On Wed, 21 Oct 2015, Steinar H. Gunderson wrote: > On Wed, Oct 21, 2015 at 10:29:11AM -0400, Alan Stern wrote: > >> Is there such a blacklist already, where I can add the devices (there are two > >> distinct IDs behaving identically) and see if it helps? > > There is a blacklist, but it does not affect LPM. See > > drivers/usb/core/quirks.c and include/linux/usb/quirks.h. > > OK, so to blacklist the device for LPM, some new code would need to get > written. Yes. The difficulty is that usb_device_supports_lpm() and usb_set_lpm_parameters() in hub.c are called before usb_detect_quirks(). It would be easier to move the usb_detect_quirks() call into hub_port_init(), before the usb_get_bos_descriptor() and LPM stuff. Then you could simply skip the LPM setup if your quirk was set. 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
