[PATCH] iommu/arm-smmu-v3: Declare eats_s1chk and eats_trans as host-endian u64

[PATCH] iommu/arm-smmu-v3: Declare eats_s1chk and eats_trans as host-endian u64

[Nicolin Chen]

arm_smmu_get_ste_update_safe() declares the eats_s1chk and eats_trans
locals as __le64, but initializes them from FIELD_PREP(), which returns a
host-endian value, and passes them through cpu_to_le64() at the use sites.

Sparse reports the following warnings:

>> drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c:1122:38: sparse: sparse: cast from restricted __le64
   drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c:1124:33: sparse: sparse: cast from restricted __le64

Declare both locals as u64 so the type matches FIELD_PREP() and the
existing cpu_to_le64() at the use sites performs the host-to-little-endian
conversion. No functional change.

Fixes: 7cad80048595 ("iommu/arm-smmu-v3: Mark EATS_TRANS safe when computing the update sequence")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/all/202606151017.QU0evpH9-lkp@intel.com/
Assisted-by: Claude:claude-opus-4-8
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
---
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index 8ce3e801eda3b..4c0f7b17b1f37 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -1240,9 +1240,9 @@ VISIBLE_IF_KUNIT
 void arm_smmu_get_ste_update_safe(const __le64 *cur, const __le64 *target,
 				  __le64 *safe_bits)
 {
-	const __le64 eats_s1chk =
+	const u64 eats_s1chk =
 		FIELD_PREP(STRTAB_STE_1_EATS, STRTAB_STE_1_EATS_S1CHK);
-	const __le64 eats_trans =
+	const u64 eats_trans =
 		FIELD_PREP(STRTAB_STE_1_EATS, STRTAB_STE_1_EATS_TRANS);
 
 	/*
-- 
2.43.0