On Mon, 20 Feb 2012, Amit Nagal wrote: > Hi , > > Documentation/usb/error-codes.txt defines -ETIMEDOUT as follows : > > Synchronous USB message functions use this code to indicate timeout > expired before the transfer completed, > and no other error was reported by HC. > > This definition applies to Syncronous USB functions like usb_control_msg() . > > but how to indicate timeout or -ETIMEDOUT condition for usb requests > submitted via asynchronous usb_submit_urb() call . > if a usb driver submits urb via usb_submit_urb() call and wants to > have some timeout for its completion ( say 5s and driver be notified > with -ETIMEDOUT in urb completion callback after a interval of 5 > seconds ) , is it possible with asynchronous urb submission calls ? No, it is not possible. If a driver wants to do this, it has to set up its own timer and do everything itself. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
