The call to dma_sync_single_for_device() can be reached from dma_map_single(). If CONFIG_DMA_API_DEBUG is enabled this would result in a check that the mapping being synced is valid. Since the call to dma_map_single is not yet completed the mapping is not recorded in dma-debug and the check fails and a warning is printed. Avoid this warning by calling __dma_sync_single_for_device() which don't preform this check.
Signed-off-by: Niklas Söderlund <[email protected]> --- drivers/iommu/io-pgtable-arm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c index f433b51..3da8102 100644 --- a/drivers/iommu/io-pgtable-arm.c +++ b/drivers/iommu/io-pgtable-arm.c @@ -255,7 +255,7 @@ static void __arm_lpae_set_pte(arm_lpae_iopte *ptep, arm_lpae_iopte pte, *ptep = pte; if (!selftest_running) - dma_sync_single_for_device(cfg->iommu_dev, + __dma_sync_single_for_device(cfg->iommu_dev, __arm_lpae_dma_addr(ptep), sizeof(pte), DMA_TO_DEVICE); } -- 2.8.2
