From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Roedel Date: Thu, 04 Feb 2021 13:31:48 +0000 Subject: Re: [PATCH][next] iommu/mediatek: Fix unsigned domid comparison with less than zero Message-Id: <20210204133148.GA27686@8bytes.org> List-Id: References: <20210203135936.23016-1-colin.king@canonical.com> <20210204092558.GA20244@willie-the-truck> In-Reply-To: <20210204092558.GA20244@willie-the-truck> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Will Deacon Cc: Anan sun , kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org, Tomasz Figa , Chao Hao , iommu@lists.linux-foundation.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Matthias Brugger , Colin King , Yong Wu On Thu, Feb 04, 2021 at 09:25:58AM +0000, Will Deacon wrote: > On Wed, Feb 03, 2021 at 01:59:36PM +0000, Colin King wrote: > > From: Colin Ian King > > > > Currently the check for domid < 0 is always false because domid > > is unsigned. Fix this by making it signed. > > > > Addresses-CoverityL ("Unsigned comparison against 0") > > Typo here ('L' instead of ':') > > > Fixes: ab1d5281a62b ("iommu/mediatek: Add iova reserved function") > > Signed-off-by: Colin Ian King > > --- > > 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..823d719945b2 100644 > > --- a/drivers/iommu/mtk_iommu.c > > +++ b/drivers/iommu/mtk_iommu.c > > @@ -640,7 +640,7 @@ static void mtk_iommu_get_resv_regions(struct device *dev, > > struct list_head *head) > > { > > struct mtk_iommu_data *data = dev_iommu_priv_get(dev); > > - unsigned int domid = mtk_iommu_get_domain_id(dev, data->plat_data), i; > > + int domid = mtk_iommu_get_domain_id(dev, data->plat_data), i; > > Not sure if it's intentional, but this also makes 'i' signed. It probably > should remain 'unsigned' to match 'iova_region_nr' in > 'struct mtk_iommu_plat_data'. Yes, 'i' should stay unsigned. Colin, can you please fix that up and re-send? Thanks, Joerg 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=-15.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 DD187C433DB for ; Thu, 4 Feb 2021 13:32:03 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (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 31F7564F4E for ; Thu, 4 Feb 2021 13:32:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 31F7564F4E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=8bytes.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id DDF9586ACE; Thu, 4 Feb 2021 13:32:02 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id f6PJhfMSWgL4; Thu, 4 Feb 2021 13:32:02 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by whitealder.osuosl.org (Postfix) with ESMTP id 0A6EE868D4; Thu, 4 Feb 2021 13:32:02 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id D9246C07FD; Thu, 4 Feb 2021 13:32:01 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id 3F986C013A for ; Thu, 4 Feb 2021 13:32:00 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id 380048712E for ; Thu, 4 Feb 2021 13:32:00 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id JYjDjTSc29tz for ; Thu, 4 Feb 2021 13:31:58 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from theia.8bytes.org (8bytes.org [81.169.241.247]) by hemlock.osuosl.org (Postfix) with ESMTPS id E0A1587118 for ; Thu, 4 Feb 2021 13:31:57 +0000 (UTC) Received: by theia.8bytes.org (Postfix, from userid 1000) id 8F0DE387; Thu, 4 Feb 2021 14:31:55 +0100 (CET) Date: Thu, 4 Feb 2021 14:31:48 +0100 From: Joerg Roedel To: Will Deacon Subject: Re: [PATCH][next] iommu/mediatek: Fix unsigned domid comparison with less than zero Message-ID: <20210204133148.GA27686@8bytes.org> References: <20210203135936.23016-1-colin.king@canonical.com> <20210204092558.GA20244@willie-the-truck> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210204092558.GA20244@willie-the-truck> User-Agent: Mutt/1.10.1 (2018-07-13) Cc: Anan sun , kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org, Chao Hao , iommu@lists.linux-foundation.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Matthias Brugger , Colin King X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On Thu, Feb 04, 2021 at 09:25:58AM +0000, Will Deacon wrote: > On Wed, Feb 03, 2021 at 01:59:36PM +0000, Colin King wrote: > > From: Colin Ian King > > > > Currently the check for domid < 0 is always false because domid > > is unsigned. Fix this by making it signed. > > > > Addresses-CoverityL ("Unsigned comparison against 0") > > Typo here ('L' instead of ':') > > > Fixes: ab1d5281a62b ("iommu/mediatek: Add iova reserved function") > > Signed-off-by: Colin Ian King > > --- > > 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..823d719945b2 100644 > > --- a/drivers/iommu/mtk_iommu.c > > +++ b/drivers/iommu/mtk_iommu.c > > @@ -640,7 +640,7 @@ static void mtk_iommu_get_resv_regions(struct device *dev, > > struct list_head *head) > > { > > struct mtk_iommu_data *data = dev_iommu_priv_get(dev); > > - unsigned int domid = mtk_iommu_get_domain_id(dev, data->plat_data), i; > > + int domid = mtk_iommu_get_domain_id(dev, data->plat_data), i; > > Not sure if it's intentional, but this also makes 'i' signed. It probably > should remain 'unsigned' to match 'iova_region_nr' in > 'struct mtk_iommu_plat_data'. Yes, 'i' should stay unsigned. Colin, can you please fix that up and re-send? Thanks, Joerg _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu 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=-15.6 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_SANE_1 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 2C985C433DB for ; Thu, 4 Feb 2021 13:32:13 +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 7BF2264F4E for ; Thu, 4 Feb 2021 13:32:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7BF2264F4E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=8bytes.org 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:In-Reply-To:MIME-Version:References:Message-ID: Subject:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=GAWsVjqtvHlMJLkMZf+WkmKz9IfkyYoedHHt8ecTE8Q=; b=RZ0HMzJUt5ciGBLvHJZa3ywQc jLQ8ww2lgO47Yvco00/JJlCjE2soi/MpgF1/wuXxw/G8JDiCK/xprFqfiVEaQaq4KUpqpe40N4r/B jBddZLiqA4Jj3EO1aWoRt4maOofBbWvybcUVN/5d6WocEbI7aymxHh93Gonoj4ZY76qvYImjiVqtu 2JclyiiLclMe5daOSuPCZB36pJ3VH6JSBzSCHsDhyTlKL4YK7VfiO5beQRBCZiH8tMUQET+5dgKhY jMHq+9DPy+D0AgWGZYFs9tnD/MEBifckLex9dUei4IxYZcbCjVs2AzIHdUuGHiXrhp//ZvIaSvFJV daedMOgRQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l7ejr-0006nZ-6I; Thu, 04 Feb 2021 13:32:03 +0000 Received: from 8bytes.org ([2a01:238:4383:600:38bc:a715:4b6d:a889] helo=theia.8bytes.org) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l7ejo-0006n0-1l; Thu, 04 Feb 2021 13:32:01 +0000 Received: by theia.8bytes.org (Postfix, from userid 1000) id 8F0DE387; Thu, 4 Feb 2021 14:31:55 +0100 (CET) Date: Thu, 4 Feb 2021 14:31:48 +0100 From: Joerg Roedel To: Will Deacon Subject: Re: [PATCH][next] iommu/mediatek: Fix unsigned domid comparison with less than zero Message-ID: <20210204133148.GA27686@8bytes.org> References: <20210203135936.23016-1-colin.king@canonical.com> <20210204092558.GA20244@willie-the-truck> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210204092558.GA20244@willie-the-truck> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210204_083200_255717_5F743CA1 X-CRM114-Status: GOOD ( 21.98 ) 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: Anan sun , kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org, Tomasz Figa , Chao Hao , iommu@lists.linux-foundation.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Matthias Brugger , Colin King , Yong Wu Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org On Thu, Feb 04, 2021 at 09:25:58AM +0000, Will Deacon wrote: > On Wed, Feb 03, 2021 at 01:59:36PM +0000, Colin King wrote: > > From: Colin Ian King > > > > Currently the check for domid < 0 is always false because domid > > is unsigned. Fix this by making it signed. > > > > Addresses-CoverityL ("Unsigned comparison against 0") > > Typo here ('L' instead of ':') > > > Fixes: ab1d5281a62b ("iommu/mediatek: Add iova reserved function") > > Signed-off-by: Colin Ian King > > --- > > 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..823d719945b2 100644 > > --- a/drivers/iommu/mtk_iommu.c > > +++ b/drivers/iommu/mtk_iommu.c > > @@ -640,7 +640,7 @@ static void mtk_iommu_get_resv_regions(struct device *dev, > > struct list_head *head) > > { > > struct mtk_iommu_data *data = dev_iommu_priv_get(dev); > > - unsigned int domid = mtk_iommu_get_domain_id(dev, data->plat_data), i; > > + int domid = mtk_iommu_get_domain_id(dev, data->plat_data), i; > > Not sure if it's intentional, but this also makes 'i' signed. It probably > should remain 'unsigned' to match 'iova_region_nr' in > 'struct mtk_iommu_plat_data'. Yes, 'i' should stay unsigned. Colin, can you please fix that up and re-send? Thanks, Joerg _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek 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=-15.6 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_SANE_1 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 60971C433E0 for ; Thu, 4 Feb 2021 13:33:19 +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 CF07B64DFA for ; Thu, 4 Feb 2021 13:33:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CF07B64DFA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=8bytes.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=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:In-Reply-To:MIME-Version:References:Message-ID: Subject:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=BPSZRCm/vpYDCe1V36Mjc77vRaN7lQsGL9hmpyml8pY=; b=oZ3cL839LG0t/q2DDbxzp4Y/J vo7vUv/NsIEAVfiTgUNLelxQi4PR4aTk2YfZYKegQS4yvvPJR2TemMrxsU1xQMEJcN6Xt3vDZ1BUP +JyEBKJkQtVy0+um0o4h7eM8RFKnZhmzOLwpqhJvSqt0ZUBuPTJ45Wwl41T0fYwBgPeq8bkY99yKO mwQyaWLiHb0SRMtcmf32RHad1IO3nNZTEkmXRrNl8zt+Ty8SApB/mJiWliksV3M2Y1hZCgDjTFffL y3dU4yYV1Rh+oL0+wxvbJOvKYdzBmZ5fEqTWDaeu4MLKfc4bqmxoWeU4YT9g9ogjoFghliVU3XgyN OgSxS8jSA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l7ejq-0006nP-1h; Thu, 04 Feb 2021 13:32:02 +0000 Received: from 8bytes.org ([2a01:238:4383:600:38bc:a715:4b6d:a889] helo=theia.8bytes.org) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l7ejo-0006n0-1l; Thu, 04 Feb 2021 13:32:01 +0000 Received: by theia.8bytes.org (Postfix, from userid 1000) id 8F0DE387; Thu, 4 Feb 2021 14:31:55 +0100 (CET) Date: Thu, 4 Feb 2021 14:31:48 +0100 From: Joerg Roedel To: Will Deacon Subject: Re: [PATCH][next] iommu/mediatek: Fix unsigned domid comparison with less than zero Message-ID: <20210204133148.GA27686@8bytes.org> References: <20210203135936.23016-1-colin.king@canonical.com> <20210204092558.GA20244@willie-the-truck> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210204092558.GA20244@willie-the-truck> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210204_083200_255717_5F743CA1 X-CRM114-Status: GOOD ( 21.98 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Anan sun , kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org, Tomasz Figa , Chao Hao , iommu@lists.linux-foundation.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Matthias Brugger , Colin King , Yong Wu Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Feb 04, 2021 at 09:25:58AM +0000, Will Deacon wrote: > On Wed, Feb 03, 2021 at 01:59:36PM +0000, Colin King wrote: > > From: Colin Ian King > > > > Currently the check for domid < 0 is always false because domid > > is unsigned. Fix this by making it signed. > > > > Addresses-CoverityL ("Unsigned comparison against 0") > > Typo here ('L' instead of ':') > > > Fixes: ab1d5281a62b ("iommu/mediatek: Add iova reserved function") > > Signed-off-by: Colin Ian King > > --- > > 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..823d719945b2 100644 > > --- a/drivers/iommu/mtk_iommu.c > > +++ b/drivers/iommu/mtk_iommu.c > > @@ -640,7 +640,7 @@ static void mtk_iommu_get_resv_regions(struct device *dev, > > struct list_head *head) > > { > > struct mtk_iommu_data *data = dev_iommu_priv_get(dev); > > - unsigned int domid = mtk_iommu_get_domain_id(dev, data->plat_data), i; > > + int domid = mtk_iommu_get_domain_id(dev, data->plat_data), i; > > Not sure if it's intentional, but this also makes 'i' signed. It probably > should remain 'unsigned' to match 'iova_region_nr' in > 'struct mtk_iommu_plat_data'. Yes, 'i' should stay unsigned. Colin, can you please fix that up and re-send? Thanks, Joerg _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel 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=-15.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 B2E2CC433E0 for ; Thu, 4 Feb 2021 13:33:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 668E464DFA for ; Thu, 4 Feb 2021 13:33:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236349AbhBDNcv (ORCPT ); Thu, 4 Feb 2021 08:32:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41886 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235605AbhBDNcl (ORCPT ); Thu, 4 Feb 2021 08:32:41 -0500 Received: from theia.8bytes.org (8bytes.org [IPv6:2a01:238:4383:600:38bc:a715:4b6d:a889]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 970A5C061573 for ; Thu, 4 Feb 2021 05:31:59 -0800 (PST) Received: by theia.8bytes.org (Postfix, from userid 1000) id 8F0DE387; Thu, 4 Feb 2021 14:31:55 +0100 (CET) Date: Thu, 4 Feb 2021 14:31:48 +0100 From: Joerg Roedel To: Will Deacon Cc: Colin King , Matthias Brugger , Anan sun , Yong Wu , Chao Hao , Tomasz Figa , iommu@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH][next] iommu/mediatek: Fix unsigned domid comparison with less than zero Message-ID: <20210204133148.GA27686@8bytes.org> References: <20210203135936.23016-1-colin.king@canonical.com> <20210204092558.GA20244@willie-the-truck> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210204092558.GA20244@willie-the-truck> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Feb 04, 2021 at 09:25:58AM +0000, Will Deacon wrote: > On Wed, Feb 03, 2021 at 01:59:36PM +0000, Colin King wrote: > > From: Colin Ian King > > > > Currently the check for domid < 0 is always false because domid > > is unsigned. Fix this by making it signed. > > > > Addresses-CoverityL ("Unsigned comparison against 0") > > Typo here ('L' instead of ':') > > > Fixes: ab1d5281a62b ("iommu/mediatek: Add iova reserved function") > > Signed-off-by: Colin Ian King > > --- > > 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..823d719945b2 100644 > > --- a/drivers/iommu/mtk_iommu.c > > +++ b/drivers/iommu/mtk_iommu.c > > @@ -640,7 +640,7 @@ static void mtk_iommu_get_resv_regions(struct device *dev, > > struct list_head *head) > > { > > struct mtk_iommu_data *data = dev_iommu_priv_get(dev); > > - unsigned int domid = mtk_iommu_get_domain_id(dev, data->plat_data), i; > > + int domid = mtk_iommu_get_domain_id(dev, data->plat_data), i; > > Not sure if it's intentional, but this also makes 'i' signed. It probably > should remain 'unsigned' to match 'iova_region_nr' in > 'struct mtk_iommu_plat_data'. Yes, 'i' should stay unsigned. Colin, can you please fix that up and re-send? Thanks, Joerg