1 files changed, 6 insertions, 2 deletions

diff --git a/arch/sparc64/kernel/iommu_common.c b/arch/sparc64/kernel/iommu_common.c
index efd5dff85f60..72a4acfe8c7b 100644
--- a/arch/sparc64/kernel/iommu_common.c
+++ b/arch/sparc64/kernel/iommu_common.c
@@ -4,6 +4,7 @@
  * Copyright (C) 1999 David S. Miller (davem@redhat.com)
  */
 
+#include <linux/dma-mapping.h>
 #include "iommu_common.h"
 
 /* You are _strongly_ advised to enable the following debugging code
@@ -201,21 +202,24 @@ void verify_sglist(struct scatterlist *sglist, int nents, iopte_t *iopte, int np
 }
 #endif
 
-unsigned long prepare_sg(struct scatterlist *sg, int nents)
+unsigned long prepare_sg(struct device *dev, struct scatterlist *sg, int nents)
 {
         struct scatterlist *dma_sg = sg;
         unsigned long prev;
         u32 dent_addr, dent_len;
+        unsigned int max_seg_size;
 
         prev  = (unsigned long) sg_virt(sg);
         prev += (unsigned long) (dent_len = sg->length);
         dent_addr = (u32) ((unsigned long)(sg_virt(sg)) & (IO_PAGE_SIZE - 1UL));
+        max_seg_size = dma_get_max_seg_size(dev);
         while (--nents) {
                 unsigned long addr;
 
                 sg = sg_next(sg);
                 addr = (unsigned long) sg_virt(sg);
-                if (! VCONTIG(prev, addr)) {
+                if (! VCONTIG(prev, addr) ||
+                        dent_len + sg->length > max_seg_size) {
                         dma_sg->dma_address = dent_addr;
                         dma_sg->dma_length = dent_len;
                         dma_sg = sg_next(dma_sg);