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| author | Arnd Bergmann <arnd@arndb.de> | 2015-01-30 22:55:55 +0100 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2015-02-03 18:53:27 +0100 |
| commit | a4188beee59763b3507939968677776561adbba5 (patch) | |
| tree | 1050db4e7ed8898fa6b23fd9e0ee01834201377e | |
| parent | 16753322983bcca0eca6d81f20d23277df0d6cf7 (diff) | |
| download | linux-a4188beee59763b3507939968677776561adbba5.tar.bz2 | |
iommu/arm-smmu: Avoid build warning
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: 859a732e4f713 ("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>
| -rw-r--r-- | drivers/iommu/arm-smmu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 1d6d43bb3395..fc13dd56953e 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -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); } |