Hello.
On 07/23/2012 03:46 PM, Denis Turischev wrote:
> Some devices with Intel Panther Point chipset may require switchover
> usb ports from XHCI back to EHCI controller before shutdown.
> Overwise various BIOS bugs related to power management may be
> triggered.
> Signed-off-by: Denis Turischev <denis@xxxxxxxxxxxxxx>
> ---
> drivers/usb/host/pci-quirks.c | 14 ++++++++++++++
> drivers/usb/host/pci-quirks.h | 1 +
> 2 files changed, 15 insertions(+)
> diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
> index df0828c..b19a84a 100644
> --- a/drivers/usb/host/pci-quirks.c
> +++ b/drivers/usb/host/pci-quirks.c
> @@ -800,6 +800,20 @@ void usb_enable_xhci_ports(struct pci_dev *xhci_pdev)
> }
> EXPORT_SYMBOL_GPL(usb_enable_xhci_ports);
>
> +void usb_disable_xhci_ports(struct pci_dev *xhci_pdev)
> +{
> + u32 ports_available;
> +
> + ports_available = 0x0;
Why not make it an initializer? And why do you need the variable at all?
> +
> + pci_write_config_dword(xhci_pdev, USB_INTEL_USB3_PSSEN,
> + cpu_to_le32(ports_available));
cpu_to_le32() not needed.
> +
> + pci_write_config_dword(xhci_pdev, USB_INTEL_XUSB2PR,
> + cpu_to_le32(ports_available));
> +}
> +EXPORT_SYMBOL_GPL(usb_disable_xhci_ports);
> +
> /**
> * PCI Quirks for xHCI.
> *
WBR, Sergei
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