From patchwork Sat Dec 3 21:33:18 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ryder Lee X-Patchwork-Id: 631546 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 84C97C4332F for ; Sat, 3 Dec 2022 21:33:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229723AbiLCVdi (ORCPT ); Sat, 3 Dec 2022 16:33:38 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38670 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229680AbiLCVde (ORCPT ); Sat, 3 Dec 2022 16:33:34 -0500 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2DFDA101F0 for ; Sat, 3 Dec 2022 13:33:28 -0800 (PST) X-UUID: edc82c4bd36c4a30a07803db4a4aeb5b-20221204 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=pUsLt8JG8kdXNrYQeg2np4Pi1+grwPio4guJ7dit6UU=; b=PBe7Vjf1p/XVArlv3B52Kgmo+w01yvAe6q12s09KNuHUpljlPNmE52rTvANtMy/l2IvQWOx0dE1tuXensbPgjjTwugLPFxVbLY3LdSfcS/jQchu4zN5RrqmKHKoa1y5b4x/dJqCwuUojf0HFrLK/ycpkG31nBTC/NVOJAlQNJkQ=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.14, REQID:d1200531-1968-41a7-b741-77d56ea21585, IP:0, U RL:0,TC:0,Content:-5,EDM:0,RT:0,SF:95,FILE:0,BULK:0,RULE:Release_Ham,ACTIO N:release,TS:90 X-CID-INFO: VERSION:1.1.14, REQID:d1200531-1968-41a7-b741-77d56ea21585, IP:0, URL :0,TC:0,Content:-5,EDM:0,RT:0,SF:95,FILE:0,BULK:0,RULE:Spam_GS981B3D,ACTIO N:quarantine,TS:90 X-CID-META: VersionHash:dcaaed0, CLOUDID:bef59330-2938-482e-aafd-98d66723b8a9, B ulkID:221204053324YYIDDYKS,BulkQuantity:0,Recheck:0,SF:38|28|17|19|48,TC:n il,Content:0,EDM:-3,IP:nil,URL:0,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0 X-UUID: edc82c4bd36c4a30a07803db4a4aeb5b-20221204 Received: from mtkcas10.mediatek.inc [(172.21.101.39)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1958523961; Sun, 04 Dec 2022 05:33:21 +0800 Received: from mtkmbs11n1.mediatek.inc (172.21.101.185) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.15; Sun, 4 Dec 2022 05:33:21 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.15 via Frontend Transport; Sun, 4 Dec 2022 05:33:21 +0800 From: Ryder Lee To: Felix Fietkau , CC: Lorenzo Bianconi , Shayne Chen , Evelyn Tsai , , Ryder Lee Subject: [PATCH v2 2/3] wifi: mt76: mt7996: check return value before accessing free_block_num Date: Sun, 4 Dec 2022 05:33:18 +0800 Message-ID: <9ccf148192bb47462468ec286c8b3657051ddb02.1670102099.git.ryder.lee@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <3fec8b8c618a78d1197f4060f89fa8bdd836b425.1670102099.git.ryder.lee@mediatek.com> References: <3fec8b8c618a78d1197f4060f89fa8bdd836b425.1670102099.git.ryder.lee@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Check return value of mt7996_mcu_get_eeprom_free_block() first before accessing free_block_num. Fixes: 98686cd21624 ("wifi: mt76: mt7996: add driver for MediaTek Wi-Fi 7 (802.11be) devices") Signed-off-by: Ryder Lee --- change since v2 - check return value of mt7996_mcu_get_eeprom as well. --- .../net/wireless/mediatek/mt76/mt7996/eeprom.c | 18 ++++++++++++------ .../net/wireless/mediatek/mt76/mt7996/mcu.c | 5 +++-- 2 files changed, 15 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/eeprom.c b/drivers/net/wireless/mediatek/mt76/mt7996/eeprom.c index b9f62bedbc48..5d8e0353627e 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7996/eeprom.c +++ b/drivers/net/wireless/mediatek/mt76/mt7996/eeprom.c @@ -65,17 +65,23 @@ static int mt7996_eeprom_load(struct mt7996_dev *dev) } else { u8 free_block_num; u32 block_num, i; + u32 eeprom_blk_size = MT7996_EEPROM_BLOCK_SIZE; - /* TODO: check free block event */ - mt7996_mcu_get_eeprom_free_block(dev, &free_block_num); - /* efuse info not enough */ + ret = mt7996_mcu_get_eeprom_free_block(dev, &free_block_num); + if (ret < 0) + return ret; + + /* efuse info isn't enough */ if (free_block_num >= 59) return -EINVAL; /* read eeprom data from efuse */ - block_num = DIV_ROUND_UP(MT7996_EEPROM_SIZE, MT7996_EEPROM_BLOCK_SIZE); - for (i = 0; i < block_num; i++) - mt7996_mcu_get_eeprom(dev, i * MT7996_EEPROM_BLOCK_SIZE); + block_num = DIV_ROUND_UP(MT7996_EEPROM_SIZE, eeprom_blk_size); + for (i = 0; i < block_num; i++) { + ret = mt7996_mcu_get_eeprom(dev, i * eeprom_blk_size); + if (ret < 0) + return ret; + } } return mt7996_check_eeprom(dev); diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c index efb245c8ac84..da72684e4308 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c +++ b/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c @@ -2927,8 +2927,9 @@ int mt7996_mcu_get_eeprom(struct mt7996_dev *dev, u32 offset) bool valid; int ret; - ret = mt76_mcu_send_and_get_msg(&dev->mt76, MCU_WM_UNI_CMD_QUERY(EFUSE_CTRL), &req, - sizeof(req), true, &skb); + ret = mt76_mcu_send_and_get_msg(&dev->mt76, + MCU_WM_UNI_CMD_QUERY(EFUSE_CTRL), + &req, sizeof(req), true, &skb); if (ret) return ret;