From patchwork Thu May 20 09:23:00 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 445480 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B8244C43462 for ; Thu, 20 May 2021 10:40:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9B3EA60FF3 for ; Thu, 20 May 2021 10:40:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236986AbhETKls (ORCPT ); Thu, 20 May 2021 06:41:48 -0400 Received: from mail.kernel.org ([198.145.29.99]:42054 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238328AbhETKjp (ORCPT ); Thu, 20 May 2021 06:39:45 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 9833961C7E; Thu, 20 May 2021 09:55:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621504530; bh=4+NpStLaTBZCx2bdwMaGYPXOVhxWz6xLxkKaJpEYUIg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IhL+HiKSkQ+FzDXNx2fhlRWCvGsp0tdH3m8YaMM1pP+RJMLsJD91ROoD028p/qRmS NTJ3q/qgl05cGLVcoqzsNtp98Jod3ASSTAFSw50RjxDQBfoW+vpIK244p5LxRiwT7m 4HBcPnKsm5Tz0+5gZv8y37DxFlz4uY+Tm9ih3Y38= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Minas Harutyunyan , Phil Elwell Subject: [PATCH 4.14 288/323] usb: dwc2: Fix gadget DMA unmap direction Date: Thu, 20 May 2021 11:23:00 +0200 Message-Id: <20210520092130.087760061@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210520092120.115153432@linuxfoundation.org> References: <20210520092120.115153432@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Phil Elwell commit 75a41ce46bae6cbe7d3bb2584eb844291d642874 upstream. The dwc2 gadget support maps and unmaps DMA buffers as necessary. When mapping and unmapping it uses the direction of the endpoint to select the direction of the DMA transfer, but this fails for Control OUT transfers because the unmap occurs after the endpoint direction has been reversed for the status phase. A possible solution would be to unmap the buffer before the direction is changed, but a safer, less invasive fix is to remember the buffer direction independently of the endpoint direction. Fixes: fe0b94abcdf6 ("usb: dwc2: gadget: manage ep0 state in software") Acked-by: Minas Harutyunyan Cc: stable Signed-off-by: Phil Elwell Link: https://lore.kernel.org/r/20210506112200.2893922-1-phil@raspberrypi.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/dwc2/core.h | 2 ++ drivers/usb/dwc2/gadget.c | 3 ++- 2 files changed, 4 insertions(+), 1 deletion(-) --- a/drivers/usb/dwc2/core.h +++ b/drivers/usb/dwc2/core.h @@ -166,6 +166,7 @@ struct dwc2_hsotg_req; * @lock: State lock to protect contents of endpoint. * @dir_in: Set to true if this endpoint is of the IN direction, which * means that it is sending data to the Host. + * @map_dir: Set to the value of dir_in when the DMA buffer is mapped. * @index: The index for the endpoint registers. * @mc: Multi Count - number of transactions per microframe * @interval - Interval for periodic endpoints, in frames or microframes. @@ -214,6 +215,7 @@ struct dwc2_hsotg_ep { unsigned short fifo_index; unsigned char dir_in; + unsigned char map_dir; unsigned char index; unsigned char mc; u16 interval; --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -413,7 +413,7 @@ static void dwc2_hsotg_unmap_dma(struct { struct usb_request *req = &hs_req->req; - usb_gadget_unmap_request(&hsotg->gadget, req, hs_ep->dir_in); + usb_gadget_unmap_request(&hsotg->gadget, req, hs_ep->map_dir); } /* @@ -1213,6 +1213,7 @@ static int dwc2_hsotg_map_dma(struct dwc { int ret; + hs_ep->map_dir = hs_ep->dir_in; ret = usb_gadget_map_request(&hsotg->gadget, req, hs_ep->dir_in); if (ret) goto dma_error;