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-rw-r--r--drivers/parisc/iommu-helpers.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/parisc/iommu-helpers.h b/drivers/parisc/iommu-helpers.h
index 0a1f99a2e93e..97ba8286c596 100644
--- a/drivers/parisc/iommu-helpers.h
+++ b/drivers/parisc/iommu-helpers.h
@@ -95,12 +95,14 @@ iommu_fill_pdir(struct ioc *ioc, struct scatterlist *startsg, int nents,
*/
static inline unsigned int
-iommu_coalesce_chunks(struct ioc *ioc, struct scatterlist *startsg, int nents,
+iommu_coalesce_chunks(struct ioc *ioc, struct device *dev,
+ struct scatterlist *startsg, int nents,
int (*iommu_alloc_range)(struct ioc *, size_t))
{
struct scatterlist *contig_sg; /* contig chunk head */
unsigned long dma_offset, dma_len; /* start/len of DMA stream */
unsigned int n_mappings = 0;
+ unsigned int max_seg_size = dma_get_max_seg_size(dev);
while (nents > 0) {
@@ -142,6 +144,9 @@ iommu_coalesce_chunks(struct ioc *ioc, struct scatterlist *startsg, int nents,
IOVP_SIZE) > DMA_CHUNK_SIZE))
break;
+ if (startsg->length + dma_len > max_seg_size)
+ break;
+
/*
** Next see if we can append the next chunk (i.e.
** it must end on one page and begin on another