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    SubjectRe: Areca RAID driver remaining items?
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    On Iau, 2006-02-23 at 17:50 +0800, erich wrote:
    > But unfortunately I found some mainboards will hang up if I always enable
    > this function in my lab.
    > To avoid this issue, I do an option for this case.
    >
    > But Christoph Hellwig give me comment with it.


    Another thing you can also do for many of these cases is to use either
    the PCI or DMI interfaces to identify the problem board and
    automatically set the option as well.

    There are two ways to do this. One is

    struct pci_dev *bridge_dev = pci_get_slot(pdev->bus, PCI_DEVFN(0,0));
    if(bridge_dev) {
    if(bridge_dev->subsystem_vendor == 0xXXXX &&
    bridge_dev->subsystem_device == 0xXXXX)
    /* Match by svid/sdid for problem boards */

    The other is like this

    #include <linux/dmi.h>

    struct dmi_system_id problem_dmi_table[] = {
    {
    .ident = "Broken Board Name 1",
    .matches = {
    DMI_MATCH(DMI_SYS_VENDOR, "EvilCorp");
    DMI_MATCH(DMI_PRODUCTNAME, "Wombat 1000");
    }
    }
    {
    ditto per board
    },
    { } /* End of list mark
    };


    And then

    if (dmi_system_check(problem_dmi_table))
    disable_msi..


    The DMI code matches on the DMI strings in the ROM BIOS (the ones dumped
    by 'dmidecode')


    An example driver using this interface is drivers/char/sonypi.c which
    uses it to make sure it *is* only run on a sony laptop.

    Alan

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