crypto: starfive - Fix nent assignment in rsa dec

Missing src scatterlist nent assignment in rsa decrypt function.
Removing all unneeded assignment and use nents value from req->src
instead.

Signed-off-by: Jia Jie Ho <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>

Author: jiajieho

drivers/crypto/starfive/jh7110-cryp.h

@@ -218,7 +218,6 @@ struct starfive_cryp_request_ctx {
 	struct scatterlist			*out_sg;
 	struct ahash_request			ahash_fbk_req;
 	size_t					total;
-	size_t					nents;
 	unsigned int				blksize;
 	unsigned int				digsize;
 	unsigned long				in_sg_len;

drivers/crypto/starfive/jh7110-rsa.c

@@ -259,7 +259,7 @@ static int starfive_rsa_enc_core(struct starfive_cryp_ctx *ctx, int enc)
 		memset(rctx->rsa_data, 0, shift);
 	}
 
-	rctx->total = sg_copy_to_buffer(rctx->in_sg, rctx->nents,
+	rctx->total = sg_copy_to_buffer(rctx->in_sg, sg_nents(rctx->in_sg),
 					rctx->rsa_data + shift, rctx->total);
 
 	if (enc) {
@@ -309,7 +309,6 @@ static int starfive_rsa_enc(struct akcipher_request *req)
 	rctx->in_sg = req->src;
 	rctx->out_sg = req->dst;
 	rctx->total = req->src_len;
-	rctx->nents = sg_nents(rctx->in_sg);
 	ctx->rctx = rctx;
 
 	return starfive_rsa_enc_core(ctx, 1);