From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753404AbbGNRPF (ORCPT ); Tue, 14 Jul 2015 13:15:05 -0400 Received: from smtp1.mail.ru ([94.100.179.111]:52598 "EHLO smtp1.mail.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753336AbbGNRPC (ORCPT ); Tue, 14 Jul 2015 13:15:02 -0400 X-Greylist: delayed 322 seconds by postgrey-1.27 at vger.kernel.org; Tue, 14 Jul 2015 13:15:01 EDT Message-ID: <55A5438F.8070903@list.ru> Date: Tue, 14 Jul 2015 20:14:55 +0300 From: Stas Sergeev User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 MIME-Version: 1.0 To: netdev CC: Linux kernel , Sebastien Rannou , Arnaud Ebalard , Stas Sergeev , Florian Fainelli , Thomas Petazzoni , stable@vger.kernel.org Subject: [PATCH 3/3] mvneta: use inband status only when explicitly enabled References: <55A5424D.4030809@list.ru> In-Reply-To: <55A5424D.4030809@list.ru> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-Spam: Not detected X-Mras: Ok Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The commit 898b2970e2c9 ("mvneta: implement SGMII-based in-band link state signaling") implemented the link parameters auto-negotiation unconditionally. Unfortunately it appears that some HW that implements SGMII protocol, doesn't generate the inband status, so it is not possible to auto-negotiate anything with such HW. This patch enables the auto-negotiation only if explicitly requested with the 'managed' DT property. This patch fixes the following regression: https://lkml.org/lkml/2015/7/8/865 and is therefore CCed to stable. Signed-off-by: Stas Sergeev CC: Thomas Petazzoni CC: netdev@vger.kernel.org CC: linux-kernel@vger.kernel.org CC: stable@vger.kernel.org --- drivers/net/ethernet/marvell/mvneta.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c index 74176ec..7a1deee 100644 --- a/drivers/net/ethernet/marvell/mvneta.c +++ b/drivers/net/ethernet/marvell/mvneta.c @@ -3008,8 +3008,8 @@ static int mvneta_probe(struct platform_device *pdev) const char *dt_mac_addr; char hw_mac_addr[ETH_ALEN]; const char *mac_from; + const char *managed; int phy_mode; - int fixed_phy = 0; int err; /* Our multiqueue support is not complete, so for now, only @@ -3043,7 +3043,6 @@ static int mvneta_probe(struct platform_device *pdev) dev_err(&pdev->dev, "cannot register fixed PHY\n"); goto err_free_irq; } - fixed_phy = 1; /* In the case of a fixed PHY, the DT node associated * to the PHY is the Ethernet MAC DT node. @@ -3067,8 +3066,10 @@ static int mvneta_probe(struct platform_device *pdev) pp = netdev_priv(dev); pp->phy_node = phy_node; pp->phy_interface = phy_mode; - pp->use_inband_status = (phy_mode == PHY_INTERFACE_MODE_SGMII) && - fixed_phy; + + err = of_property_read_string(dn, "managed", &managed); + pp->use_inband_status = (err == 0 && + strcmp(managed, "in-band-status") == 0); pp->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(pp->clk)) { -- 1.9.1