The domain->geometry.aperture_end specifies the last valid address treat it as such when checking if a DMA address is valid. Reviewed-by: Pierre Morel <pmorel@xxxxxxxxxxxxx> Reviewed-by: Matthew Rosato <mjrosato@xxxxxxxxxxxxx> Signed-off-by: Niklas Schnelle <schnelle@xxxxxxxxxxxxx> --- drivers/iommu/s390-iommu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/s390-iommu.c b/drivers/iommu/s390-iommu.c index 65835a5ca328..a4c6a1a63fef 100644 --- a/drivers/iommu/s390-iommu.c +++ b/drivers/iommu/s390-iommu.c @@ -208,7 +208,7 @@ static int s390_iommu_update_trans(struct s390_domain *s390_domain, int rc = 0; if (dma_addr < s390_domain->domain.geometry.aperture_start || - dma_addr + size > s390_domain->domain.geometry.aperture_end) + (dma_addr + size - 1) > s390_domain->domain.geometry.aperture_end) return -EINVAL; nr_pages = PAGE_ALIGN(size) >> PAGE_SHIFT; -- 2.34.1
