Re: [RFC][PATCH] Reset PCIe devices to address DMA problem on kdumpwith iommu

[Don Dutile]

On 09/14/2012 04:03 PM, Konrad Rzeszutek Wilk wrote:
> > As to the boot parameter to enable this function, you suggested using
> > reset_devices. I found that on a certain platform resetting devices
> > caused PCIe error due to a hardware bug. Therefore I think we need
> > new parameter apart from reset_devices to disable this function on
> > such a machine.
>
> Wouldn't a DMI quirk be better for this? That way the second kernel
> internally would know not to do this.
> --
> To unsubscribe from this list: send the line "unsubscribe linux-pci" in
> the body of a message to majordomo@xxxxxxxxxxxxxxx
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
a DMI quirk for a PCIe switch?  pci-quirk maybe?  there is a hook
in per-device pci reset code path, which could be setup for such
a case.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/