On Thu, 10 Jan 2013, Lan Tianyu wrote:
> xhci driver divides the root hub into two logical hubs which work
> respectively for usb 2.0 and usb 3.0 devices. They are independent
> devices in the usb core. But in the ACPI table, it's one device node
> and all usb2.0 and usb3.0 ports are under it. Binding usb port with
> its acpi node needs the raw port number which is reflected in the xhci
> extended capabilities table. This patch is to add find_raw_port_number
> callback to struct hc_driver() and fill it with xhci_find_raw_port_number().
>
> Signed-off-by: Lan Tianyu <tianyu....@intel.com>
> ---
> drivers/usb/core/hcd.c | 9 +++++++++
> drivers/usb/host/xhci-pci.c | 1 +
> drivers/usb/host/xhci.c | 22 ++++++++++++++++++++++
> drivers/usb/host/xhci.h | 1 +
> include/linux/usb/hcd.h | 2 ++
> 5 files changed, 35 insertions(+)
>
> diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
> index 4225d5e..7d695ea 100644
> --- a/drivers/usb/core/hcd.c
> +++ b/drivers/usb/core/hcd.c
> @@ -2364,6 +2364,15 @@ int usb_hcd_is_primary_hcd(struct usb_hcd *hcd)
> }
> EXPORT_SYMBOL_GPL(usb_hcd_is_primary_hcd);
>
> +int usb_hcd_find_raw_port_number(struct usb_hcd *hcd, int port1)
> +{
> + if (!hcd->driver->find_raw_port_number)
> + return port1;
> +
> + return hcd->driver->find_raw_port_number(hcd, port1);
> +}
> +EXPORT_SYMBOL_GPL(usb_hcd_find_raw_port_number);
Does this really need to be EXPORTed? The routine doesn't have any
users outside of usbcore.
Alan Stern
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