Re: [PATCH v2] iommu: rockchip: Fix physical address decoding

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Le 18/06/2021 à 15:00, Benjamin Gaignard a écrit :
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@xxxxxxxxxx>
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@xxxxxxxxxxxxx>

Gentle ping on this patch :-)

Regards,
Benjamin

---
  drivers/iommu/rockchip-iommu.c | 6 ++++--
  1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index 94b9d8e5b9a40..9febfb7f3025b 100644
--- 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)



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