From patchwork Thu May 20 09:20:40 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 444282 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 28702C433B4 for ; Thu, 20 May 2021 10:27:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 09A9E611BD for ; Thu, 20 May 2021 10:27:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236571AbhETK2r (ORCPT ); Thu, 20 May 2021 06:28:47 -0400 Received: from mail.kernel.org ([198.145.29.99]:55902 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236619AbhETK0r (ORCPT ); Thu, 20 May 2021 06:26:47 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id C4D126147E; Thu, 20 May 2021 09:50:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621504224; bh=IytorxOreUp8Y+Emxq6ZQnY9Pd/bPsHNTkJ4zeSfeoA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=P81WJlxv88LCLlyGusC/o1g++Pl41iraavNfmjLS0nyYqkHcDMf5dcYkFqMnMlpqO PgsnBjMAkjmiD3gyXECnCgsdjW78jEkes+ze7PPeWq2EljOAvOcRd6i8KegI8OFK0N lPTP4o64Y8+FfU/zsf1j5mZ/E2r7R/0COggCi9m8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Andy Shevchenko , Sasha Levin Subject: [PATCH 4.14 148/323] usb: gadget: pch_udc: Check for DMA mapping error Date: Thu, 20 May 2021 11:20:40 +0200 Message-Id: <20210520092125.180213614@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: Andy Shevchenko [ Upstream commit 4a28d77e359009b846951b06f7c0d8eec8dce298 ] DMA mapping might fail, we have to check it with dma_mapping_error(). Otherwise DMA-API is not happy: DMA-API: pch_udc 0000:02:02.4: device driver failed to check map error[device address=0x00000000027ee678] [size=64 bytes] [mapped as single] Fixes: abab0c67c061 ("usb: pch_udc: Fixed issue which does not work with g_serial") Signed-off-by: Andy Shevchenko Link: https://lore.kernel.org/r/20210323153626.54908-3-andriy.shevchenko@linux.intel.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/usb/gadget/udc/pch_udc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/gadget/udc/pch_udc.c b/drivers/usb/gadget/udc/pch_udc.c index 1090b846df38..d165c1f67541 100644 --- a/drivers/usb/gadget/udc/pch_udc.c +++ b/drivers/usb/gadget/udc/pch_udc.c @@ -2977,7 +2977,7 @@ static int init_dma_pools(struct pch_udc_dev *dev) dev->dma_addr = dma_map_single(&dev->pdev->dev, ep0out_buf, UDC_EP0OUT_BUFF_SIZE * 4, DMA_FROM_DEVICE); - return 0; + return dma_mapping_error(&dev->pdev->dev, dev->dma_addr); } static int pch_udc_start(struct usb_gadget *g,