From patchwork Fri Aug 4 08:49:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jimmy Hu X-Patchwork-Id: 13341510 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 DD1D8C001DB for ; Fri, 4 Aug 2023 08:50:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229797AbjHDIt7 (ORCPT ); Fri, 4 Aug 2023 04:49:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42632 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229726AbjHDItg (ORCPT ); Fri, 4 Aug 2023 04:49:36 -0400 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1B39449FC for ; Fri, 4 Aug 2023 01:49:34 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id 3f1490d57ef6-d27ac992539so1923308276.3 for ; Fri, 04 Aug 2023 01:49:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1691138973; x=1691743773; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=gVdby9fmLEkjJnkZzSNTGr6ljGbqKt84vW1JgbQNcjk=; b=S+6Q8/L0x65Y2p1fWi+U0baqtQXkFAKPoqTJpBmC1V9/bMyOfVBCjqu+wC72cLPs3P Zdr6lcvQ+01L/Xv+xTqL/O64ZSDbiVoWt0wnHU0ALucGt1pBYDtwumgfzPaZ4oSIcpS6 klvxBMI+Cm7nw/kpDf3mDcd9o3kJZRVsWjCBn70mJFv5xv590tCM6/A4UD9oA/hGtJ26 ptagvhH4cSHXNmZvnVcR++dIw/mmUTnZRXoGDW/3CToGkTz5vafVHbY6x4HE8MEDuQ1w Uioo+dCxZAUFlq60/bg/g+scdsTHuKZiU3t4dpVp/0EkrwtlxSyOt2w5Or/3LT3Dd6Re Jj0g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691138973; x=1691743773; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=gVdby9fmLEkjJnkZzSNTGr6ljGbqKt84vW1JgbQNcjk=; b=DItH4C/9qpx6fmCsGvEeS/xS5F0klMpmBD0ofcOZGlT0fQw/FHX+QNsFe/2MNe/MWd OSyFf3N059amhjQUV5p/0hC60CNNUZr1lzcK7HTTdrIBc8Zq6/yp1q5Z6Ubv1/0ryUI1 AatTDGU5wf7vkBbZfUQqUN6xm6bvlIHkIShDy7mKwciSDWF+NhMfqQ3C4tRjOELLAPY8 edHDzGpgtd+1QADV4TBjZESmctVj/FR/6ZjqFv+hr8ZkY4t9MXC9IPclHnXANEfFYeH2 0PEQhkcXA4MqBsMG3nMHlLJIBuh5HYUe/74Sfa0CpzZ3JjbnCHu9W7cwwKAHD84RGNw/ P6WQ== X-Gm-Message-State: AOJu0Ywg85l7Q7cE9+049YXGoCkl3baKfk4rSCsqCEq8+d3nmJxFlBc6 BbqJzlxpyJe3uHaMxHlI4/JbS2yAGzU= X-Google-Smtp-Source: AGHT+IF1vKvv6JSxcEWnimybXppg+eoe3zGd/l8LH8Ur4fREiz8+FhnlY8Znc8hLrTDTkj3P1dEFTa4ZkR0= X-Received: from hhhuuu.c.googlers.com ([fda3:e722:ac3:cc00:3:22c1:c0a8:c80]) (user=hhhuuu job=sendgmr) by 2002:a05:6902:1363:b0:d0d:cce3:d32d with SMTP id bt3-20020a056902136300b00d0dcce3d32dmr4670ybb.6.1691138973340; Fri, 04 Aug 2023 01:49:33 -0700 (PDT) Date: Fri, 4 Aug 2023 08:49:28 +0000 Mime-Version: 1.0 X-Mailer: git-send-email 2.41.0.585.gd2178a4bd4-goog Message-ID: <20230804084928.1153600-1-hhhuuu@google.com> Subject: [PATCH v2] usb: typec: tcpm: IS_ERR_OR_NULL check for port->partner From: Jimmy Hu To: linux@roeck-us.net, heikki.krogerus@linux.intel.com, gregkh@linuxfoundation.org Cc: kyletso@google.com, badhri@google.com, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Jimmy Hu Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org port->partner may be an error or NULL, so we must check it with IS_ERR_OR_NULL() before dereferencing it. Move the check to the beginning of the tcpm_handle_vdm_request function. Fixes: 5e1d4c49fbc8 ("usb: typec: tcpm: Determine common SVDM Version") Signed-off-by: Jimmy Hu --- drivers/usb/typec/tcpm/tcpm.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index 829d75ebab42..2c6a0af155ab 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -1683,10 +1683,6 @@ static int tcpm_pd_svdm(struct tcpm_port *port, struct typec_altmode *adev, (VDO_SVDM_VERS(typec_get_negotiated_svdm_version(typec))); break; case CMDT_RSP_ACK: - /* silently drop message if we are not connected */ - if (IS_ERR_OR_NULL(port->partner)) - break; - tcpm_ams_finish(port); switch (cmd) { @@ -1792,6 +1788,12 @@ static void tcpm_handle_vdm_request(struct tcpm_port *port, u32 response[8] = { }; int i, rlen = 0; + /* silently drop message if we are not connected */ + if (IS_ERR_OR_NULL(port->partner)) { + dev_warn(port->dev, "port partner is an error or NULL\n"); + return; + } + for (i = 0; i < cnt; i++) p[i] = le32_to_cpu(payload[i]);