From patchwork Tue Dec 21 20:10:43 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pavel Skripkin X-Patchwork-Id: 527648 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 4318FC433EF for ; Tue, 21 Dec 2021 20:10:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232797AbhLUUKt (ORCPT ); Tue, 21 Dec 2021 15:10:49 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41520 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232272AbhLUUKs (ORCPT ); Tue, 21 Dec 2021 15:10:48 -0500 Received: from mail-lj1-x233.google.com (mail-lj1-x233.google.com [IPv6:2a00:1450:4864:20::233]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2E48DC061574; Tue, 21 Dec 2021 12:10:48 -0800 (PST) Received: by mail-lj1-x233.google.com with SMTP id z8so110839ljz.9; Tue, 21 Dec 2021 12:10:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=DUTD85DTqFh8A4kGTDuc3IZA1YdriBEGBR1o80m5qXg=; b=QJbP+m5ENMCLb32+58udXRwmKFtpZR/Jn5kpWoDjgSQeJK8Ny8xiL2FLgLE1FY5xj3 rjhkeuKdGZL1w6IJkbfVjJZ4QPJowh2VhVqXDNKQhcDnUcbv9CEacUv+5tCbJ7FzfFsY lFNXwdqT3L3MNm2KSy3EwRfRqwgIsuI9uVHAvUbPhm9fhSTLci9HaOY0aecyUwW3RJFt L093Uk1e0Zrfhx3nCpMA+OLtadEnWc22K2Bt53kxBL+9JoXq/aVXXLJsOBfVIp5v8esG /hCO18IVZNB7x6RKsggRMdZB1tqzz16oYbILW996ErppsuWe5LsNTTjOYF1FhPFXTPc2 wK/g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=DUTD85DTqFh8A4kGTDuc3IZA1YdriBEGBR1o80m5qXg=; b=7/OCQ0y5UpE/m4oZj2bwk2nY+z5s+8LTw6Ht221TLpBHM+fb/rjqsS03K+Ge+ot8ZV TdPDKUHfPr7CIsXW0yOsdQzmMNirmVg4mVrDkud6LGa+E8D0gQGd5wq/mW8Hnu1V5pu/ sbY0hmDOVvnZFXeQCWThQzi0EPYMSTsZwBZHtR61OQKwOF7F/vb854WeaDER/VDmIGg+ y83rDKVMzEBEXcOvS5J25cHYj5st6w/POiDFE9PqJkeRwu3+FAHFrn4G5Z4sXTUaP0Kr m6hXBKkWJzFa308eivvk5Zv+Q3zhAzuzJVCjqUe1DYSAjLCUcc7lRr2jS2n/6qWS1owS DwaA== X-Gm-Message-State: AOAM532Nxum8glx8bQBKjgRRnyLx98rWjcf6+Xq547oTbs884SS9iqRa dbZD+Ri0n6oWvjpKPKeJIXk= X-Google-Smtp-Source: ABdhPJwSBbfWRMMbV6dSe98Hu6LuthQ0RfohJQzy6Z3HBsE+XDP3K2cL7FIK7/TsdodtGglA/WbZ5g== X-Received: by 2002:a2e:84c4:: with SMTP id q4mr9911ljh.266.1640117446444; Tue, 21 Dec 2021 12:10:46 -0800 (PST) Received: from localhost.localdomain ([94.103.235.97]) by smtp.gmail.com with ESMTPSA id m2sm1656560lfu.254.2021.12.21.12.10.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 21 Dec 2021 12:10:46 -0800 (PST) From: Pavel Skripkin To: davem@davemloft.net, kuba@kernel.org, linux@rempel-privat.de, andrew@lunn.ch, robert.foss@collabora.com, freddy@asix.com.tw Cc: linux-usb@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Pavel Skripkin Subject: [PATCH v2 2/2] asix: fix wrong return value in asix_check_host_enable() Date: Tue, 21 Dec 2021 23:10:43 +0300 Message-Id: X-Mailer: git-send-email 2.34.1 In-Reply-To: <8966e3b514edf39857dd93603fc79ec02e000a75.1640117288.git.paskripkin@gmail.com> References: <8966e3b514edf39857dd93603fc79ec02e000a75.1640117288.git.paskripkin@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org If asix_read_cmd() returns 0 on 30th interation, 0 will be returned from asix_check_host_enable(), which is logically wrong. Fix it by returning -ETIMEDOUT explicitly if we have exceeded 30 iterations Also, replaced 30 with #define as suggested by Andrew Fixes: a786e3195d6a ("net: asix: fix uninit value bugs") Reported-by: Andrew Lunn Signed-off-by: Pavel Skripkin --- Changes in v2: - Fixed coding style issues - Replaced 30 with #define --- drivers/net/usb/asix_common.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/net/usb/asix_common.c b/drivers/net/usb/asix_common.c index 06823d7141b6..71682970be58 100644 --- a/drivers/net/usb/asix_common.c +++ b/drivers/net/usb/asix_common.c @@ -9,6 +9,8 @@ #include "asix.h" +#define AX_HOST_EN_RETRIES 30 + int asix_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index, u16 size, void *data, int in_pm) { @@ -68,7 +70,7 @@ static int asix_check_host_enable(struct usbnet *dev, int in_pm) int i, ret; u8 smsr; - for (i = 0; i < 30; ++i) { + for (i = 0; i < AX_HOST_EN_RETRIES; ++i) { ret = asix_set_sw_mii(dev, in_pm); if (ret == -ENODEV || ret == -ETIMEDOUT) break; @@ -83,7 +85,7 @@ static int asix_check_host_enable(struct usbnet *dev, int in_pm) break; } - return ret; + return i >= AX_HOST_EN_RETRIES ? -ETIMEDOUT : ret; } static void reset_asix_rx_fixup_info(struct asix_rx_fixup_info *rx)