usb: cdns3: gadget: link trb should point to next request

It has marked the dequeue trb as link trb, but its next segment
pointer is still itself, it causes the transfer can't go on. Fix
it by set its pointer as the trb address for the next request.

Fixes: f616c3bda47e ("usb: cdns3: Fix dequeue implementation")
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200219141455.23257-2-peter.chen@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/cdns3/gadget.c b/drivers/usb/cdns3/gadget.c
index 736b0c6e27fe046bfac9b7449b0a8aafefdb0b85..1d8a2af35bb00db107e38a450a5271f47e3753a7 100644 (file)
--- a/drivers/usb/cdns3/gadget.c
+++ b/drivers/usb/cdns3/gadget.c
@@ -2550,7 +2550,7 @@ found:
        /* Update ring only if removed request is on pending_req_list list */
        if (req_on_hw_ring) {
                link_trb->buffer = TRB_BUFFER(priv_ep->trb_pool_dma +
-                                             (priv_req->start_trb * TRB_SIZE));
+                       ((priv_req->end_trb + 1) * TRB_SIZE));
                link_trb->control = (link_trb->control & TRB_CYCLE) |
                                    TRB_TYPE(TRB_LINK) | TRB_CHAIN;