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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 08ED5C433FE for ; Tue, 25 Jan 2022 22:23:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233755AbiAYWX2 (ORCPT ); Tue, 25 Jan 2022 17:23:28 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34228 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233749AbiAYWX1 (ORCPT ); Tue, 25 Jan 2022 17:23:27 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7C114C06173B for ; Tue, 25 Jan 2022 14:23:27 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 3645FB81979 for ; Tue, 25 Jan 2022 22:23:26 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B89E0C340E8; Tue, 25 Jan 2022 22:23:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1643149404; bh=X4yd7Dxmu5PFhFcieA8ox30wK4paNfYa0lKukRAMuz8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pCdys/vlY2Qp4/gtHtvlGXk6GjSGjb3QJiRTkEJVq4JWB7WZCyhN+BA8+Zu3O8tNd IBMMPukejSBCpT5gFfxkllHFL0p/PuFCKG4Hf8lb4W1hNU4miigEtdynVrc35KKnu1 72rfGUawKfgzql4rC0zomFxFsXl9p12C7DOX4O14BTRivYpaK/5KiXT/LuYTUcOzJd Na99zLBfqFDQuETUvxjtAR22cMZBgP5q26iVlI1733M8VzqvGJQkUqDGktLxPww50Q HGqbHDd6Us27SZl3lYp5HunXQeOFHDtV+75t+BUiRLAduSL4djOfg8pdEXcmA40gA1 Vdk6eMcWGpPSA== From: Jakub Kicinski To: davem@davemloft.net Cc: netdev@vger.kernel.org, dave@thedillows.org, Jakub Kicinski Subject: [PATCH net 1/3] ethernet: 3com/typhoon: don't write directly to netdev->dev_addr Date: Tue, 25 Jan 2022 14:23:15 -0800 Message-Id: <20220125222317.1307561-2-kuba@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220125222317.1307561-1-kuba@kernel.org> References: <20220125222317.1307561-1-kuba@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This driver casts off the const and writes directly to netdev->dev_addr. This will result in a MAC address tree corruption and a warning. Compile tested ppc6xx_defconfig. Fixes: adeef3e32146 ("net: constify netdev->dev_addr") Signed-off-by: Jakub Kicinski --- drivers/net/ethernet/3com/typhoon.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/3com/typhoon.c b/drivers/net/ethernet/3com/typhoon.c index 481f1df3106c..8aec5d9fbfef 100644 --- a/drivers/net/ethernet/3com/typhoon.c +++ b/drivers/net/ethernet/3com/typhoon.c @@ -2278,6 +2278,7 @@ typhoon_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) struct net_device *dev; struct typhoon *tp; int card_id = (int) ent->driver_data; + u8 addr[ETH_ALEN] __aligned(4); void __iomem *ioaddr; void *shared; dma_addr_t shared_dma; @@ -2409,8 +2410,9 @@ typhoon_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) goto error_out_reset; } - *(__be16 *)&dev->dev_addr[0] = htons(le16_to_cpu(xp_resp[0].parm1)); - *(__be32 *)&dev->dev_addr[2] = htonl(le32_to_cpu(xp_resp[0].parm2)); + *(__be16 *)&addr[0] = htons(le16_to_cpu(xp_resp[0].parm1)); + *(__be32 *)&addr[2] = htonl(le32_to_cpu(xp_resp[0].parm2)); + eth_hw_addr_set(dev, addr); if (!is_valid_ether_addr(dev->dev_addr)) { err_msg = "Could not obtain valid ethernet address, aborting"; -- 2.34.1