arm64: Remove pointless WARN_ON in DMA teardown

[linux.git] / arch / arm64 / mm / dma-mapping.c

diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
index 3f74d0d98de63322b15b387cb967009db17079ff..aa6c8f834d9e43927683a17f16f4bd9d53e167ec 100644 (file)
--- a/arch/arm64/mm/dma-mapping.c
+++ b/arch/arm64/mm/dma-mapping.c
@@ -938,11 +938,6 @@ static void __iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
 
 void arch_teardown_dma_ops(struct device *dev)
 {
-       struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
-
-       if (WARN_ON(domain))
-               iommu_detach_device(domain, dev);
-
        dev->archdata.dma_ops = NULL;
 }