From patchwork Fri Dec 24 03:18:42 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiasheng Jiang X-Patchwork-Id: 12698769 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4FF97C433EF for ; Fri, 24 Dec 2021 03:19:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351023AbhLXDTC (ORCPT ); Thu, 23 Dec 2021 22:19:02 -0500 Received: from smtp25.cstnet.cn ([159.226.251.25]:56336 "EHLO cstnet.cn" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1350989AbhLXDTB (ORCPT ); Thu, 23 Dec 2021 22:19:01 -0500 Received: from localhost.localdomain (unknown [124.16.138.126]) by APP-05 (Coremail) with SMTP id zQCowAAH6RUTPMVhaMXHBA--.3002S2; Fri, 24 Dec 2021 11:18:43 +0800 (CST) From: Jiasheng Jiang To: hminas@synopsys.com, gregkh@linuxfoundation.org Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Jiasheng Jiang Subject: [PATCH] usb: dwc2: host: Check for error map Date: Fri, 24 Dec 2021 11:18:42 +0800 Message-Id: <20211224031842.1564705-1-jiasheng@iscas.ac.cn> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-CM-TRANSID: zQCowAAH6RUTPMVhaMXHBA--.3002S2 X-Coremail-Antispam: 1UD129KBjvJXoW7ZrWDZF1fCF4UWF45JFW7XFb_yoW8Gr45p3 yUKFyFkF1Utrn2vw45tF98XFyrJan3X3sFkrW7C39Y9ws5Xr45GrnxGas8XrW5tF92k3Wa kF47Ar1rCF45JFJanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUkG14x267AKxVWUJVW8JwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK02 1l84ACjcxK6xIIjxv20xvE14v26ryj6F1UM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26F4j 6r4UJwA2z4x0Y4vEx4A2jsIE14v26F4UJVW0owA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_Cr 1j6rxdM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj 6xIIjxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVW8JVWxJwAm72CE4IkC6x0Yz7v_Jr 0_Gr1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7MxkIecxEwVAFwVW8 GwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r 1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_JF0_Jw1lIxkGc2Ij 64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Jr 0_Gr1lIxAIcVCF04k26cxKx2IYs7xG6rWUJVWrZr1UMIIF0xvEx4A2jsIE14v26r1j6r4U MIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x0JU0NtcUUU UU= X-Originating-IP: [124.16.138.126] X-CM-SenderInfo: pmld2xxhqjqxpvfd2hldfou0/ Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org For the possible failure of the dma_map_single(), it should be better to check the return map address by using dma_mapping_error() to guarantee the valid of the map address. Fixes: 197ba5f406cc ("Move DWC2 driver out of staging") Signed-off-by: Jiasheng Jiang --- drivers/usb/dwc2/hcd_ddma.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/usb/dwc2/hcd_ddma.c b/drivers/usb/dwc2/hcd_ddma.c index a858b5f9c1d6..89ed93a67c8a 100644 --- a/drivers/usb/dwc2/hcd_ddma.c +++ b/drivers/usb/dwc2/hcd_ddma.c @@ -143,6 +143,7 @@ static void dwc2_desc_list_free(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh) static int dwc2_frame_list_alloc(struct dwc2_hsotg *hsotg, gfp_t mem_flags) { + dma_addr_t addr; if (hsotg->frame_list) return 0; @@ -151,9 +152,13 @@ static int dwc2_frame_list_alloc(struct dwc2_hsotg *hsotg, gfp_t mem_flags) if (!hsotg->frame_list) return -ENOMEM; - hsotg->frame_list_dma = dma_map_single(hsotg->dev, hsotg->frame_list, - hsotg->frame_list_sz, - DMA_TO_DEVICE); + addr = dma_map_single(hsotg->dev, hsotg->frame_list, + hsotg->frame_list_sz, + DMA_TO_DEVICE); + if (dma_mapping_error(hsotg->dev, addr)) + return -ENOMEM; + + hsotg->frame_list_dma = addr; return 0; }