On Mon, Jul 16, 2012 at 07:46:06PM +0300, Denis Turischev wrote:
> Intense-PC is Compulab's mini-desktop with Intel Panther Point
> chipset.
>
> Unconditional ports switching provided by function
> usb_enable_xhci_ports() leads to surprising results, after shutdown
> system powered-on again after a few seconds. On Windows power
> related problems were not observed.
Do you have wake on lan enabled in the BIOS? I have heard reports from
other users that this is a BIOS bug triggered by WOL.
> The patch avoids ports switching for Intense-PC.
>
> Signed-off-by: Denis Turischev <denis@xxxxxxxxxxxxxx>
> ---
> drivers/usb/host/pci-quirks.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
> index df0828c..6f72593 100644
> --- a/drivers/usb/host/pci-quirks.c
> +++ b/drivers/usb/host/pci-quirks.c
> @@ -759,6 +759,13 @@ void usb_enable_xhci_ports(struct pci_dev *xhci_pdev)
> {
> u32 ports_available;
>
> + const char *brd_name;
> + brd_name = dmi_get_system_info(DMI_BOARD_NAME);
> +
> + /* quirk for Compulab's Intense-PC board */
> + if (brd_name && strstr(brd_name, "Intense-PC"))
> + return;
> +
No, this fix is not acceptable. You won't get USB 3.0 speeds if the
ports are not switched over. Now, we can add a quirk to the xHCI
shutdown function to switch the ports back to EHCI on shutdown. That
might not trigger the BIOS bug.
Sarah Sharp
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