From patchwork Tue Jun 8 14:58:23 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Colin King X-Patchwork-Id: 12307119 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 4943BC47082 for ; Tue, 8 Jun 2021 14:58:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 34D7861183 for ; Tue, 8 Jun 2021 14:58:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233726AbhFHPAV (ORCPT ); Tue, 8 Jun 2021 11:00:21 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:37430 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233540AbhFHPAT (ORCPT ); Tue, 8 Jun 2021 11:00:19 -0400 Received: from 1.general.cking.uk.vpn ([10.172.193.212] helo=localhost) by youngberry.canonical.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.93) (envelope-from ) id 1lqdBP-0003XW-MY; Tue, 08 Jun 2021 14:58:23 +0000 From: Colin King To: "David S . Miller" , Jakub Kicinski , Oleksij Rempel , linux-usb@vger.kernel.org, netdev@vger.kernel.org Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH][next] net: usb: asix: ax88772: Fix less than zero comparison of a u16 Date: Tue, 8 Jun 2021 15:58:23 +0100 Message-Id: <20210608145823.159467-1-colin.king@canonical.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: Colin Ian King The comparison of the u16 priv->phy_addr < 0 is always false because phy_addr is unsigned. Fix this by assigning the return from the call to function asix_read_phy_addr to int ret and using this for the less than zero error check comparison. Addresses-Coverity: ("Unsigned compared against 0") Fixes: e532a096be0e ("net: usb: asix: ax88772: add phylib support") Signed-off-by: Colin Ian King --- drivers/net/usb/asix_devices.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/net/usb/asix_devices.c b/drivers/net/usb/asix_devices.c index 57dafb3262d9..211c5a87eb15 100644 --- a/drivers/net/usb/asix_devices.c +++ b/drivers/net/usb/asix_devices.c @@ -704,9 +704,10 @@ static int ax88772_init_phy(struct usbnet *dev) struct asix_common_private *priv = dev->driver_priv; int ret; - priv->phy_addr = asix_read_phy_addr(dev, true); - if (priv->phy_addr < 0) + ret = asix_read_phy_addr(dev, true); + if (ret < 0) return priv->phy_addr; + priv->phy_addr = ret; snprintf(priv->phy_name, sizeof(priv->phy_name), PHY_ID_FMT, priv->mdio->id, priv->phy_addr);