diff options
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/iommu/iommu.c | 4 |
2 files changed, 3 insertions, 2 deletions
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index b3aa1f5d5321..1469ad0794f2 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -199,7 +199,6 @@ source "drivers/iommu/iommufd/Kconfig" config IRQ_REMAP bool "Support for Interrupt Remapping" depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI - select DMAR_TABLE if INTEL_IOMMU help Supports Interrupt remapping for IO-APIC and MSI devices. To use x2apic mode in the CPU's which support x2APIC enhancements or diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 879009adef40..0ad55649e2d0 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -2394,6 +2394,7 @@ static size_t iommu_pgsize(struct iommu_domain *domain, unsigned long iova, unsigned int pgsize_idx, pgsize_idx_next; unsigned long pgsizes; size_t offset, pgsize, pgsize_next; + size_t offset_end; unsigned long addr_merge = paddr | iova; /* Page sizes supported by the hardware and small enough for @size */ @@ -2434,7 +2435,8 @@ static size_t iommu_pgsize(struct iommu_domain *domain, unsigned long iova, * If size is big enough to accommodate the larger page, reduce * the number of smaller pages. */ - if (offset + pgsize_next <= size) + if (!check_add_overflow(offset, pgsize_next, &offset_end) && + offset_end <= size) size = offset; out_set_count: |