crypto: hisilicon - add a lock for the qp send operation

Apply for a lock before the qp send operation to ensure no
resource race in multi-concurrency situations.

This modification has almost no impact on performance.

Signed-off-by: Chenghai Huang <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>

Author: Chenghai Huang

drivers/crypto/hisilicon/hpre/hpre_crypto.c

@@ -575,7 +575,9 @@ static int hpre_send(struct hpre_ctx *ctx, struct hpre_sqe *msg)
 
 	do {
 		atomic64_inc(&dfx[HPRE_SEND_CNT].value);
+		spin_lock_bh(&ctx->req_lock);
 		ret = hisi_qp_send(ctx->qp, msg);
+		spin_unlock_bh(&ctx->req_lock);
 		if (ret != -EBUSY)
 			break;
 		atomic64_inc(&dfx[HPRE_SEND_BUSY_CNT].value);

drivers/crypto/hisilicon/zip/zip_crypto.c

@@ -213,6 +213,7 @@ static int hisi_zip_do_work(struct hisi_zip_qp_ctx *qp_ctx,
 {
 	struct hisi_acc_sgl_pool *pool = qp_ctx->sgl_pool;
 	struct hisi_zip_dfx *dfx = &qp_ctx->zip_dev->dfx;
+	struct hisi_zip_req_q *req_q = &qp_ctx->req_q;
 	struct acomp_req *a_req = req->req;
 	struct hisi_qp *qp = qp_ctx->qp;
 	struct device *dev = &qp->qm->pdev->dev;
@@ -244,7 +245,9 @@ static int hisi_zip_do_work(struct hisi_zip_qp_ctx *qp_ctx,
 
 	/* send command to start a task */
 	atomic64_inc(&dfx->send_cnt);
+	spin_lock_bh(&req_q->req_lock);
 	ret = hisi_qp_send(qp, &zip_sqe);
+	spin_unlock_bh(&req_q->req_lock);
 	if (unlikely(ret < 0)) {
 		atomic64_inc(&dfx->send_busy_cnt);
 		ret = -EAGAIN;