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iommu/arm-smmu: Avoid build warning

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ARM allmodconfig gained a new warning when dma_addr_t is 32-bit wide:

drivers/iommu/arm-smmu.c: In function 'arm_smmu_iova_to_phys_hard':
drivers/iommu/arm-smmu.c:1255:3: warning: right shift count >= width of type

This changes the calculation so that the effective type is always
64-bit.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 859a732e4f ("iommu/arm-smmu: add support for iova_to_phys through ATS1PR")
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Arnd Bergmann 2015-01-30 22:55:55 +01:00 committed by Joerg Roedel
parent 1675332298
commit a4188beee5
1 changed files with 1 additions and 1 deletions
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2
drivers/iommu/arm-smmu.c
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@ -1252,7 +1252,7 @@ static phys_addr_t arm_smmu_iova_to_phys_hard(struct iommu_domain *domain,
} else {
u32 reg = iova & ~0xfff;
writel_relaxed(reg, cb_base + ARM_SMMU_CB_ATS1PR_LO);
reg = (iova & ~0xfff) >> 32;
reg = ((u64)iova & ~0xfff) >> 32;
writel_relaxed(reg, cb_base + ARM_SMMU_CB_ATS1PR_HI);
}