From patchwork Mon Dec 27 18:31:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Golle X-Patchwork-Id: 12699993 X-Patchwork-Delegate: kuba@kernel.org 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 B6985C433F5 for ; Mon, 27 Dec 2021 18:31:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231652AbhL0SbT (ORCPT ); Mon, 27 Dec 2021 13:31:19 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49156 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229643AbhL0SbT (ORCPT ); Mon, 27 Dec 2021 13:31:19 -0500 Received: from fudo.makrotopia.org (fudo.makrotopia.org [IPv6:2a07:2ec0:3002::71]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3AC8AC06173E; Mon, 27 Dec 2021 10:31:19 -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 1n1umC-0000FD-RG; Mon, 27 Dec 2021 19:31:17 +0100 Date: Mon, 27 Dec 2021 18:31:09 +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 v5 1/2] net: ethernet: mtk_eth_soc: fix return value of MDIO ops Message-ID: References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@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 --- v5: fix incomplete unification of variable names phy_reg vs. phy_register v4: clean-up return values and types, split into two commits drivers/net/ethernet/mediatek/mtk_eth_soc.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c index bcb91b01e69f5..d42ce636af3fb 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c @@ -94,31 +94,31 @@ 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, int phy_addr, int 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) | @@ -126,7 +126,7 @@ 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; + return -EBUSY; d = mtk_r32(eth, MTK_PHY_IAC) & 0xffff;