[PATCH v4 1/2] crypto: talitos - reorder code in talitos_edesc_alloc()

[Christophe Leroy]

This patch moves the mapping of IV after the kmalloc(). This
avoids having to unmap in case kmalloc() fails.

Signed-off-by: Christophe Leroy <christophe.le...@c-s.fr>
---
 new in v4

 drivers/crypto/talitos.c | 25 +++++++------------------
 1 file changed, 7 insertions(+), 18 deletions(-)

diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c
index 45e20707cef8..54d80e7edb86 100644
--- a/drivers/crypto/talitos.c
+++ b/drivers/crypto/talitos.c
@@ -1361,23 +1361,18 @@ static struct talitos_edesc *talitos_edesc_alloc(struct 
device *dev,
        struct talitos_private *priv = dev_get_drvdata(dev);
        bool is_sec1 = has_ftr_sec1(priv);
        int max_len = is_sec1 ? TALITOS1_MAX_DATA_LEN : TALITOS2_MAX_DATA_LEN;
-       void *err;
 
        if (cryptlen + authsize > max_len) {
                dev_err(dev, "length exceeds h/w max limit\n");
                return ERR_PTR(-EINVAL);
        }
 
-       if (ivsize)
-               iv_dma = dma_map_single(dev, iv, ivsize, DMA_TO_DEVICE);
-
        if (!dst || dst == src) {
                src_len = assoclen + cryptlen + authsize;
                src_nents = sg_nents_for_len(src, src_len);
                if (src_nents < 0) {
                        dev_err(dev, "Invalid number of src SG.\n");
-                       err = ERR_PTR(-EINVAL);
-                       goto error_sg;
+                       return ERR_PTR(-EINVAL);
                }
                src_nents = (src_nents == 1) ? 0 : src_nents;
                dst_nents = dst ? src_nents : 0;
@@ -1387,16 +1382,14 @@ static struct talitos_edesc *talitos_edesc_alloc(struct 
device *dev,
                src_nents = sg_nents_for_len(src, src_len);
                if (src_nents < 0) {
                        dev_err(dev, "Invalid number of src SG.\n");
-                       err = ERR_PTR(-EINVAL);
-                       goto error_sg;
+                       return ERR_PTR(-EINVAL);
                }
                src_nents = (src_nents == 1) ? 0 : src_nents;
                dst_len = assoclen + cryptlen + (encrypt ? authsize : 0);
                dst_nents = sg_nents_for_len(dst, dst_len);
                if (dst_nents < 0) {
                        dev_err(dev, "Invalid number of dst SG.\n");
-                       err = ERR_PTR(-EINVAL);
-                       goto error_sg;
+                       return ERR_PTR(-EINVAL);
                }
                dst_nents = (dst_nents == 1) ? 0 : dst_nents;
        }
@@ -1425,10 +1418,10 @@ static struct talitos_edesc *talitos_edesc_alloc(struct 
device *dev,
                alloc_len += sizeof(struct talitos_desc);
 
        edesc = kmalloc(alloc_len, GFP_DMA | flags);
-       if (!edesc) {
-               err = ERR_PTR(-ENOMEM);
-               goto error_sg;
-       }
+       if (!edesc)
+               return ERR_PTR(-ENOMEM);
+       if (ivsize)
+               iv_dma = dma_map_single(dev, iv, ivsize, DMA_TO_DEVICE);
        memset(&edesc->desc, 0, sizeof(edesc->desc));
 
        edesc->src_nents = src_nents;
@@ -1445,10 +1438,6 @@ static struct talitos_edesc *talitos_edesc_alloc(struct 
device *dev,
                                                     DMA_BIDIRECTIONAL);
        }
        return edesc;
-error_sg:
-       if (iv_dma)
-               dma_unmap_single(dev, iv_dma, ivsize, DMA_TO_DEVICE);
-       return err;
 }
 
 static struct talitos_edesc *aead_edesc_alloc(struct aead_request *areq, u8 
*iv,
-- 
2.13.3