On 11/22/2011 05:14 PM, Alan Stern wrote:
In addition to what Sebastian pointed out, the API is missing a piece.
A gadget driver needs to know whether or not the UDC driver supports SG
operations and how large an SG list may become. There should be a
"sg_max_tablesize" field (or some name like that) added to struct
usb_gadget; if the field is 0 then SG operations aren't supported.
He added that and named it sg_tablesize:
@@ -519,6 +588,7 @@ struct usb_gadget {
struct list_head ep_list; /* of usb_ep */
enum usb_device_speed speed;
enum usb_device_speed max_speed;
+ unsigned sg_tablesize;
> Alan Stern
>
Sebastian
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