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    SubjectRe: HD DMA disabled in 2.4.21-rc2, works fine in 2.4.20
    Tomas Szepe wrote:
    >>[jwbaker@acm.org]
    >>
    >>I have the same problem on VIA chipset. IDE DMA is disabled in
    >>2.4.21-rc2 but works fine otherwise:
    >
    >
    > Please post the relevant extract of your .config and dmesg output.
    >

    Here's all the information:

    dmesg:
    ------
    ...
    PCI: PCI BIOS revision 2.10 entry at 0xfc06e, last bus=8
    PCI: Using configuration type 1
    PCI: Probing PCI hardware
    Transparent bridge - Intel Corp. 82801BAM/CAM PCI Bridge
    PCI: Using IRQ router PIIX [8086/244c] at 00:1f.0
    ...
    Uniform Multi-Platform E-IDE driver Revision: 7.00beta3-.2.4
    ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
    hda: HITACHI_DK23CA-30, ATA DISK drive
    hdb: TOSHIBA DVD-ROM SD-C2502, ATAPI CD/DVD-ROM drive
    hdc: TOSHIBA CD-RW/DVD-ROM SD-R2102, ATAPI CD/DVD-ROM drive
    ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
    ide1 at 0x170-0x177,0x376 on irq 15
    hda: attached ide-disk driver.
    hda: host protected area => 1
    hda: 58605120 sectors (30006 MB) w/2048KiB Cache, CHS=3648/255/63
    Partition check:
    hda: hda1 hda2 hda3 < hda5 hda6 hda7 hda8 hda9 hda10 >

    .config:
    --------
    ...
    #
    # General setup
    #
    CONFIG_NET=y
    CONFIG_PCI=y
    # CONFIG_PCI_GOBIOS is not set
    # CONFIG_PCI_GODIRECT is not set
    CONFIG_PCI_GOANY=y
    CONFIG_PCI_BIOS=y
    CONFIG_PCI_DIRECT=y
    CONFIG_ISA=y
    CONFIG_PCI_NAMES=y
    # CONFIG_EISA is not set
    # CONFIG_MCA is not set
    CONFIG_HOTPLUG=y
    ...
    #
    # ATA/IDE/MFM/RLL support
    #
    CONFIG_IDE=y

    #
    # IDE, ATA and ATAPI Block devices
    #
    CONFIG_BLK_DEV_IDE=y

    #
    # Please see Documentation/ide.txt for help/info on IDE drives
    #
    # CONFIG_BLK_DEV_HD_IDE is not set
    # CONFIG_BLK_DEV_HD is not set
    CONFIG_BLK_DEV_IDEDISK=y
    CONFIG_IDEDISK_MULTI_MODE=y
    # CONFIG_IDEDISK_STROKE is not set
    # CONFIG_BLK_DEV_IDECS is not set
    CONFIG_BLK_DEV_IDECD=m
    # CONFIG_BLK_DEV_IDETAPE is not set
    CONFIG_BLK_DEV_IDEFLOPPY=m
    CONFIG_BLK_DEV_IDESCSI=m
    # CONFIG_IDE_TASK_IOCTL is not set

    #
    # IDE chipset support/bugfixes
    #
    # CONFIG_BLK_DEV_CMD640 is not set
    # CONFIG_BLK_DEV_CMD640_ENHANCED is not set
    # CONFIG_BLK_DEV_ISAPNP is not set
    CONFIG_BLK_DEV_IDEPCI=y
    CONFIG_BLK_DEV_GENERIC=y
    CONFIG_IDEPCI_SHARE_IRQ=y
    CONFIG_BLK_DEV_IDEDMA_PCI=y
    # CONFIG_BLK_DEV_OFFBOARD is not set
    # CONFIG_BLK_DEV_IDEDMA_FORCED is not set
    CONFIG_IDEDMA_PCI_AUTO=y
    # CONFIG_IDEDMA_ONLYDISK is not set
    CONFIG_BLK_DEV_IDEDMA=y
    # CONFIG_IDEDMA_PCI_WIP is not set
    # CONFIG_BLK_DEV_ADMA100 is not set
    # CONFIG_BLK_DEV_AEC62XX is not set
    # CONFIG_BLK_DEV_ALI15X3 is not set
    # CONFIG_WDC_ALI15X3 is not set
    # CONFIG_BLK_DEV_AMD74XX is not set
    # CONFIG_AMD74XX_OVERRIDE is not set
    # CONFIG_BLK_DEV_CMD64X is not set
    # CONFIG_BLK_DEV_TRIFLEX is not set
    # CONFIG_BLK_DEV_CY82C693 is not set
    # CONFIG_BLK_DEV_CS5530 is not set
    # CONFIG_BLK_DEV_HPT34X is not set
    # CONFIG_HPT34X_AUTODMA is not set
    # CONFIG_BLK_DEV_HPT366 is not set
    # CONFIG_BLK_DEV_PIIX is not set
    # CONFIG_BLK_DEV_NS87415 is not set
    # CONFIG_BLK_DEV_OPTI621 is not set
    # CONFIG_BLK_DEV_PDC202XX_OLD is not set
    # CONFIG_PDC202XX_BURST is not set
    # CONFIG_BLK_DEV_PDC202XX_NEW is not set
    # CONFIG_PDC202XX_FORCE is not set
    # CONFIG_BLK_DEV_RZ1000 is not set
    # CONFIG_BLK_DEV_SC1200 is not set
    # CONFIG_BLK_DEV_SVWKS is not set
    # CONFIG_BLK_DEV_SIIMAGE is not set
    # CONFIG_BLK_DEV_SIS5513 is not set
    # CONFIG_BLK_DEV_SLC90E66 is not set
    # CONFIG_BLK_DEV_TRM290 is not set
    # CONFIG_BLK_DEV_VIA82CXXX is not set
    # CONFIG_IDE_CHIPSETS is not set
    CONFIG_IDEDMA_AUTO=y
    # CONFIG_IDEDMA_IVB is not set
    # CONFIG_DMA_NONPCI is not set
    CONFIG_BLK_DEV_IDE_MODES=y
    # CONFIG_BLK_DEV_ATARAID is not set
    # CONFIG_BLK_DEV_ATARAID_PDC is not set
    # CONFIG_BLK_DEV_ATARAID_HPT is not set
    # CONFIG_BLK_DEV_ATARAID_SII is not set
    ...

    lspci:
    ------
    00:00.0 Host bridge: Intel Corporation 82815 815 Chipset Host Bridge and
    Memory Controller Hub (rev 04)
    00:01.0 PCI bridge: Intel Corporation: Unknown device 1131 (rev 04)
    00:1e.0 PCI bridge: Intel Corporation 82801BA PCI (rev 03)
    00:1f.0 ISA bridge: Intel Corporation 82801BAM ISA Bridge (ICH2) (rev 03)
    00:1f.1 IDE interface: Intel Corporation 82801BAM IDE U100 (rev 03)
    00:1f.2 USB Controller: Intel Corporation 82801BA(M) USB (Hub A) (rev 03)
    01:00.0 VGA compatible controller: nVidia Corporation: Unknown device
    0112 (revb2)
    02:03.0 Multimedia audio controller: ESS Technology ES1983S Maestro-3i
    PCI Audio Accelerator (rev 10)
    02:06.0 PCI bridge: Action Tec Electronics Inc: Unknown device 0100 (rev 11)
    02:0f.0 CardBus bridge: Texas Instruments PCI4451 PC card Cardbus Controller
    02:0f.1 CardBus bridge: Texas Instruments PCI4451 PC card Cardbus Controller
    02:0f.2 FireWire (IEEE 1394): Texas Instruments: Unknown device 8027
    08:04.0 Ethernet controller: Intel Corporation 82557 [Ethernet Pro 100]
    (rev 08)08:08.0 Communication controller: Lucent Microelectronics
    WinModem 56k (rev 01)

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