On Monday 11 August 2008 04:37:30 pm Arjan van de Ven wrote:
>
> From: Arjan van de Ven <arjan@xxxxxxxxxxxxxxx>
> Subject: [PATCH] libata: use a DMI match table to set defaults for port-disable
>
> As suggested by Jeff:
> This patch adds a DMI table that is used for setting defaults for
> the new dont-probe-port parameter boot time optimization feature.
Isn't this the sort of thing we theoretically could learn from ACPI?
I know we haven't really taken advantage of what ACPI tells us about
the presence of legacy devices like COM ports and IDE ports, but
maybe we should.
> +static int __init dmi_disable_ports(const struct dmi_system_id *d)
> +{
> + int value = (unsigned long)d->driver_data;
> +
> + printk(KERN_INFO "libata: DMI match used to disable probing\n");
> + libata_disable_ports |= value;
> + return 0;
> +}
> +
> +#define DMI_PORT_ATA1 (void *)0x1
> +#define DMI_PORT_ATA2 (void *)0x2
> +#define DMI_PORT_ATA3 (void *)0x4
> +#define DMI_PORT_ATA4 (void *)0x8
> +
> +static struct dmi_system_id libata_dmi_table[] __initdata = {
> + /*
> + * The Asus EeePC901 has its devices attached to ATA2 only
> + */
> + {
> + .callback = dmi_disable_ports,
> + .driver_data = DMI_PORT_ATA1,
> + .ident = "Asus EeePC 901",
> + .matches = {
> + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
> + DMI_MATCH(DMI_PRODUCT_NAME, "901"),
> + },
> + },
> + {}
> +};
> +
> +
> /**
> * ata_force_cbl - force cable type according to libata.force
> * @ap: ATA port of interest
> @@ -6126,6 +6158,7 @@ static void __init ata_parse_force_param(void)
> static int __init ata_init(void)
> {
> ata_parse_force_param();
> + dmi_check_system(libata_dmi_table);
>
> ata_wq = create_workqueue("ata");
> if (!ata_wq)
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