iommu/rockchip: Fix physical address decoding

Restore bits 39 to 32 at correct position.
It reverses the operation done in rk_dma_addr_dte_v2().

Fixes: c55356c534aa ("iommu: rockchip: Add support for iommu v2")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Link: https://lore.kernel.org/r/20210712101232.318589-1-benjamin.gaignard@collabora.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index 94b9d8e..9febfb7 100644 (file)
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -544,12 +544,14 @@ static inline u32 rk_dma_addr_dte(dma_addr_t dt_dma)
 }
 
 #define DT_HI_MASK GENMASK_ULL(39, 32)
+#define DTE_BASE_HI_MASK GENMASK(11, 4)
 #define DT_SHIFT   28
 
 static inline phys_addr_t rk_dte_addr_phys_v2(u32 addr)
 {
-       return (phys_addr_t)(addr & RK_DTE_PT_ADDRESS_MASK) |
-              ((addr & DT_HI_MASK) << DT_SHIFT);
+       u64 addr64 = addr;
+       return (phys_addr_t)(addr64 & RK_DTE_PT_ADDRESS_MASK) |
+              ((addr64 & DTE_BASE_HI_MASK) << DT_SHIFT);
 }
 
 static inline u32 rk_dma_addr_dte_v2(dma_addr_t dt_dma)