On Mon, 25 Aug 2014, vichy wrote: > hi Oliver: > > 2014-08-25 18:21 GMT+08:00 Oliver Neukum <oneukum@xxxxxxx>: > > On Fri, 2014-08-22 at 14:23 -0400, Alan Stern wrote: > >> On Sat, 23 Aug 2014, vichy wrote: > >> > >> > from your patch, I have some questions: > >> > a. in Alan's version, if both HID_CLEAR_HALT and HID_RESET_PENDING are > >> > set, hid_reset will both "clear ep halt" and "reset devcie". > >> > But in original one, even HID_CLEAR_HALT and HID_RESET_PENDING are > >> > both set, hid_reset only do one of them. > >> > >> Yes. In my patch, the clear-halt handler will turn on the > >> HID_RESET_PENDING bit if something goes wrong. In that case we want to > >> do both things. > > > > Why? If we reset, why bother clearing a halt? Especially as this > > may mean waiting the full 5 seconds for a timeout. > I think what Alan mean is IF CLEAR HALT fail, we reset the device. > That is what below "In that case" mean. > "In that case we want to do both things." Exactly. Suppose initially HID_CLEAR_HALT is set and HID_RESET_PENDING is off. If the usb_clear_halt call fails, we want to recover by performing a reset. 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
