linux-kernel - [PATCH v7 05/36] iommu/mediatek: Add list_del in mtk_iommu

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20220503071427.2285-6-yong.wu@mediatek.com>
Date:   Tue, 3 May 2022 15:13:56 +0800
From:   Yong Wu <yong.wu@...iatek.com>
To:     Joerg Roedel <joro@...tes.org>, Rob Herring <robh+dt@...nel.org>,
        "Matthias Brugger" <matthias.bgg@...il.com>,
        Will Deacon <will@...nel.org>
CC:     Robin Murphy <robin.murphy@....com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Tomasz Figa <tfiga@...omium.org>,
        <linux-mediatek@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <iommu@...ts.linux-foundation.org>,
        Hsin-Yi Wang <hsinyi@...omium.org>, <yong.wu@...iatek.com>,
        <youlin.pei@...iatek.com>, <anan.sun@...iatek.com>,
        <xueqi.zhang@...iatek.com>, <yen-chang.chen@...iatek.com>,
        "AngeloGioacchino Del Regno" 
        <angelogioacchino.delregno@...labora.com>,
        <mingyuan.ma@...iatek.com>, <yf.wang@...iatek.com>,
        <libo.kang@...iatek.com>, <chengci.xu@...iatek.com>
Subject: [PATCH v7 05/36] iommu/mediatek: Add list_del in mtk_iommu_remove

Lack the list_del in the mtk_iommu_remove, and remove
bus_set_iommu(*, NULL) since there may be several iommu HWs.
we can not bus_set_iommu null when one iommu driver unbind.

This could be a fix for mt2712 which support 2 M4U HW and list them.

Fixes: 7c3a2ec02806 ("iommu/mediatek: Merge 2 M4U HWs into one iommu domain")
Signed-off-by: Yong Wu <yong.wu@...iatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
 drivers/iommu/mtk_iommu.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 95c82b8bcc35..e4b4ebbcb73f 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -955,8 +955,7 @@ static int mtk_iommu_remove(struct platform_device *pdev)
 	iommu_device_sysfs_remove(&data->iommu);
 	iommu_device_unregister(&data->iommu);
 
-	if (iommu_present(&platform_bus_type))
-		bus_set_iommu(&platform_bus_type, NULL);
+	list_del(&data->list);
 
 	clk_disable_unprepare(data->bclk);
 	device_link_remove(data->smicomm_dev, &pdev->dev);
-- 
2.18.0