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=-20.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 A0A40C11F6A for ; Tue, 6 Jul 2021 11:24:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 86D9B61E47 for ; Tue, 6 Jul 2021 11:24:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234083AbhGFL0x (ORCPT ); Tue, 6 Jul 2021 07:26:53 -0400 Received: from mail.kernel.org ([198.145.29.99]:55764 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233139AbhGFLUH (ORCPT ); Tue, 6 Jul 2021 07:20:07 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id A8FAF61C81; Tue, 6 Jul 2021 11:17:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1625570236; bh=HGekkCC/ze57AUR8GofCif+vLEiHASe+rnbp3h+2LsA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RbXfn7lPCh+FDXe/0S1uYCgLl4BEFFdroMjabZMnbOwkjgvFarRvlU30CuANQLmj6 a8is1ZZ74PDo0JCqbB29/7skOVR2cxFLCIlqqGUB/V9TD6U9q//QoG7gPRVySB2Ls7 GPUEYQ+nrA3nKrLKXlr2+UIw1ByYr9GCp0Sl1w+Jo+RCCEHf3neOb5XZkptGctbrpQ pWbbNCh/pFjr0Pd9vugQwgsyIM4uE0NEDcXeXSf9dg2A+/HJzwzp10kSwDURemu7Ee 6DEzJjqdY5dblfHy10b0tIZPHl/gDcaFm2r+cA/0xx6lbTrsusEO/NJSKM1AaJDlKO bV+O+vABQ6sMA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Pascal Terjan , Kalle Valo , Sasha Levin , linux-wireless@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 5.13 138/189] rtl8xxxu: Fix device info for RTL8192EU devices Date: Tue, 6 Jul 2021 07:13:18 -0400 Message-Id: <20210706111409.2058071-138-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210706111409.2058071-1-sashal@kernel.org> References: <20210706111409.2058071-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Pascal Terjan [ Upstream commit c240b044edefa3c3af4014a4030e017dd95b59a1 ] Based on 2001:3319 and 2357:0109 which I used to test the fix and 0bda:818b and 2357:0108 for which I found efuse dumps online. == 2357:0109 == === Before === Vendor: Realtek Product: \x03802.11n NI Serial: === After === Vendor: Realtek Product: 802.11n NIC Serial not available. == 2001:3319 == === Before === Vendor: Realtek Product: Wireless N Serial: no USB Adap === After === Vendor: Realtek Product: Wireless N Nano USB Adapter Serial not available. Signed-off-by: Pascal Terjan Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20210424172959.1559890-1-pterjan@google.com Signed-off-by: Sasha Levin --- .../net/wireless/realtek/rtl8xxxu/rtl8xxxu.h | 11 +--- .../realtek/rtl8xxxu/rtl8xxxu_8192e.c | 59 +++++++++++++++++-- 2 files changed, 56 insertions(+), 14 deletions(-) diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h index d1a566cc0c9e..01735776345a 100644 --- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h @@ -853,15 +853,10 @@ struct rtl8192eu_efuse { u8 usb_optional_function; u8 res9[2]; u8 mac_addr[ETH_ALEN]; /* 0xd7 */ - u8 res10[2]; - u8 vendor_name[7]; - u8 res11[2]; - u8 device_name[0x0b]; /* 0xe8 */ - u8 res12[2]; - u8 serial[0x0b]; /* 0xf5 */ - u8 res13[0x30]; + u8 device_info[80]; + u8 res11[3]; u8 unknown[0x0d]; /* 0x130 */ - u8 res14[0xc3]; + u8 res12[0xc3]; }; struct rtl8xxxu_reg8val { diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_8192e.c b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_8192e.c index cfe2dfdae928..b06508d0cdf8 100644 --- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_8192e.c +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_8192e.c @@ -554,9 +554,43 @@ rtl8192e_set_tx_power(struct rtl8xxxu_priv *priv, int channel, bool ht40) } } +static void rtl8192eu_log_next_device_info(struct rtl8xxxu_priv *priv, + char *record_name, + char *device_info, + unsigned int *record_offset) +{ + char *record = device_info + *record_offset; + + /* A record is [ total length | 0x03 | value ] */ + unsigned char l = record[0]; + + /* + * The whole device info section seems to be 80 characters, make sure + * we don't read further. + */ + if (*record_offset + l > 80) { + dev_warn(&priv->udev->dev, + "invalid record length %d while parsing \"%s\" at offset %u.\n", + l, record_name, *record_offset); + return; + } + + if (l >= 2) { + char value[80]; + + memcpy(value, &record[2], l - 2); + value[l - 2] = '\0'; + dev_info(&priv->udev->dev, "%s: %s\n", record_name, value); + *record_offset = *record_offset + l; + } else { + dev_info(&priv->udev->dev, "%s not available.\n", record_name); + } +} + static int rtl8192eu_parse_efuse(struct rtl8xxxu_priv *priv) { struct rtl8192eu_efuse *efuse = &priv->efuse_wifi.efuse8192eu; + unsigned int record_offset; int i; if (efuse->rtl_id != cpu_to_le16(0x8129)) @@ -604,12 +638,25 @@ static int rtl8192eu_parse_efuse(struct rtl8xxxu_priv *priv) priv->has_xtalk = 1; priv->xtalk = priv->efuse_wifi.efuse8192eu.xtal_k & 0x3f; - dev_info(&priv->udev->dev, "Vendor: %.7s\n", efuse->vendor_name); - dev_info(&priv->udev->dev, "Product: %.11s\n", efuse->device_name); - if (memchr_inv(efuse->serial, 0xff, 11)) - dev_info(&priv->udev->dev, "Serial: %.11s\n", efuse->serial); - else - dev_info(&priv->udev->dev, "Serial not available.\n"); + /* + * device_info section seems to be laid out as records + * [ total length | 0x03 | value ] so: + * - vendor length + 2 + * - 0x03 + * - vendor string (not null terminated) + * - product length + 2 + * - 0x03 + * - product string (not null terminated) + * Then there is one or 2 0x00 on all the 4 devices I own or found + * dumped online. + * As previous version of the code handled an optional serial + * string, I now assume there may be a third record if the + * length is not 0. + */ + record_offset = 0; + rtl8192eu_log_next_device_info(priv, "Vendor", efuse->device_info, &record_offset); + rtl8192eu_log_next_device_info(priv, "Product", efuse->device_info, &record_offset); + rtl8192eu_log_next_device_info(priv, "Serial", efuse->device_info, &record_offset); if (rtl8xxxu_debug & RTL8XXXU_DEBUG_EFUSE) { unsigned char *raw = priv->efuse_wifi.raw; -- 2.30.2