Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756846AbaF1S06 (ORCPT ); Sat, 28 Jun 2014 14:26:58 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:53941 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755687AbaF1RvG (ORCPT ); Sat, 28 Jun 2014 13:51:06 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Johannes Stezenbach , Felipe Balbi Subject: [PATCH 3.15 017/139] usb: dwc3: gadget: clear stall when disabling endpoint Date: Sat, 28 Jun 2014 10:46:18 -0700 Message-Id: <20140628174606.161085495@linuxfoundation.org> X-Mailer: git-send-email 2.0.1 In-Reply-To: <20140628174605.352098823@linuxfoundation.org> References: <20140628174605.352098823@linuxfoundation.org> User-Agent: quilt/0.63-1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.15-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: Greg Kroah-Hartman --- drivers/usb/dwc3/gadget.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -604,6 +604,10 @@ static int __dwc3_gadget_ep_disable(stru 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); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/