On Sun, Dec 09 2007, Marco Gatti wrote:
> Jens Axboe schrieb:
> >
> >Was just thinking that, this should do the trick. If this works, then we
> >can look at whether this is a hardware or iommu or block bouncing
> >(unlikely, would affect more people) bug.
> >
> >diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
> >index 4688dbf..cad3cbc 100644
> >--- a/drivers/ata/ahci.c
> >+++ b/drivers/ata/ahci.c
> >@@ -623,6 +623,9 @@ static void ahci_save_initial_config(struct pci_dev
> >*pdev,
> > hpriv->saved_cap = cap = readl(mmio + HOST_CAP);
> > hpriv->saved_port_map = port_map = readl(mmio + HOST_PORTS_IMPL);
> >
> >+ hpriv->saved_cap &= ~HOST_CAP_64;
> >+ cap &= ~HOST_CAP_64;
> >+
> > /* some chips have errata preventing 64bit use */
> > if ((cap & HOST_CAP_64) && (hpriv->flags & AHCI_HFLAG_32BIT_ONLY)) {
> > dev_printk(KERN_INFO, &pdev->dev,
> >
>
> Hello Jens,
> Thanks for help. I just applied the patch. Unfortunately it doesn't work.
Can you try and additionally boot with iommu=off as a boot parameter?
--
Jens Axboe
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