From patchwork Mon May 16 19:36:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 573717 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 23399C433F5 for ; Mon, 16 May 2022 20:09:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233252AbiEPUJo (ORCPT ); Mon, 16 May 2022 16:09:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55868 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350866AbiEPUBo (ORCPT ); Mon, 16 May 2022 16:01:44 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5590E44753; Mon, 16 May 2022 12:55:59 -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 BA36F60FD4; Mon, 16 May 2022 19:55:59 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 55FE6C385AA; Mon, 16 May 2022 19:55:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1652730959; bh=zAIK8Scdfpm+47u/CP5vmP3dy1T/MXT6kt+ys0EhElw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pjaE8dFzGSUETlCgms0hoooQ5qNulQ7vvqn46zghIICLrfDm26z9wCWUG+9v3a+A2 Mm6liXQviq0OYbQyX7KNPic0emOFbZpPBFSxxwbltt75oYLBn9WaAZAvVM07sYeiJf QCG2474KdrLnEald5mtHbHUX5hIdyaFN1KbCb5ms= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Matthew Hagan , Andrew Lunn , Jakub Kicinski , Sasha Levin Subject: [PATCH 5.17 060/114] net: sfp: Add tx-fault workaround for Huawei MA5671A SFP ONT Date: Mon, 16 May 2022 21:36:34 +0200 Message-Id: <20220516193627.217051769@linuxfoundation.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220516193625.489108457@linuxfoundation.org> References: <20220516193625.489108457@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Matthew Hagan [ Upstream commit 2069624dac19d62c558bb6468fe03678553ab01d ] As noted elsewhere, various GPON SFP modules exhibit non-standard TX-fault behaviour. In the tested case, the Huawei MA5671A, when used in combination with a Marvell mv88e6085 switch, was found to persistently assert TX-fault, resulting in the module being disabled. This patch adds a quirk to ignore the SFP_F_TX_FAULT state, allowing the module to function. Change from v1: removal of erroneous return statment (Andrew Lunn) Signed-off-by: Matthew Hagan Reviewed-by: Andrew Lunn Link: https://lore.kernel.org/r/20220502223315.1973376-1-mnhagan88@gmail.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/phy/sfp.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c index 4720b24ca51b..90dfefc1f5f8 100644 --- a/drivers/net/phy/sfp.c +++ b/drivers/net/phy/sfp.c @@ -250,6 +250,7 @@ struct sfp { struct sfp_eeprom_id id; unsigned int module_power_mW; unsigned int module_t_start_up; + bool tx_fault_ignore; #if IS_ENABLED(CONFIG_HWMON) struct sfp_diag diag; @@ -1945,6 +1946,12 @@ static int sfp_sm_mod_probe(struct sfp *sfp, bool report) else sfp->module_t_start_up = T_START_UP; + if (!memcmp(id.base.vendor_name, "HUAWEI ", 16) && + !memcmp(id.base.vendor_pn, "MA5671A ", 16)) + sfp->tx_fault_ignore = true; + else + sfp->tx_fault_ignore = false; + return 0; } @@ -2397,7 +2404,10 @@ static void sfp_check_state(struct sfp *sfp) mutex_lock(&sfp->st_mutex); state = sfp_get_state(sfp); changed = state ^ sfp->state; - changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; + if (sfp->tx_fault_ignore) + changed &= SFP_F_PRESENT | SFP_F_LOS; + else + changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; for (i = 0; i < GPIO_MAX; i++) if (changed & BIT(i))