From patchwork Thu Feb 4 15:00:01 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Colin King X-Patchwork-Id: 12067507 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=-17.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 D83CBC433DB for ; Thu, 4 Feb 2021 15:00:23 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 7812D64DBA for ; Thu, 4 Feb 2021 15:00:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7812D64DBA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=canonical.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version: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:In-Reply-To:References:List-Owner; bh=UY1Jmy+mZ25+ICa8LRlQ1+zvF/5zMjnF+mfC00/yQrM=; b=0cHlPkeWeTiAa2IE69h4GaMKfx spVpveZKCmNy/4fe/ls/390fv1Nigo4yP4dObFBIE+TOB31+mMeWlHrDRG/ozyq5N1iRhvuYlkzUF Qo8JTBk3YK7n1FWaIngqSuGil1cMeQlH/BkDOEg9FZh/a+uAacwOgdw7yfQ3XdLajTTkUb7uZRvtS 7WylxZrX+Nof8N0P36hKmrJpAfnnTcu95vjqHL6pABVNM0/kBO9bN6QqZjfZEwJeyiBHp5Gn+LxK4 cQtJ0LoWPA4e/6Rh4CaRyOFPnEZQo8+sLTMhFVrPo2vW8QBHjwQtLYFiNWa02X6I7TIer1RgMg/BW puOGZYkQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l7g79-0006Ru-Qp; Thu, 04 Feb 2021 15:00:11 +0000 Received: from youngberry.canonical.com ([91.189.89.112]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l7g75-0006QX-6A; Thu, 04 Feb 2021 15:00:08 +0000 Received: from 1.general.cking.uk.vpn ([10.172.193.212] helo=localhost) by youngberry.canonical.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1l7g6z-0005kW-QQ; Thu, 04 Feb 2021 15:00:01 +0000 From: Colin King To: Joerg Roedel , Will Deacon , Matthias Brugger , iommu@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org Subject: [PATCH][next][V2] iommu/mediatek: Fix unsigned domid comparison with less than zero Date: Thu, 4 Feb 2021 15:00:01 +0000 Message-Id: <20210204150001.102672-1-colin.king@canonical.com> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210204_100007_333649_3387D1F9 X-CRM114-Status: GOOD ( 13.05 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org From: Colin Ian King Currently the check for domid < 0 is always false because domid is unsigned. Fix this by casting domid to an int before making the comparison. Addresses-Coverity: ("Unsigned comparison against 0") Signed-off-by: Colin Ian King Acked-by: Will Deacon --- V2: cast domid rather than making it an int. Replace L with : in the commit message. --- drivers/iommu/mtk_iommu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 0ad14a7604b1..1f262621ef19 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -645,7 +645,7 @@ static void mtk_iommu_get_resv_regions(struct device *dev, struct iommu_resv_region *region; int prot = IOMMU_WRITE | IOMMU_READ; - if (domid < 0) + if ((int)domid < 0) return; curdom = data->plat_data->iova_region + domid; for (i = 0; i < data->plat_data->iova_region_nr; i++) {