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

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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: 7cad800485 ("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>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Pranjal Shrivastava <praan@google.com>
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Nicolin Chen 2026-06-15 12:45:33 -07:00 committed by Will Deacon
parent 13a8629268
commit 4455286274
1 changed files with 2 additions and 2 deletions
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4
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
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@ -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);
/*