* Tony Lindgren <t...@atomide.com> [160920 10:11]:
> * Laurent Pinchart <laurent.pinch...@ideasonboard.com> [160919 23:36]:
> > No, I perform the following steps:
> > 
> > - Connect the panda board to the USB through USB (which powers the board on)
> > - Let the board boot over NFS
> > - Log in as root, run 'reboot'
> > 
> > The second boot produces the warning.
> 
> Oh I was looking at the errors while shutting down things.. OK yeah I get
> that too along with a bunch of DSS related warnings with your .config.
> Probably I did not notice it earlier because of the DSS warnings. Will
> take a look.

The patch below fixes the issue for me, care to give it a try?

If that works for you I'll repost with a proper patch description.

Regards,

Tony

8< ------------------------
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -1255,6 +1255,7 @@ static int musb_gadget_queue(struct usb_ep *ep, struct 
usb_request *req,
 
        map_dma_buffer(request, musb, musb_ep);
 
+       pm_runtime_get_sync(musb->controller);
        spin_lock_irqsave(&musb->lock, lockflags);
 
        /* don't queue if the ep is down */
@@ -1275,6 +1276,9 @@ static int musb_gadget_queue(struct usb_ep *ep, struct 
usb_request *req,
 
 unlock:
        spin_unlock_irqrestore(&musb->lock, lockflags);
+       pm_runtime_mark_last_busy(musb->controller);
+       pm_runtime_put_autosuspend(musb->controller);
+
        return status;
 }
 
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