From patchwork Wed Dec 22 10:00:05 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiasheng Jiang X-Patchwork-Id: 12691355 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 EA998C433EF for ; Wed, 22 Dec 2021 10:00:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236205AbhLVKA3 (ORCPT ); Wed, 22 Dec 2021 05:00:29 -0500 Received: from smtp23.cstnet.cn ([159.226.251.23]:42214 "EHLO cstnet.cn" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S234306AbhLVKA3 (ORCPT ); Wed, 22 Dec 2021 05:00:29 -0500 Received: from localhost.localdomain (unknown [124.16.138.126]) by APP-03 (Coremail) with SMTP id rQCowAB3fS0n98JhKilHBA--.38819S2; Wed, 22 Dec 2021 18:00:07 +0800 (CST) From: Jiasheng Jiang To: balbi@kernel.org, gregkh@linuxfoundation.org Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Jiasheng Jiang Subject: [PATCH] usb: gadget: udc: mv_udc_core: Check error dma address Date: Wed, 22 Dec 2021 18:00:05 +0800 Message-Id: <20211222100005.1212589-1-jiasheng@iscas.ac.cn> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-CM-TRANSID: rQCowAB3fS0n98JhKilHBA--.38819S2 X-Coremail-Antispam: 1UD129KBjvdXoW7GryfCFyfGF4xCw1fZr4ktFb_yoWDKFbEkr n8Wr17GFWUKw42gw10qa4YkryF93WkZw4vqF1vyFZ3A34jk3W7Zw4jvF95Wr48uF1UWF9x CwsFkayxZwn7XjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbckFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Ar0_tr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j 6F4UJwA2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oV Cq3wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0 I7IYx2IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r 4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwCY02Avz4vE14v_Gw1l 42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJV WUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r126r1DMIIYrxkI7VAK I48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r1j6r 4UMIIF0xvE42xK8VAvwI8IcIk0rVWrZr1j6s0DMIIF0xvEx4A2jsIE14v26r1j6r4UMIIF 0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x0JUgiSdUUUUU= X-Originating-IP: [124.16.138.126] X-CM-SenderInfo: pmld2xxhqjqxpvfd2hldfou0/ Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Because the dma_map_single() might return error dma address if fails. Therefore it might be better to check the address in order to avoid the use of error dma address in build_dtd() which is called by req_to_dtd(). Fixes: 90fccb529d24 ("usb: gadget: Gadget directory cleanup - group UDC drivers") Signed-off-by: Jiasheng Jiang --- drivers/usb/gadget/udc/mv_udc_core.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/usb/gadget/udc/mv_udc_core.c b/drivers/usb/gadget/udc/mv_udc_core.c index 0fb4ef464321..2613dbdc5aba 100644 --- a/drivers/usb/gadget/udc/mv_udc_core.c +++ b/drivers/usb/gadget/udc/mv_udc_core.c @@ -1472,6 +1472,9 @@ udc_prime_status(struct mv_udc *udc, u8 direction, u16 status, bool empty) req->req.dma = dma_map_single(ep->udc->gadget.dev.parent, req->req.buf, req->req.length, ep_dir(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); + retval = dma_mapping_error(ep->udc->gadget.dev.parent, req->req.dma); + if (retval) + goto out; req->mapped = 1; }