On Thu, 18 Feb 2016, Daniel Fraga wrote:
> On Thu, 18 Feb 2016 14:30:15 -0500 (EST)
> Alan Stern <[email protected]> wrote:
>
> > It looks like there's some problem in the usbhid driver. Apparently
> > hid_start_in() gets some sort of error when it submits the input URB,
> > because that URB doesn't show up in the usbmon output.
> >
> > Can you add a debugging line near the end of hid_post_reset() in
> > drivers/hid/usbhid/hid-core.c to find out what the return value from
> > hid_start_in() is?
>
> Yes, can you provide the patch (or the specific line you need)
> so I can recompile it?
Something like the patch below (untested).
Alan Stern
Index: usb-4.4/drivers/hid/usbhid/hid-core.c
===================================================================
--- usb-4.4.orig/drivers/hid/usbhid/hid-core.c
+++ usb-4.4/drivers/hid/usbhid/hid-core.c
@@ -1458,6 +1458,7 @@ static int hid_post_reset(struct usb_int
spin_unlock_irq(&usbhid->lock);
hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
status = hid_start_in(hid);
+ dev_info(&intf->dev, "post reset hid_start_in -> %d\n", status);
if (status < 0)
hid_io_error(hid);
usbhid_restart_queues(usbhid);
--
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