From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,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 72688C4742C for ; Sat, 31 Oct 2020 11:41:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2BA3620731 for ; Sat, 31 Oct 2020 11:41:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604144517; bh=WeHnhktlaLP40UbvEfH3d86BOIfU0gD+BrC+KSdjyrY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=TgD3nEau4/lpehhDaXLXpQwSKqdjCQhMjbIG3IVccOg7NcbedYdhh+ve5KgOD4c1l kirlapVR1v+oygKRqHoZL8U5B8LdPVceX7TjIUesNWCGfi4AkvMCyBX63ZTm35dpPU mbU/vnnZgE1gtD1eg0R+/SJOG99xK7lI3Kucel8g= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727774AbgJaLl4 (ORCPT ); Sat, 31 Oct 2020 07:41:56 -0400 Received: from mail.kernel.org ([198.145.29.99]:41086 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727318AbgJaLlu (ORCPT ); Sat, 31 Oct 2020 07:41:50 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 9E0E020719; Sat, 31 Oct 2020 11:41:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604144510; bh=WeHnhktlaLP40UbvEfH3d86BOIfU0gD+BrC+KSdjyrY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KJlxi0DwDXv2MKrZGcrGejrpa8pJSsOC5fh7WX0WtSDg+A+j6obSb7OeTA9tWkAIC XWYVMNzNiyOLFmNrir3RpO6q5AGzHwevOUkTtT/LAYKqao5p2DlR2/UjngygFJ+72/ PnjD8MU/N3QDCeWrj7EJdd9q7i+v9wumMWGQzXnc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Julia Lawall , Andrew Gabbasov , Sergei Shtylyov , Jakub Kicinski Subject: [PATCH 5.8 45/70] ravb: Fix bit fields checking in ravb_hwtstamp_get() Date: Sat, 31 Oct 2020 12:36:17 +0100 Message-Id: <20201031113501.656565409@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201031113459.481803250@linuxfoundation.org> References: <20201031113459.481803250@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Andrew Gabbasov [ Upstream commit 68b9f0865b1ef545da180c57d54b82c94cb464a4 ] In the function ravb_hwtstamp_get() in ravb_main.c with the existing values for RAVB_RXTSTAMP_TYPE_V2_L2_EVENT (0x2) and RAVB_RXTSTAMP_TYPE_ALL (0x6) if (priv->tstamp_rx_ctrl & RAVB_RXTSTAMP_TYPE_V2_L2_EVENT) config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT; else if (priv->tstamp_rx_ctrl & RAVB_RXTSTAMP_TYPE_ALL) config.rx_filter = HWTSTAMP_FILTER_ALL; if the test on RAVB_RXTSTAMP_TYPE_ALL should be true, it will never be reached. This issue can be verified with 'hwtstamp_config' testing program (tools/testing/selftests/net/hwtstamp_config.c). Setting filter type to ALL and subsequent retrieving it gives incorrect value: $ hwtstamp_config eth0 OFF ALL flags = 0 tx_type = OFF rx_filter = ALL $ hwtstamp_config eth0 flags = 0 tx_type = OFF rx_filter = PTP_V2_L2_EVENT Correct this by converting if-else's to switch. Fixes: c156633f1353 ("Renesas Ethernet AVB driver proper") Reported-by: Julia Lawall Signed-off-by: Andrew Gabbasov Reviewed-by: Sergei Shtylyov Link: https://lore.kernel.org/r/20201026102130.29368-1-andrew_gabbasov@mentor.com Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/renesas/ravb_main.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -1747,12 +1747,16 @@ static int ravb_hwtstamp_get(struct net_ config.flags = 0; config.tx_type = priv->tstamp_tx_ctrl ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF; - if (priv->tstamp_rx_ctrl & RAVB_RXTSTAMP_TYPE_V2_L2_EVENT) + switch (priv->tstamp_rx_ctrl & RAVB_RXTSTAMP_TYPE) { + case RAVB_RXTSTAMP_TYPE_V2_L2_EVENT: config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT; - else if (priv->tstamp_rx_ctrl & RAVB_RXTSTAMP_TYPE_ALL) + break; + case RAVB_RXTSTAMP_TYPE_ALL: config.rx_filter = HWTSTAMP_FILTER_ALL; - else + break; + default: config.rx_filter = HWTSTAMP_FILTER_NONE; + } return copy_to_user(req->ifr_data, &config, sizeof(config)) ? -EFAULT : 0;