[PATCH] crypto: hisilicon - Fix return value check in hisi_zip_acompress()

[Yunfeng Ye]

The return valude of add_comp_head() is int, but @head_size is size_t,
which is a unsigned type.

        size_t head_size;
        ...
        if (head_size < 0)  // it will never work
                return -ENOMEM

Modify the type of @head_size to int, then change the type to size_t
when invoke hisi_zip_create_req() as a parameter.

Fixes: 62c455ca853e ("crypto: hisilicon - add HiSilicon ZIP accelerator 
support")
Signed-off-by: Yunfeng Ye <yeyunf...@huawei.com>
---
 drivers/crypto/hisilicon/zip/zip_crypto.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/hisilicon/zip/zip_crypto.c 
b/drivers/crypto/hisilicon/zip/zip_crypto.c
index 5a3f84d..5902354 100644
--- a/drivers/crypto/hisilicon/zip/zip_crypto.c
+++ b/drivers/crypto/hisilicon/zip/zip_crypto.c
@@ -559,7 +559,7 @@ static int hisi_zip_acompress(struct acomp_req *acomp_req)
        struct hisi_zip_ctx *ctx = crypto_tfm_ctx(acomp_req->base.tfm);
        struct hisi_zip_qp_ctx *qp_ctx = &ctx->qp_ctx[QPC_COMP];
        struct hisi_zip_req *req;
-       size_t head_size;
+       int head_size;
        int ret;

        /* let's output compression head now */
@@ -567,7 +567,7 @@ static int hisi_zip_acompress(struct acomp_req *acomp_req)
        if (head_size < 0)
                return -ENOMEM;

-       req = hisi_zip_create_req(acomp_req, qp_ctx, head_size, true);
+       req = hisi_zip_create_req(acomp_req, qp_ctx, (size_t)head_size, true);
        if (IS_ERR(req))
                return PTR_ERR(req);

-- 
2.7.4.huawei.3