When we enable PGTABLE_PA_35_EN, the PA for pgtable may be 35bits.
Thus add dma_mask for it.

Fixes: 301c3ca12576 ("iommu/mediatek: Allow page table PA up to 35bit")
Signed-off-by: Chengci.Xu <chengci.xu@mediatek.com>
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
 drivers/iommu/mtk_iommu.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index e0264d5f1c9a..f2716896fee4 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -1297,6 +1297,14 @@ static int mtk_iommu_probe(struct platform_device *pdev)
 			return PTR_ERR(data->bclk);
 	}
 
+	if (MTK_IOMMU_HAS_FLAG(data->plat_data, PGTABLE_PA_35_EN)) {
+		ret = dma_set_mask(dev, DMA_BIT_MASK(35));
+		if (!ret) {
+			dev_err(dev, "Failed to set dma_mask 35.\n");
+			return ret;
+		}
+	}
+
 	pm_runtime_enable(dev);
 
 	if (MTK_IOMMU_IS_TYPE(data->plat_data, MTK_IOMMU_TYPE_MM)) {
-- 
2.25.1

Il 07/03/23 09:05, Yong Wu ha scritto:
> When we enable PGTABLE_PA_35_EN, the PA for pgtable may be 35bits.
> Thus add dma_mask for it.
> 
> Fixes: 301c3ca12576 ("iommu/mediatek: Allow page table PA up to 35bit")
> Signed-off-by: Chengci.Xu <chengci.xu@mediatek.com>
> Signed-off-by: Yong Wu <yong.wu@mediatek.com>

I would send this patch separately from the MT8188 series, as that's purely a
(quite important) fix that is not specific to the introduction of MT8188, even
though that SoC needs that fix.

Regardless of that,

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>