Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Peter Chen <peter.chen@nxp.com>
Subject: [PATCH 5.5 073/189] usb: cdns3: gadget: link trb should point to next request
Date:   Tue, 10 Mar 2020 13:38:30 +0100
Message-Id: <20200310123647.002620209@linuxfoundation.org>
In-Reply-To: <20200310123639.608886314@linuxfoundation.org>
References: <20200310123639.608886314@linuxfoundation.org>
User-Agent: quilt/0.66
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

From: Peter Chen <peter.chen@nxp.com>

commit 8a7c47fb7285b23ca259c888016513d5566fa9e8 upstream.

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>

---
 drivers/usb/cdns3/gadget.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/usb/cdns3/gadget.c
+++ b/drivers/usb/cdns3/gadget.c
@@ -2107,7 +2107,7 @@ 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;