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 X-Spam-Level: X-Spam-Status: No, score=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0B15BC48BD3 for ; Thu, 27 Jun 2019 00:36:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D6603217F4 for ; Thu, 27 Jun 2019 00:36:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1561595778; bh=ax3EhtTyIa1gkxgJvuKnzayGRP+7X7kLv2hgmp5yodg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Wk/NI3qpNPK+/Bt2868kiqsgGmHkgHVxj8iTyso/TYhTjkoF4OsaaB65/UQPpepdq CUhjw/3LMAWL3tWcFPMk+u4jw+RjiiwUolgOoC5YTBaZ8G2tZJPZRp8E/1APcxsgYO ZjdVapSFL3lTvRUZZTua+ibX7O4r0UtrvnjbDH2E= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728166AbfF0AfC (ORCPT ); Wed, 26 Jun 2019 20:35:02 -0400 Received: from mail.kernel.org ([198.145.29.99]:39366 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728180AbfF0AfA (ORCPT ); Wed, 26 Jun 2019 20:35:00 -0400 Received: from sasha-vm.mshome.net (unknown [107.242.116.147]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id DE0872183F; Thu, 27 Jun 2019 00:34:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1561595700; bh=ax3EhtTyIa1gkxgJvuKnzayGRP+7X7kLv2hgmp5yodg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FULfvBmXOzdo7NXiJ7DDoseVmO6leYHdGL0aTnxFUZ3WmDtFCJm2BhBi826Sd7b77 uc42WpwnB8GB76hlsemYxyRe/0pT22OfFcZKhHsHlQbgukRJ8Qcit4fCY7mdMi4rTD GQ36Iap3B0m5omrnbHQW+7KoKMDtFh400ckj6tS8= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: "Mauro S. M. Rodrigues" , Sudarsana Reddy Kalluru , "David S . Miller" , Sasha Levin , netdev@vger.kernel.org Subject: [PATCH AUTOSEL 5.1 84/95] bnx2x: Check if transceiver implements DDM before access Date: Wed, 26 Jun 2019 20:30:09 -0400 Message-Id: <20190627003021.19867-84-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190627003021.19867-1-sashal@kernel.org> References: <20190627003021.19867-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: "Mauro S. M. Rodrigues" [ Upstream commit cf18cecca911c0db96b868072665347efe6df46f ] Some transceivers may comply with SFF-8472 even though they do not implement the Digital Diagnostic Monitoring (DDM) interface described in the spec. The existence of such area is specified by the 6th bit of byte 92, set to 1 if implemented. Currently, without checking this bit, bnx2x fails trying to read sfp module's EEPROM with the follow message: ethtool -m enP5p1s0f1 Cannot get Module EEPROM data: Input/output error Because it fails to read the additional 256 bytes in which it is assumed to exist the DDM data. This issue was noticed using a Mellanox Passive DAC PN 01FT738. The EEPROM data was confirmed by Mellanox as correct and similar to other Passive DACs from other manufacturers. Signed-off-by: Mauro S. M. Rodrigues Acked-by: Sudarsana Reddy Kalluru Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c | 3 ++- drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.h | 1 + 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c index 749d0ef44371..59f227fcc68b 100644 --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c @@ -1609,7 +1609,8 @@ static int bnx2x_get_module_info(struct net_device *dev, } if (!sff8472_comp || - (diag_type & SFP_EEPROM_DIAG_ADDR_CHANGE_REQ)) { + (diag_type & SFP_EEPROM_DIAG_ADDR_CHANGE_REQ) || + !(diag_type & SFP_EEPROM_DDM_IMPLEMENTED)) { modinfo->type = ETH_MODULE_SFF_8079; modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; } else { diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.h b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.h index b7d251108c19..7115f5025664 100644 --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.h +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.h @@ -62,6 +62,7 @@ #define SFP_EEPROM_DIAG_TYPE_ADDR 0x5c #define SFP_EEPROM_DIAG_TYPE_SIZE 1 #define SFP_EEPROM_DIAG_ADDR_CHANGE_REQ (1<<2) +#define SFP_EEPROM_DDM_IMPLEMENTED (1<<6) #define SFP_EEPROM_SFF_8472_COMP_ADDR 0x5e #define SFP_EEPROM_SFF_8472_COMP_SIZE 1 -- 2.20.1