[PATCH v3 04/17] crypto: talitos - Add a helper function to clear j_extent field

[Christophe Leroy]

j_extent field is specific to SEC2 so we add a helper function to clear it
so that SEC1 can redefine that function as nop

Signed-off-by: Christophe Leroy <christophe.le...@c-s.fr>
---
 drivers/crypto/talitos.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c
index fca0aed..c93f79b 100644
--- a/drivers/crypto/talitos.c
+++ b/drivers/crypto/talitos.c
@@ -61,6 +61,11 @@ static void to_talitos_ptr(struct talitos_ptr *ptr, 
dma_addr_t dma_addr)
        ptr->eptr = upper_32_bits(dma_addr);
 }
 
+static void to_talitos_ptr_extent_clear(struct talitos_ptr *ptr)
+{
+       ptr->j_extent = 0;
+}
+
 /*
  * map virtual single (contiguous) pointer to h/w descriptor pointer
  */
@@ -1372,7 +1377,7 @@ int map_sg_in_talitos_ptr(struct device *dev, struct 
scatterlist *src,
        int sg_count;
 
        ptr->len = cpu_to_be16(len);
-       ptr->j_extent = 0;
+       to_talitos_ptr_extent_clear(ptr);
 
        sg_count = talitos_map_sg(dev, src, edesc->src_nents ? : 1, dir,
                                  edesc->src_chained);
@@ -1402,7 +1407,7 @@ void map_sg_out_talitos_ptr(struct device *dev, struct 
scatterlist *dst,
                            struct talitos_ptr *ptr, int sg_count)
 {
        ptr->len = cpu_to_be16(len);
-       ptr->j_extent = 0;
+       to_talitos_ptr_extent_clear(ptr);
 
        if (dir != DMA_NONE)
                sg_count = talitos_map_sg(dev, dst, edesc->dst_nents ? : 1,
@@ -1444,7 +1449,7 @@ static int common_nonsnoop(struct talitos_edesc *edesc,
        /* cipher iv */
        to_talitos_ptr(&desc->ptr[1], edesc->iv_dma);
        desc->ptr[1].len = cpu_to_be16(ivsize);
-       desc->ptr[1].j_extent = 0;
+       to_talitos_ptr_extent_clear(&desc->ptr[1]);
 
        /* cipher key */
        map_single_talitos_ptr(dev, &desc->ptr[2], ctx->keylen,
-- 
2.1.0

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