--- zzzz-none-000/linux-3.10.107/drivers/crypto/caam/sg_sw_sec4.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/crypto/caam/sg_sw_sec4.h	2021-02-04 17:41:59.000000000 +0000
@@ -15,7 +15,6 @@
 {
 	sec4_sg_ptr->ptr = dma;
 	sec4_sg_ptr->len = len;
-	sec4_sg_ptr->reserved = 0;
 	sec4_sg_ptr->buf_pool_id = 0;
 	sec4_sg_ptr->offset = offset;
 #ifdef DEBUG
@@ -37,7 +36,7 @@
 		dma_to_sec4_sg_one(sec4_sg_ptr, sg_dma_address(sg),
 				   sg_dma_len(sg), offset);
 		sec4_sg_ptr++;
-		sg = scatterwalk_sg_next(sg);
+		sg = sg_next(sg);
 		sg_count--;
 	}
 	return sec4_sg_ptr - 1;
@@ -55,102 +54,28 @@
 	sec4_sg_ptr->len |= SEC4_SG_LEN_FIN;
 }
 
-/* count number of elements in scatterlist */
-static inline int __sg_count(struct scatterlist *sg_list, int nbytes,
-			     bool *chained)
+static inline struct sec4_sg_entry *sg_to_sec4_sg_len(
+	struct scatterlist *sg, unsigned int total,
+	struct sec4_sg_entry *sec4_sg_ptr)
 {
-	struct scatterlist *sg = sg_list;
-	int sg_nents = 0;
+	do {
+		unsigned int len = min(sg_dma_len(sg), total);
 
-	while (nbytes > 0) {
-		sg_nents++;
-		nbytes -= sg->length;
-		if (!sg_is_last(sg) && (sg + 1)->length == 0)
-			*chained = true;
-		sg = scatterwalk_sg_next(sg);
-	}
-
-	return sg_nents;
+		dma_to_sec4_sg_one(sec4_sg_ptr, sg_dma_address(sg), len, 0);
+		sec4_sg_ptr++;
+		sg = sg_next(sg);
+		total -= len;
+	} while (total);
+	return sec4_sg_ptr - 1;
 }
 
 /* derive number of elements in scatterlist, but return 0 for 1 */
-static inline int sg_count(struct scatterlist *sg_list, int nbytes,
-			     bool *chained)
+static inline int sg_count(struct scatterlist *sg_list, int nbytes)
 {
-	int sg_nents = __sg_count(sg_list, nbytes, chained);
+	int sg_nents = sg_nents_for_len(sg_list, nbytes);
 
 	if (likely(sg_nents == 1))
 		return 0;
 
 	return sg_nents;
 }
-
-static int dma_map_sg_chained(struct device *dev, struct scatterlist *sg,
-			      unsigned int nents, enum dma_data_direction dir,
-			      bool chained)
-{
-	if (unlikely(chained)) {
-		int i;
-		for (i = 0; i < nents; i++) {
-			dma_map_sg(dev, sg, 1, dir);
-			sg = scatterwalk_sg_next(sg);
-		}
-	} else {
-		dma_map_sg(dev, sg, nents, dir);
-	}
-	return nents;
-}
-
-static int dma_unmap_sg_chained(struct device *dev, struct scatterlist *sg,
-				unsigned int nents, enum dma_data_direction dir,
-				bool chained)
-{
-	if (unlikely(chained)) {
-		int i;
-		for (i = 0; i < nents; i++) {
-			dma_unmap_sg(dev, sg, 1, dir);
-			sg = scatterwalk_sg_next(sg);
-		}
-	} else {
-		dma_unmap_sg(dev, sg, nents, dir);
-	}
-	return nents;
-}
-
-/* Copy from len bytes of sg to dest, starting from beginning */
-static inline void sg_copy(u8 *dest, struct scatterlist *sg, unsigned int len)
-{
-	struct scatterlist *current_sg = sg;
-	int cpy_index = 0, next_cpy_index = current_sg->length;
-
-	while (next_cpy_index < len) {
-		memcpy(dest + cpy_index, (u8 *) sg_virt(current_sg),
-		       current_sg->length);
-		current_sg = scatterwalk_sg_next(current_sg);
-		cpy_index = next_cpy_index;
-		next_cpy_index += current_sg->length;
-	}
-	if (cpy_index < len)
-		memcpy(dest + cpy_index, (u8 *) sg_virt(current_sg),
-		       len - cpy_index);
-}
-
-/* Copy sg data, from to_skip to end, to dest */
-static inline void sg_copy_part(u8 *dest, struct scatterlist *sg,
-				      int to_skip, unsigned int end)
-{
-	struct scatterlist *current_sg = sg;
-	int sg_index, cpy_index;
-
-	sg_index = current_sg->length;
-	while (sg_index <= to_skip) {
-		current_sg = scatterwalk_sg_next(current_sg);
-		sg_index += current_sg->length;
-	}
-	cpy_index = sg_index - to_skip;
-	memcpy(dest, (u8 *) sg_virt(current_sg) +
-	       current_sg->length - cpy_index, cpy_index);
-	current_sg = scatterwalk_sg_next(current_sg);
-	if (end - sg_index)
-		sg_copy(dest + cpy_index, current_sg, end - sg_index);
-}