IOMMU_DMA does indeed depend on scatterlists having a DMA length, but
the NEED_SG_DMA_LENGTH symbol should be selected, not depended upon.

Reported-by: Arnd Bergmann <a...@arndb.de>
Signed-off-by: Robin Murphy <robin.mur...@arm.com>
---
 drivers/iommu/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index b325954..83f1a65 100644
--- a/drivers/iommu/Kconfig
+++ b/drivers/iommu/Kconfig
@@ -70,9 +70,9 @@ config OF_IOMMU
 # IOMMU-agnostic DMA-mapping layer
 config IOMMU_DMA
        bool
-       depends on NEED_SG_DMA_LENGTH
        select IOMMU_API
        select IOMMU_IOVA
+       select NEED_SG_DMA_LENGTH
 
 config FSL_PAMU
        bool "Freescale IOMMU support"
-- 
2.7.2.333.g70bd996.dirty

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