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 E62A6C433F5 for ; Tue, 28 Dec 2021 00:09:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234107AbhL1AJL (ORCPT ); Mon, 27 Dec 2021 19:09:11 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38232 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230112AbhL1AJJ (ORCPT ); Mon, 27 Dec 2021 19:09:09 -0500 Received: from fudo.makrotopia.org (fudo.makrotopia.org [IPv6:2a07:2ec0:3002::71]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 04893C06173E; Mon, 27 Dec 2021 16:09:08 -0800 (PST) Received: from local by fudo.makrotopia.org with esmtpsa (TLS1.3:TLS_AES_256_GCM_SHA384:256) (Exim 4.94.2) (envelope-from ) id 1n2038-0001LL-Eu; Tue, 28 Dec 2021 01:09:06 +0100 Date: Tue, 28 Dec 2021 00:08:58 +0000 From: Daniel Golle To: linux-mediatek@lists.infradead.org, netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Felix Fietkau , John Crispin , Sean Wang , Mark Lee , "David S. Miller" , Jakub Kicinski , Matthias Brugger , Russell King , Andrew Lunn Subject: [PATCH v6 1/2] net: ethernet: mtk_eth_soc: fix return value of MDIO ops Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Instead of returning -1 (-EPERM) when MDIO bus is stuck busy while writing or 0xffff if it happens while reading, return the appropriate -EBUSY. Also fix return type to int instead of u32. Fixes: 656e705243fd0 ("net-next: mediatek: add support for MT7623 ethernet") Signed-off-by: Daniel Golle --- drivers/net/ethernet/mediatek/mtk_eth_soc.c | 22 +++++++++------------ 1 file changed, 9 insertions(+), 13 deletions(-) diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c index bcb91b01e69f5..72b3ae7b5ff8d 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c @@ -94,31 +94,29 @@ static int mtk_mdio_busy_wait(struct mtk_eth *eth) return -1; } -static u32 _mtk_mdio_write(struct mtk_eth *eth, u32 phy_addr, - u32 phy_register, u32 write_data) +static int _mtk_mdio_write(struct mtk_eth *eth, u32 phy_addr, u32 phy_reg, + u32 write_data) { if (mtk_mdio_busy_wait(eth)) - return -1; + return -EBUSY; write_data &= 0xffff; mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START | PHY_IAC_WRITE | - (phy_register << PHY_IAC_REG_SHIFT) | + (phy_reg << PHY_IAC_REG_SHIFT) | (phy_addr << PHY_IAC_ADDR_SHIFT) | write_data, MTK_PHY_IAC); if (mtk_mdio_busy_wait(eth)) - return -1; + return -EBUSY; return 0; } -static u32 _mtk_mdio_read(struct mtk_eth *eth, int phy_addr, int phy_reg) +static int _mtk_mdio_read(struct mtk_eth *eth, u32 phy_addr, u32 phy_reg) { - u32 d; - if (mtk_mdio_busy_wait(eth)) - return 0xffff; + return -EBUSY; mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START | PHY_IAC_READ | (phy_reg << PHY_IAC_REG_SHIFT) | @@ -126,11 +124,9 @@ static u32 _mtk_mdio_read(struct mtk_eth *eth, int phy_addr, int phy_reg) MTK_PHY_IAC); if (mtk_mdio_busy_wait(eth)) - return 0xffff; - - d = mtk_r32(eth, MTK_PHY_IAC) & 0xffff; + return -EBUSY; - return d; + return mtk_r32(eth, MTK_PHY_IAC) & 0xffff; } static int mtk_mdio_write(struct mii_bus *bus, int phy_addr, -- 2.34.1