From: Hayes Wang > Support scatter gather and TSO. > > Adjust the tx checksum function and set the max gso size to fix the > size of the tx aggregation buffer. There is little point supporting TSO unless the usb host controller supports arbitrary aligned scatter-gather. All you do is require that a large skb be allocated (that may well fail), and add it another data copy. The xhci controller is almost capable of arbitrary scatter-gather, but it is currently disabled because the data must be aligned at the end of the transfer ring (the hardware designers have made it almost impossible to write efficient software). Note that the various xhci controllers behave subtly differently. David -- 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
