From patchwork Wed Apr 20 15:23:45 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dinh Nguyen X-Patchwork-Id: 564306 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 E2E5DC433F5 for ; Wed, 20 Apr 2022 15:23:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1354695AbiDTP0k (ORCPT ); Wed, 20 Apr 2022 11:26:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56586 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1351566AbiDTP0i (ORCPT ); Wed, 20 Apr 2022 11:26:38 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8411545784; Wed, 20 Apr 2022 08:23:52 -0700 (PDT) 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 dfw.source.kernel.org (Postfix) with ESMTPS id 0221A618EF; Wed, 20 Apr 2022 15:23:52 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 95CDAC385A1; Wed, 20 Apr 2022 15:23:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1650468231; bh=fGoYvTCERq6W+4c1n/bIy8S4IsI8Y/53T0F5nkCUz/0=; h=From:To:Cc:Subject:Date:From; b=d02SIrWFUjLs3gpjnr72vQQbxEbBHNSx47OM8gzk3Lxb7GxwD6I74Lp8hIZTrTurf AMFRqY2MoGSlpV2SjW6kvPhCVBjdNHBU93OS5t4/Kv+XPEUmqMsO5n1uCUb+dxs2JU dZnLSny1UXKCC9VGiBTxEcHnKX+rpq7vnhZqClheAFR/MKpeN9+5zCv1EhtxWUm/1w +65vfutAqtgOvnDQ2USvBliFIQXRrJeA0sNcCgV9reOAj0aDjcOvQa9YHn4t06OT58 kNZEdjQeUastUozhr3jmHJOyNQf2z8YjKRZ/YUXhlHDDCeabCXOwJaolHM/8hWrNij jdKp23lyik0ew== From: Dinh Nguyen To: davem@davemloft.net Cc: dinguyen@kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-stable Subject: [PATCH] net: ethernet: stmmac: fix write to sgmii_adapter_base Date: Wed, 20 Apr 2022 10:23:45 -0500 Message-Id: <20220420152345.27415-1-dinguyen@kernel.org> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org I made a mistake with the commit a6aaa0032424 ("net: ethernet: stmmac: fix altr_tse_pcs function when using a fixed-link"). I should have tested against both scenario of having a SGMII interface and one without. Without the SGMII PCS TSE adpater, the sgmii_adapter_base address is NULL, thus a write to this address will fail. Fixes: a6aaa0032424 ("net: ethernet: stmmac: fix altr_tse_pcs function when using a fixed-link") Cc: linux-stable Signed-off-by: Dinh Nguyen --- drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c index ac9e6c7a33b5..6b447d8f0bd8 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c @@ -65,8 +65,9 @@ static void socfpga_dwmac_fix_mac_speed(void *priv, unsigned int speed) struct phy_device *phy_dev = ndev->phydev; u32 val; - writew(SGMII_ADAPTER_DISABLE, - sgmii_adapter_base + SGMII_ADAPTER_CTRL_REG); + if (sgmii_adapter_base) + writew(SGMII_ADAPTER_DISABLE, + sgmii_adapter_base + SGMII_ADAPTER_CTRL_REG); if (splitter_base) { val = readl(splitter_base + EMAC_SPLITTER_CTRL_REG); @@ -88,10 +89,11 @@ static void socfpga_dwmac_fix_mac_speed(void *priv, unsigned int speed) writel(val, splitter_base + EMAC_SPLITTER_CTRL_REG); } - writew(SGMII_ADAPTER_ENABLE, - sgmii_adapter_base + SGMII_ADAPTER_CTRL_REG); - if (phy_dev) + if (phy_dev && sgmii_adapter_base) { + writew(SGMII_ADAPTER_ENABLE, + sgmii_adapter_base + SGMII_ADAPTER_CTRL_REG); tse_pcs_fix_mac_speed(&dwmac->pcs, phy_dev, speed); + } } static int socfpga_dwmac_parse_data(struct socfpga_dwmac *dwmac, struct device *dev)