crypto: atmel-sha - create function to get an Atmel SHA device

This is a transitional patch: it creates the atmel_sha_find_dev() function,
which will be used in further patches to share the source code responsible
for finding a Atmel SHA device.

Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/atmel-sha.c b/drivers/crypto/atmel-sha.c
index 97e34799e077cacf80140c024f360cb23a92d1b0..33a36e6675472fca2027dc97ea6f397e8df803dd 100644 (file)
--- a/drivers/crypto/atmel-sha.c
+++ b/drivers/crypto/atmel-sha.c
@@ -260,11 +260,8 @@ static void atmel_sha_fill_padding(struct atmel_sha_reqctx *ctx, int length)
        }
 }
 
-static int atmel_sha_init(struct ahash_request *req)
+static struct atmel_sha_dev *atmel_sha_find_dev(struct atmel_sha_ctx *tctx)
 {
-       struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
-       struct atmel_sha_ctx *tctx = crypto_ahash_ctx(tfm);
-       struct atmel_sha_reqctx *ctx = ahash_request_ctx(req);
        struct atmel_sha_dev *dd = NULL;
        struct atmel_sha_dev *tmp;
 
@@ -281,6 +278,16 @@ static int atmel_sha_init(struct ahash_request *req)
 
        spin_unlock_bh(&atmel_sha.lock);
 
+       return dd;
+}
+
+static int atmel_sha_init(struct ahash_request *req)
+{
+       struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+       struct atmel_sha_ctx *tctx = crypto_ahash_ctx(tfm);
+       struct atmel_sha_reqctx *ctx = ahash_request_ctx(req);
+       struct atmel_sha_dev *dd = atmel_sha_find_dev(tctx);
+
        ctx->dd = dd;
 
        ctx->flags = 0;