In _bus_dmamap_addseg(), the return value must be zero for error, or the size

actually added to the segment (possibly smaller than the requested size if
boundary crossings had to be avoided).

2 files changed, 4 insertions, 4 deletions

diff --git a/sys/arm/arm/busdma_machdep-v6.c b/sys/arm/arm/busdma_machdep-v6.c
index 1ac2c97..c87f857 100644
--- a/sys/arm/arm/busdma_machdep-v6.c
+++ b/sys/arm/arm/busdma_machdep-v6.c
@@ -856,7 +856,7 @@ _bus_dmamap_addseg(bus_dma_tag_t dmat, bus_dmamap_t map, bus_addr_t curaddr,
 		    curaddr);
 		if (dr == NULL) {
 			_bus_dmamap_unload(dmat, map);
-			return (EINVAL);
+			return (0);
 		}
 		/*
 		 * In a valid DMA range.  Translate the physical
diff --git a/sys/arm/arm/busdma_machdep.c b/sys/arm/arm/busdma_machdep.c
index f31a7fe..10760b4 100644
--- a/sys/arm/arm/busdma_machdep.c
+++ b/sys/arm/arm/busdma_machdep.c
@@ -913,7 +913,7 @@ _bus_dmamap_addseg(bus_dma_tag_t dmat, bus_dmamap_t map, bus_addr_t curaddr,
 		dr = _bus_dma_inrange(dmat->ranges, dmat->_nranges,
 		    curaddr);
 		if (dr == NULL)
-			return (EINVAL);
+			return (0);
 		/*
 		 * In a valid DMA range.  Translate the physical
 		 * memory address to an address in the DMA window.
@@ -935,12 +935,12 @@ _bus_dmamap_addseg(bus_dma_tag_t dmat, bus_dmamap_t map, bus_addr_t curaddr,
 		segs[seg].ds_len += sgsize;
 	} else {
 		if (++seg >= dmat->nsegments)
-			return (EFBIG);
+			return (0);
 		segs[seg].ds_addr = curaddr;
 		segs[seg].ds_len = sgsize;
 	}
 	*segp = seg;
-	return (0);
+	return (sgsize);
 }
 
 /*