Hi, On Mon, Dec 22, 2014 at 9:42 PM, Felipe Balbi <balbi@xxxxxx> wrote: > Hi again, > > On Mon, Dec 22, 2014 at 10:11:23AM -0600, Felipe Balbi wrote: >> (please don't top-post) Sure. >> >> On Sun, Dec 14, 2014 at 08:39:18AM +0530, sundeep subbaraya wrote: >> > Hi Paul, >> > >> > As per my understanding, for BULK OUT we do queue a request with 512 >> > bytes length since we do not >> >> sometimes we _do_ know the size. In case of Mass Storage, we _know_ that >> the first bulk out transfer will be 31-bytes (CBW), if we were to start >> a 31-byte transfer, we would't receive anything. >> >> > know the length of the transfer Host is going to send. For Control OUT >> > we know the length in wLength of >> > Setup packet, hence I assumed there is no difference in programming >> > model of Control IN and OUT. >> >> there is _no_ difference. It's just that it was agreed that for anything >> other than control ep, the function drivers would take care of it. See >> the uses of quirk_ep_out_aligned_size. got it..:) > > btw, why are you reimplementing the driver when there's a perfectly good > driver to use in mainline kernel ? I am writing a bare metal driver and it didn't work without alignment check mentioned above. > > -- > balbi Thanks, Sundeep.B.S. -- 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
