[v3,09/21] MIPS/jazzdma: return error code from jazz_dma_map_sg()

Commit Message

Logan Gunthorpe July 29, 2021, 8:15 p.m. UTC

From: Martin Oliveira <[e-mail]>

The .map_sg() op now expects an error code instead of zero on failure.

vdma_alloc() may fail for different reasons, but since it only supports
indicating an error via a return of DMA_MAPPING_ERROR, we coalesce the
different reasons into -EIO as is documented on dma_map_sgtable().

Signed-off-by: Martin Oliveira <[e-mail]>
Signed-off-by: Logan Gunthorpe <[e-mail]>
Cc: Thomas Bogendoerfer <[e-mail]>
---
 arch/mips/jazz/jazzdma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch

diff --git a/arch/mips/jazz/jazzdma.c b/arch/mips/jazz/jazzdma.c
index 461457b28982..eabddb89d221 100644
--- a/arch/mips/jazz/jazzdma.c
+++ b/arch/mips/jazz/jazzdma.c
@@ -552,7 +552,7 @@  static int jazz_dma_map_sg(struct device *dev, struct scatterlist *sglist,
 				dir);
 		sg->dma_address = vdma_alloc(sg_phys(sg), sg->length);
 		if (sg->dma_address == DMA_MAPPING_ERROR)
-			return 0;
+			return -EIO;
 		sg_dma_len(sg) = sg->length;
 	}