# \[PATCH v1 15/16\] dma-mapping: return error code from dma\_dummy\_map\_sg() - From: Logan Gunthorpe \ - Date: 2021-07-15 16:48:01 - List: linux-arm-kernel - Page: https://ratatoskr.run/linux-arm-kernel/2021/07/1445854 - Thread: https://ratatoskr.run/linux-alpha/2021/07/1445836/t.md ```text From: Martin Oliveira The .map_sg() op now expects an error code instead of zero on failure. The only errno to return is -ENODEV in the case when DMA is not supported. Signed-off-by: Martin Oliveira Signed-off-by: Logan Gunthorpe --- kernel/dma/dummy.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/dma/dummy.c b/kernel/dma/dummy.c index eacd4c5b10bf..ae9abebed0c4 100644 --- a/kernel/dma/dummy.c +++ b/kernel/dma/dummy.c @@ -22,7 +22,7 @@ static int dma_dummy_map_sg(struct device *dev, struct scatterlist *sgl, int nelems, enum dma_data_direction dir, unsigned long attrs) { - return 0; + return -ENODEV; } static int dma_dummy_supported(struct device *hwdev, u64 mask) -- 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ```