @@ static u8 sl82c105_tune_pio(ide_drive_t *drive, u8 pio)
 /*
  * Configure the drive and chipset for a new transfer speed.
  */
-static int sl82c105_tune_chipset(ide_drive_t *drive, u8 speed)
+static int sl82c105_tune_chipset(ide_drive_t *drive, const u8 speed)
 {
        static u16 mwdma_timings[] = {0x0707, 0x0201, 0x0200};
        u16 drv_ctrl;
@@ -121,8 +121,6 @@ static int sl82c105_tune_chipset(ide_drive_t *drive, u8 
speed)
        DBG(("sl82c105_tune_chipset(drive:%s, speed:%s)\n",
             drive->name, ide_xfer_verbose(speed)));
 
-       speed = ide_rate_filter(drive, speed);
-
        switch (speed) {
        case XFER_MW_DMA_2:
        case XFER_MW_DMA_1:
diff --git a/drivers/ide/pci/slc90e66.c b/drivers/ide/pci/slc90e66.c
index 628b066..cc93535 100644
--- a/drivers/ide/pci/slc90e66.c
+++ b/drivers/ide/pci/slc90e66.c
@@ -102,12 +102,11 @@ static void slc90e66_tune_drive (ide_drive_t *drive, u8 
pio)
        (void) ide_config_drive_speed(drive, XFER_PIO_0 + pio);
 }
 
-static int slc90e66_tune_chipset (ide_drive_t *drive, u8 xferspeed)
+static int slc90e66_tune_chipset(ide_drive_t *drive, const u8 speed)
 {
        ide_hwif_t *hwif        = HWIF(drive);
        struct pci_dev *dev     = hwif->pci_dev;
        u8 maslave              = hwif->channel ? 0x42 : 0x40;
-       u8 speed                = ide_rate_filter(drive, xferspeed);
        int sitre = 0, a_speed  = 7 << (drive->dn * 4);
        int u_speed = 0, u_flag = 1 << drive->dn;
        u16                     reg4042, reg44, reg48, reg4a;
diff --git a/drivers/ide/pci/tc86c001.c b/drivers/ide/pci/tc86c001.c
index ec79bac..e542577 100644
--- a/drivers/ide/pci/tc86c001.c
+++ b/drivers/ide/pci/tc86c001.c
@@ -13,14 +13,12 @@
 #include <linux/pci.h>
 #include <linux/ide.h>
 
-static int tc86c001_tune_chipset(ide_drive_t *drive, u8 speed)
+static int tc86c001_tune_chipset(ide_drive_t *drive, const u8 speed)
 {
        ide_hwif_t *hwif        = HWIF(drive);
        unsigned long scr_port  = hwif->config_data + (drive->dn ? 0x02 : 0x00);
        u16 mode, scr           = hwif->INW(scr_port);
 
-       speed = ide_rate_filter(drive, speed);
-
        switch (speed) {
                case XFER_UDMA_4:       mode = 0x00c0; break;
                case XFER_UDMA_3:       mode = 0x00b0; break;
diff --git a/drivers/ide/pci/triflex.c b/drivers/ide/pci/triflex.c
index 098692a..47cf89b 100644
--- a/drivers/ide/pci/triflex.c
+++ b/drivers/ide/pci/triflex.c
@@ -40,7 +40,7 @@
 #include <linux/ide.h>
 #include <linux/init.h>
 
-static int triflex_tune_chipset(ide_drive_t *drive, u8 xferspeed)
+static int triflex_tune_chipset(ide_drive_t *drive, const u8 speed)
 {
        ide_hwif_t *hwif = HWIF(drive);
        struct pci_dev *dev = hwif->pci_dev;
@@ -48,7 +48,6 @@ static int triflex_tune_chipset(ide_drive_t *drive, u8 
xferspeed)
        u16 timing = 0;
        u32 triflex_timings = 0;
        u8 unit = (drive->select.b.unit & 0x01);
-       u8 speed = ide_rate_filter(drive, xferspeed);
        
        pci_read_config_dword(dev, channel_offset, &triflex_timings);
        
diff --git a/drivers/ide/pci/via82cxxx.c b/drivers/ide/pci/via82cxxx.c
index ec9ad6e..e3bf907 100644
--- a/drivers/ide/pci/via82cxxx.c
+++ b/drivers/ide/pci/via82cxxx.c
@@ -158,15 +158,13 @@ static void via_set_speed(ide_hwif_t *hwif, u8 dn, struct 
ide_timing *timing)
  *     by upper layers.
  */
 
-static int via_set_drive(ide_drive_t *drive, u8 speed)
+static int via_set_drive(ide_drive_t *drive, const u8 speed)
 {
        ide_drive_t *peer = HWIF(drive)->drives + (~drive->dn & 1);
        struct via82cxxx_dev *vdev = pci_get_drvdata(drive->hwif->pci_dev);
        struct ide_timing t, p;
        unsigned int T, UT;
 
-       speed = ide_rate_filter(drive, speed);
-
        if (speed != XFER_PIO_SLOW)
                ide_config_drive_speed(drive, speed);
 
diff --git a/drivers/ide/ppc/pmac.c b/drivers/ide/ppc/pmac.c
index 222adcb..284bb7c 100644
--- a/drivers/ide/ppc/pmac.c
+++ b/drivers/ide/ppc/pmac.c
@@ -411,7 +411,6 @@ kauai_lookup_timing(struct kauai_timing* table, int 
cycle_time)
 
 static void pmac_ide_setup_dma(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif);
 static int pmac_ide_build_dmatable(ide_drive_t *drive, struct request *rq);
-static int pmac_ide_tune_chipset(ide_drive_t *drive, u8 speed);
 static void pmac_ide_tuneproc(ide_drive_t *drive, u8 pio);
 static void pmac_ide_selectproc(ide_drive_t *drive);
 static void pmac_ide_kauai_selectproc(ide_drive_t *drive);
@@ -920,16 +919,13 @@ set_timings_mdma(ide_drive_t *drive, int intf_type, u32 
*timings, u32 *timings2,
  * our dedicated function is more precise as it uses the drive provided
  * cycle time value. We should probably fix this one to deal with that too...
  */
-static int
-pmac_ide_tune_chipset (ide_drive_t *drive, byte speed)
+static int pmac_ide_tune_chipset(ide_drive_t *drive, const u8 speed)
 {
        int unit = (drive->select.b.unit & 0x01);
        int ret = 0;
        pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
        u32 *timings, *timings2;
 
-       speed = ide_rate_filter(drive, speed);
-
        if (pmif == NULL)
                return 1;
                
diff --git a/include/linux/ide.h b/include/linux/ide.h
index a3f9c21..81736cb 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -705,7 +705,7 @@ typedef struct hwif_s {
        /* routine to tune PIO mode for drives */
        void    (*tuneproc)(ide_drive_t *, u8);
        /* routine to retune DMA modes for drives */
-       int     (*speedproc)(ide_drive_t *, u8);
+       int     (*speedproc)(ide_drive_t *, const u8);
        /* tweaks hardware to select drive */
        void    (*selectproc)(ide_drive_t *);
        /* chipset polling based on hba specifics */
@@ -1378,7 +1378,6 @@ static inline void ide_set_hwifdata (ide_hwif_t * hwif, 
void *data)
 }
 
 /* ide-lib.c */
-u8 ide_rate_filter(ide_drive_t *, u8);
 extern char *ide_xfer_verbose(u8 xfer_rate);
 extern void ide_toggle_bounce(ide_drive_t *drive, int on);
 extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
-
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