Commit 5e42b78c authored Oct 10, 2018 by Patrick Daly

iommu: dma-iommu: Handle error case properly



If there is not enough available iova space, do not apply the
workaround to map guard pages to meet hw alignment requirement.

Change-Id: I07ed8389c61602603d002cbd1381c79770a4928b
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>

parent f6347714

drivers/iommu/dma-iommu.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -451,7 +451,7 @@ static dma_addr_t iommu_dma_alloc_iova(struct iommu_domain *domain,

		ret_iova = (dma_addr_t)iova << shift;

		if (guard_len &&
		if (ret_iova && guard_len &&
		iommu_map(domain, ret_iova + size,
		page_to_phys(cookie->guard_page),
		guard_len, ARM_SMMU_GUARD_PROT)) {