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,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=ham 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 E9898C43219 for ; Mon, 29 Apr 2019 06:38:56 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B6F1E2075E for ; Mon, 29 Apr 2019 06:38:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="JdB2ZPWN" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B6F1E2075E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=7rEt43VVkDohRl9O54oPZZVPvG7iSfDKgQ95y4wift4=; b=JdB2ZPWNMaUhcg X0cq0cUhlj16mtlizRhXuKZfrwbg+7jZa3EARcu8vQIeARFMRvFEzSGRyvWOJNY1VwYpN92PI01Qw Kk5F07cmxXIAdCTbKgy56lqwD39xEsZFGctDngqfqtHTaDWPo/ZQIN9dI/GDkbfodchu2KfpiCsGN SNBfeRXDcli87pDIy5RjObpz4cXX4QCRUEuuz53YmAoJZ8KM/+ZCPua9wpOGUFJwRw8gKZiv1H1ss DENXbUPYGWYoBYk6Qh++LBM5qp6gjHYCfHXgW+RwK8ljHihHb3lUuFSrt3JzkHTu8IFjV8i2TCwWT ksCsBrPTWkFp/zv1j+Zw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hKzwD-0005fT-TM; Mon, 29 Apr 2019 06:38:53 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hKzw5-0005TE-4b; Mon, 29 Apr 2019 06:38:46 +0000 X-UUID: 9b29542057d6440ba9991c2784e2aa8c-20190428 X-UUID: 9b29542057d6440ba9991c2784e2aa8c-20190428 Received: from mtkcas68.mediatek.inc [(172.29.94.19)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 1765915400; Sun, 28 Apr 2019 22:38:44 -0800 Received: from mtkmbs03n1.mediatek.inc (172.21.101.181) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Sun, 28 Apr 2019 23:38:42 -0700 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs03n1.mediatek.inc (172.21.101.181) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 29 Apr 2019 14:38:41 +0800 Received: from mtkslt306.mediatek.inc (10.21.14.136) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Mon, 29 Apr 2019 14:38:41 +0800 From: Xiaolei Li To: , Subject: [PATCH 3/5] mtd: rawnand: mtk: Add validity check for CE# pin setting Date: Mon, 29 Apr 2019 14:38:32 +0800 Message-ID: <20190429063834.45967-4-xiaolei.li@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20190429063834.45967-1-xiaolei.li@mediatek.com> References: <20190429063834.45967-1-xiaolei.li@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190428_233845_178024_BA8981C0 X-CRM114-Status: UNSURE ( 9.75 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-mediatek@lists.infradead.org, xiaolei.li@mediatek.com, linux-mtd@lists.infradead.org, srv_heupstream@mediatek.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org Currently, we only check how many CE# pins are set in device tree. But it should be necessary to check whether CE# pin setting is duplicated or if CE# pin index exceeds the maximum CE# number that controller supports. So, add validity check to avoid these invalid settings. Signed-off-by: Xiaolei Li --- drivers/mtd/nand/raw/mtk_nand.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/mtd/nand/raw/mtk_nand.c b/drivers/mtd/nand/raw/mtk_nand.c index a2f7af536380..7a5e8c9cf61b 100644 --- a/drivers/mtd/nand/raw/mtk_nand.c +++ b/drivers/mtd/nand/raw/mtk_nand.c @@ -162,6 +162,8 @@ struct mtk_nfc { struct list_head chips; u8 *buffer; + + unsigned long assigned_cs; }; /* @@ -1351,6 +1353,17 @@ static int mtk_nfc_nand_chip_init(struct device *dev, struct mtk_nfc *nfc, dev_err(dev, "reg property failure : %d\n", ret); return ret; } + + if (tmp >= MTK_NAND_MAX_NSELS) { + dev_err(dev, "invalid CS: %u\n", tmp); + return -EINVAL; + } + + if (test_and_set_bit(tmp, &nfc->assigned_cs)) { + dev_err(dev, "CS %u already assigned\n", tmp); + return -EINVAL; + } + chip->sels[i] = tmp; } -- 2.18.0 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/