On Mon, Jun 24, 2013 at 8:08 PM, Oliver Neukum <[email protected]> wrote: > On Monday 24 June 2013 19:16:43 Ming Lei wrote: >> On Mon, Jun 24, 2013 at 6:28 PM, Oliver Neukum <[email protected]> wrote: >> > On Monday 24 June 2013 17:42:04 Ming Lei wrote: >> >> This patch improves this above situation, and the qh will wait for 5 >> >> milliseconds before being unlinked from hardware, if one URB is submitted >> >> during the period, the qh is move out of unlink wait list and the >> >> interrupt transfer can be scheduled immediately, not like before: the >> >> transfer is only linked to hardware until previous unlink is completed. >> > >> > It seems to me that this logic should be used only if the URB completed >> > without error. >> >> The current completed URB with error doesn't mean the later submitted >> URB will complete with error, so I don't think the logic is related with URB >> completion error. > > But > > a) it is likelier > b) the driver will start error handling > > And what about the bandwidth? At least if you unlink the URB, its bandwidth > should be given back immediately.
Yes, the patch doesn't affect unlinking intr URB because the behavior of start_unlink_intr() isn't changed basically. Thanks, -- Ming Lei -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
