diff mbox series

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

Message ID 5ed91db5e2976a4c260465c3d027acc9affd2d2b.1545445924.git.christophe.leroy@c-s.fr (mailing list archive)
State Accepted
Delegated to: Herbert Xu
Headers show
Series [v4,1/2] crypto: talitos - reorder code in talitos_edesc_alloc() | expand

Commit Message

Christophe Leroy Jan. 8, 2019, 6:56 a.m. UTC 
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.leroy@c-s.fr>
---
 new in v4

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

Comments

Horia Geanta Jan. 8, 2019, 9:47 a.m. UTC | #1 
On 1/8/2019 8:56 AM, Christophe Leroy wrote:
> 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.leroy@c-s.fr>
Reviewed-by: Horia Geantă <horia.geanta@nxp.com>

Since patch 2/2 is Cc-ing stable, this one should do the same.
Herbert, could you append the commit message before applying it?

Thanks,
Horia
Christophe Leroy Jan. 8, 2019, 9:51 a.m. UTC | #2 
Le 08/01/2019 à 07:56, Christophe Leroy a écrit :
> 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.leroy@c-s.fr>

Cc: stable@vger.kernel.org

> ---
>   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,
>
Herbert Xu Jan. 10, 2019, 2:05 p.m. UTC | #3 
On Tue, Jan 08, 2019 at 06:56:46AM +0000, Christophe Leroy wrote:
> 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.leroy@c-s.fr>
> ---
>  new in v4
> 
>  drivers/crypto/talitos.c | 25 +++++++------------------
>  1 file changed, 7 insertions(+), 18 deletions(-)

All applied.  Thanks.
diff mbox series

Patch

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,