[PATCH RESEND 3/4] crypto: hisilicon/zip - fix the return value when device is busy

[Yang Shen]

As before, when the ZIP device is too busy to creat a request, it will
return '-EBUSY'. But the crypto process think the '-EBUSY' means a
successful request and wait for its completion.

So replace '-EBUSY' with '-EAGAIN' to show crypto this request is failed.

Fixes: 62c455ca853e("crypto: hisilicon - add HiSilicon ZIP...")
Signed-off-by: Yang Shen <shenyan...@huawei.com>
Reviewed-by: Zhou Wang <wangzh...@hisilicon.com>
---
 drivers/crypto/hisilicon/zip/zip_crypto.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/hisilicon/zip/zip_crypto.c 
b/drivers/crypto/hisilicon/zip/zip_crypto.c
index 48dc2fd..08b4660 100644
--- a/drivers/crypto/hisilicon/zip/zip_crypto.c
+++ b/drivers/crypto/hisilicon/zip/zip_crypto.c
@@ -498,7 +498,7 @@ static struct hisi_zip_req *hisi_zip_create_req(struct 
acomp_req *req,
        if (req_id >= req_q->size) {
                write_unlock(&req_q->req_lock);
                dev_dbg(&qp_ctx->qp->qm->pdev->dev, "req cache is full!\n");
-               return ERR_PTR(-EBUSY);
+               return ERR_PTR(-EAGAIN);
        }
        set_bit(req_id, req_q->req_bitmap);
 
@@ -564,6 +564,7 @@ static int hisi_zip_do_work(struct hisi_zip_req *req,
        ret = hisi_qp_send(qp, &zip_sqe);
        if (ret < 0) {
                atomic64_inc(&dfx->send_busy_cnt);
+               ret = -EAGAIN;
                dev_dbg_ratelimited(dev, "failed to send request!\n");
                goto err_unmap_output;
        }
-- 
2.7.4