On Wed, 30 Oct 2013, Pratyush Anand wrote: > I read a bit usbmassbulk specification. > What I understood that, host sends a CBW (21 byte bulk out command), > which should start with dCBWSignature 43425355. > > I see that in both pass and fail case host sends a 31 byte bulk out > with signature as DEADBEEF. It is well accepted by Verbatim USb3.0 > disk, which returns a CSW with correct signature 53425355 and tag and > status is passed. f_mass_storage checks for the signature and finds it > wrong so, it wedges the bulk in EP. I think, this is not an issue and > f_mass_storage is doing right here. > > However going further I see that, f_mass_storage is not able to clear > halt condition of bulk in ep after MASS STORAGE RESET and CLEAR > FEATURE (ENDPOINT HALT). In fact this what USB CV log suggests too. That's right. f_mass_storage tries to clear the halt, but dwc3 doesn't actually do it. 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
