Benjamin Herrenschmidt <[EMAIL PROTECTED]> schrieb am 08.08.05 11:14:40:
>
> Can you try tweaking the driver in drivers/ide/ppc/pmac.c, and put this
> code in #if 0 :
>
> /* Get cable type from device-tree */
> if (pmif->kind == controller_kl_ata4 || pmif->kind == controller_un_ata6
> || pmif->kind == controller_k2_ata6
> || pmif->kind == controller_sh_ata6) {
> char* cable = get_property(np, "cable-type", NULL);
> if (cable && !strncmp(cable, "80-", 3))
> pmif->cable_80 = 1;
> }
> /* G5's seem to have incorrect cable type in device-tree. Let's assume
> * they have a 80 conductor cable, this seem to be always the case
> unless
> * the user mucked around
> */
> if (device_is_compatible(np, "K2-UATA") ||
> device_is_compatible(np, "shasta-ata"))
> pmif->cable_80 = 1;
>
> (That is make sure cable_80 is never set to 1)
>
> That will have the effect of slowing down your interface to U/DMA2. Let me
> know if
> that helps.
>
> Ben.
>
Yes, I'll #if 0 this code fragment in pmac_ide_setup_device() and test it.
I guess I need to watch this for a while, since the "DMA disabled" was triggered
only rarely. Please be patient.
Vivenzio
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