[PATCH v2 09/22] dma-direct: Return appropriate error code from dma_direct_map_sg()

From: Logan Gunthorpe
Date: Thu May 13 2021 - 18:33:11 EST


Now that the map_sg() op expects error codes instead of return zero on
error, convert dma_direct_map_sg() to return an error code. The
only error to return presently is EINVAL if a page could not
be mapped.

Signed-off-by: Logan Gunthorpe <logang@xxxxxxxxxxxx>
---
kernel/dma/direct.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
index f737e3347059..803ee9321170 100644
--- a/kernel/dma/direct.c
+++ b/kernel/dma/direct.c
@@ -411,7 +411,7 @@ int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, int nents,

out_unmap:
dma_direct_unmap_sg(dev, sgl, i, dir, attrs | DMA_ATTR_SKIP_CPU_SYNC);
- return 0;
+ return -EINVAL;
}

dma_addr_t dma_direct_map_resource(struct device *dev, phys_addr_t paddr,
--
2.20.1