linux-kernel - [RFC PATCH 04/17] crypto: virtio

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Message-Id: <20210517090836.533-5-xieyongji@bytedance.com>
Date:   Mon, 17 May 2021 17:08:23 +0800
From:   Xie Yongji <xieyongji@...edance.com>
To:     mst@...hat.com, jasowang@...hat.com, stefanha@...hat.com
Cc:     amit@...nel.org, arei.gonglei@...wei.com, airlied@...ux.ie,
        kraxel@...hat.com, dan.j.williams@...el.com,
        johannes@...solutions.net, ohad@...ery.com,
        bjorn.andersson@...aro.org, david@...hat.com, vgoyal@...hat.com,
        miklos@...redi.hu, sgarzare@...hat.com,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: [RFC PATCH 04/17] crypto: virtio - Remove unused used length

The used length is not used in some cases. Let's drop it
and pass NULL to virtqueue_get_buf() instead.

Signed-off-by: Xie Yongji <xieyongji@...edance.com>
---
 drivers/crypto/virtio/virtio_crypto_algs.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/crypto/virtio/virtio_crypto_algs.c b/drivers/crypto/virtio/virtio_crypto_algs.c
index 583c0b535d13..818fe31ace38 100644
--- a/drivers/crypto/virtio/virtio_crypto_algs.c
+++ b/drivers/crypto/virtio/virtio_crypto_algs.c
@@ -118,7 +118,6 @@ static int virtio_crypto_alg_skcipher_init_session(
 		int encrypt)
 {
 	struct scatterlist outhdr, key_sg, inhdr, *sgs[3];
-	unsigned int tmp;
 	struct virtio_crypto *vcrypto = ctx->vcrypto;
 	int op = encrypt ? VIRTIO_CRYPTO_OP_ENCRYPT : VIRTIO_CRYPTO_OP_DECRYPT;
 	int err;
@@ -176,7 +175,7 @@ static int virtio_crypto_alg_skcipher_init_session(
 	 * Trapping into the hypervisor, so the request should be
 	 * handled immediately.
 	 */
-	while (!virtqueue_get_buf(vcrypto->ctrl_vq, &tmp) &&
+	while (!virtqueue_get_buf(vcrypto->ctrl_vq, NULL) &&
 	       !virtqueue_is_broken(vcrypto->ctrl_vq))
 		cpu_relax();
 
@@ -206,7 +205,6 @@ static int virtio_crypto_alg_skcipher_close_session(
 		int encrypt)
 {
 	struct scatterlist outhdr, status_sg, *sgs[2];
-	unsigned int tmp;
 	struct virtio_crypto_destroy_session_req *destroy_session;
 	struct virtio_crypto *vcrypto = ctx->vcrypto;
 	int err;
@@ -245,7 +243,7 @@ static int virtio_crypto_alg_skcipher_close_session(
 	}
 	virtqueue_kick(vcrypto->ctrl_vq);
 
-	while (!virtqueue_get_buf(vcrypto->ctrl_vq, &tmp) &&
+	while (!virtqueue_get_buf(vcrypto->ctrl_vq, NULL) &&
 	       !virtqueue_is_broken(vcrypto->ctrl_vq))
 		cpu_relax();
 
-- 
2.11.0