From: Yong Wu Date: Tue, 3 May 2022 07:13:55 +0000 (+0800) Subject: iommu/mediatek: Fix 2 HW sharing pgtable issue X-Git-Tag: v5.15.73~3429 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=bf45d764616a02a1dd5bd019cd5e563204b264ff;p=platform%2Fkernel%2Flinux-rpi.git iommu/mediatek: Fix 2 HW sharing pgtable issue [ Upstream commit 645b87c190c959e9bb4f216b8c4add4ee880451a ] In the commit 4f956c97d26b ("iommu/mediatek: Move domain_finalise into attach_device"), I overlooked the sharing pgtable case. After that commit, the "data" in the mtk_iommu_domain_finalise always is the data of the current IOMMU HW. Fix this for the sharing pgtable case. Only affect mt2712 which is the only SoC that share pgtable currently. Fixes: 4f956c97d26b ("iommu/mediatek: Move domain_finalise into attach_device") Signed-off-by: Yong Wu Reviewed-by: AngeloGioacchino Del Regno Reviewed-by: Matthias Brugger Link: https://lore.kernel.org/r/20220503071427.2285-5-yong.wu@mediatek.com Signed-off-by: Joerg Roedel Signed-off-by: Sasha Levin --- diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 5971a11..cf4e33d 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -451,7 +451,7 @@ static void mtk_iommu_domain_free(struct iommu_domain *domain) static int mtk_iommu_attach_device(struct iommu_domain *domain, struct device *dev) { - struct mtk_iommu_data *data = dev_iommu_priv_get(dev); + struct mtk_iommu_data *data = dev_iommu_priv_get(dev), *frstdata; struct mtk_iommu_domain *dom = to_mtk_domain(domain); struct device *m4udev = data->dev; int ret, domid; @@ -461,7 +461,10 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain, return domid; if (!dom->data) { - if (mtk_iommu_domain_finalise(dom, data, domid)) + /* Data is in the frstdata in sharing pgtable case. */ + frstdata = mtk_iommu_get_m4u_data(); + + if (mtk_iommu_domain_finalise(dom, frstdata, domid)) return -ENODEV; dom->data = data; }