From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964906AbaGOW1u (ORCPT ); Tue, 15 Jul 2014 18:27:50 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:53855 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757925AbaGOVbY (ORCPT ); Tue, 15 Jul 2014 17:31:24 -0400 From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Felipe Balbi , Kamal Mostafa Subject: [PATCH 3.13 010/198] usb: dwc3: gadget: clear stall when disabling endpoint Date: Tue, 15 Jul 2014 14:28:00 -0700 Message-Id: <1405459868-15089-11-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1405459868-15089-1-git-send-email-kamal@canonical.com> References: <1405459868-15089-1-git-send-email-kamal@canonical.com> X-Extended-Stable: 3.13 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.13.11.5 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Felipe Balbi commit 687ef9817df7ed960d14575b9033dde3d04631fe upstream. so it seems like DWC3 IP doesn't clear stalls automatically when we disable an endpoint, because of that, we _must_ make sure stalls are cleared before clearing the proper bit in DALEPENA register. Reported-by: Johannes Stezenbach Signed-off-by: Felipe Balbi Signed-off-by: Kamal Mostafa --- drivers/usb/dwc3/gadget.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 02e44fc..c37da0c 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -586,6 +586,10 @@ static int __dwc3_gadget_ep_disable(struct dwc3_ep *dep) dwc3_remove_requests(dwc, dep); + /* make sure HW endpoint isn't stalled */ + if (dep->flags & DWC3_EP_STALL) + __dwc3_gadget_ep_set_halt(dep, 0); + reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); reg &= ~DWC3_DALEPENA_EP(dep->number); dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); -- 1.9.1