On 07/25/2013 05:12 PM, Sebastian Andrzej Siewior wrote: > On 07/25/2013 04:57 PM, Lars-Peter Clausen wrote: >> I'm not sure that this will work. Once you've submitted the descriptor it is >> owned by the dmaengine driver and you are not allowed to dereference it >> anymore since the dmaengine driver might free the memory at any time. You >> should only reference the descriptor by the cookie returned by submit(). > > I see. But it can't be reused before calling the callback if it is > going to call the callback, right? > So if this is a no-no, I'm left with an additional argument to the > complete callback? Hm, maybe using dmaengine_tx_status() and checking the residue field of the state struct. transferred is basically len - residue. -- 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
