diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-04-12 17:21:15 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-04-12 17:21:15 +0200 |
| commit | 4876191cbe2a4702b0067d4156e1d8648ac36801 (patch) | |
| tree | 0bbcb392495738947b71b6dbf31b673a1f0d090f /drivers | |
| parent | Merge tag 'clang-format-for-linus-v5.1-rc5' of git://github.com/ojeda/linux (diff) | |
| parent | iommu/amd: Set exclusion range correctly (diff) | |
| download | linux-4876191cbe2a4702b0067d4156e1d8648ac36801.tar.xz linux-4876191cbe2a4702b0067d4156e1d8648ac36801.zip | |
Merge tag 'iommu-fix-v5.1-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU fix from Joerg Roedel:
"Fix an AMD IOMMU issue where the driver didn't correctly setup the
exclusion range in the hardware registers, resulting in exclusion
ranges being one page too big.
This can cause data corruption of the address of that last page is
used by DMA operations"
* tag 'iommu-fix-v5.1-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/amd: Set exclusion range correctly
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/iommu/amd_iommu_init.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 1b1378619fc9..ff40ba758cf3 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -359,7 +359,7 @@ static void iommu_write_l2(struct amd_iommu *iommu, u8 address, u32 val) static void iommu_set_exclusion_range(struct amd_iommu *iommu) { u64 start = iommu->exclusion_start & PAGE_MASK; - u64 limit = (start + iommu->exclusion_length) & PAGE_MASK; + u64 limit = (start + iommu->exclusion_length - 1) & PAGE_MASK; u64 entry; if (!iommu->exclusion_start) |