hpt34x: hpt34x_tune_chipset() (->speedproc) fix

* remember to clear reg2 bits for the current device before setting mode
* remove no longer needed hpt34x_clear_chipset()

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

diff --git a/drivers/ide/pci/hpt34x.c b/drivers/ide/pci/hpt34x.c
index ce7b08f..6707f39 100644 (file)
--- a/drivers/ide/pci/hpt34x.c
+++ b/drivers/ide/pci/hpt34x.c
@@ -48,19 +48,6 @@ static u8 hpt34x_ratemask (ide_drive_t *drive)
        return 1;
 }
 
-static void hpt34x_clear_chipset (ide_drive_t *drive)
-{
-       struct pci_dev *dev     = HWIF(drive)->pci_dev;
-       u32 reg1 = 0, tmp1 = 0, reg2 = 0, tmp2 = 0;
-
-       pci_read_config_dword(dev, 0x44, &reg1);
-       pci_read_config_dword(dev, 0x48, &reg2);
-       tmp1 = ((0x00 << (3*drive->dn)) | (reg1 & ~(7 << (3*drive->dn))));
-       tmp2 = (reg2 & ~(0x11 << drive->dn));
-       pci_write_config_dword(dev, 0x44, tmp1);
-       pci_write_config_dword(dev, 0x48, tmp2);
-}
-
 static int hpt34x_tune_chipset (ide_drive_t *drive, u8 xferspeed)
 {
        struct pci_dev *dev     = HWIF(drive)->pci_dev;
@@ -81,7 +68,7 @@ static int hpt34x_tune_chipset (ide_drive_t *drive, u8 xferspeed)
        pci_read_config_dword(dev, 0x44, &reg1);
        pci_read_config_dword(dev, 0x48, &reg2);
        tmp1 = ((lo_speed << (3*drive->dn)) | (reg1 & ~(7 << (3*drive->dn))));
-       tmp2 = ((hi_speed << drive->dn) | reg2);
+       tmp2 = ((hi_speed << drive->dn) | (reg2 & ~(0x11 << drive->dn)));
        pci_write_config_dword(dev, 0x44, tmp1);
        pci_write_config_dword(dev, 0x48, tmp2);
 
@@ -99,7 +86,6 @@ static int hpt34x_tune_chipset (ide_drive_t *drive, u8 xferspeed)
 static void hpt34x_tune_drive (ide_drive_t *drive, u8 pio)
 {
        pio = ide_get_best_pio_mode(drive, pio, 5, NULL);
-       hpt34x_clear_chipset(drive);
        (void) hpt34x_tune_chipset(drive, (XFER_PIO_0 + pio));
 }
 
@@ -117,7 +103,6 @@ static int config_chipset_for_dma (ide_drive_t *drive)
        if (!(speed))
                return 0;
 
-       hpt34x_clear_chipset(drive);
        (void) hpt34x_tune_chipset(drive, speed);
        return ide_dma_enable(drive);
 }