From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from out1-smtp.messagingengine.com ([66.111.4.25]:38630 "EHLO out1-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965020AbdAIKu6 (ORCPT ); Mon, 9 Jan 2017 05:50:58 -0500 Subject: FAILED: patch "[PATCH] usb: dwc3: gadget: always unmap EP0 requests" failed to apply to 4.9-stable tree To: felipe.balbi@linux.intel.com, januszx.dziedzic@linux.intel.com, stable@vger.kernel.org, tomaszx.medrek@intel.com Cc: From: Date: Mon, 09 Jan 2017 11:50:01 +0100 Message-ID: <1483959001138151@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >>From d62145929992f331fdde924d5963ab49588ccc7d Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Tue, 20 Dec 2016 14:14:40 +0200 Subject: [PATCH] usb: dwc3: gadget: always unmap EP0 requests commit 0416e494ce7d ("usb: dwc3: ep0: correct cache sync issue in case of ep0_bounced") introduced a bug where we would leak DMA resources which would cause us to starve the system of them resulting in failing DMA transfers. Fix the bug by making sure that we always unmap EP0 requests since those are *always* mapped. Fixes: 0416e494ce7d ("usb: dwc3: ep0: correct cache sync issue in case of ep0_bounced") Cc: Tested-by: Tomasz Medrek Reported-by: Janusz Dziedzic Signed-off-by: Felipe Balbi diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index efddaf5d11d1..0286e3141864 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -180,11 +180,11 @@ void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req, if (req->request.status == -EINPROGRESS) req->request.status = status; - if (dwc->ep0_bounced && dep->number == 0) + if (dwc->ep0_bounced && dep->number <= 1) dwc->ep0_bounced = false; - else - usb_gadget_unmap_request_by_dev(dwc->sysdev, - &req->request, req->direction); + + usb_gadget_unmap_request_by_dev(dwc->sysdev, + &req->request, req->direction); trace_dwc3_gadget_giveback(req);