[PATCH 3/6] crypto: qce: Fix dma_map_sg error check

[Jack Wang <jinpu.wang@xxxxxxxxx>]

dma_map_sg return 0 on error, fix the error check and return -EIO to
caller.

Cc: Thara Gopinath <thara.gopinath@xxxxxxxxx>
Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: linux-crypto@xxxxxxxxxxxxxxx
Cc: linux-arm-msm@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Fixes: ec8f5d8f6f76 ("crypto: qce - Qualcomm crypto engine driver")
Signed-off-by: Jack Wang <jinpu.wang@xxxxxxxxx>
---
 drivers/crypto/qce/aead.c     | 4 ++--
 drivers/crypto/qce/sha.c      | 8 +++++---
 drivers/crypto/qce/skcipher.c | 8 ++++----
 3 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/drivers/crypto/qce/aead.c b/drivers/crypto/qce/aead.c
index 97a530171f07..6eb4d2e35629 100644
--- a/drivers/crypto/qce/aead.c
+++ b/drivers/crypto/qce/aead.c
@@ -450,8 +450,8 @@ qce_aead_async_req_handle(struct crypto_async_request *async_req)
 	if (ret)
 		return ret;
 	dst_nents = dma_map_sg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst);
-	if (dst_nents < 0) {
-		ret = dst_nents;
+	if (!dst_nents) {
+		ret = -EIO;
 		goto error_free;
 	}
 
diff --git a/drivers/crypto/qce/sha.c b/drivers/crypto/qce/sha.c
index 59159f5e64e5..37bafd7aeb79 100644
--- a/drivers/crypto/qce/sha.c
+++ b/drivers/crypto/qce/sha.c
@@ -97,14 +97,16 @@ static int qce_ahash_async_req_handle(struct crypto_async_request *async_req)
 	}
 
 	ret = dma_map_sg(qce->dev, req->src, rctx->src_nents, DMA_TO_DEVICE);
-	if (ret < 0)
-		return ret;
+	if (!ret)
+		return -EIO;
 
 	sg_init_one(&rctx->result_sg, qce->dma.result_buf, QCE_RESULT_BUF_SZ);
 
 	ret = dma_map_sg(qce->dev, &rctx->result_sg, 1, DMA_FROM_DEVICE);
-	if (ret < 0)
+	if (!ret) {
+		ret = -EIO;
 		goto error_unmap_src;
+	}
 
 	ret = qce_dma_prep_sgs(&qce->dma, req->src, rctx->src_nents,
 			       &rctx->result_sg, 1, qce_ahash_done, async_req);
diff --git a/drivers/crypto/qce/skcipher.c b/drivers/crypto/qce/skcipher.c
index 3d27cd5210ef..5b493fdc1e74 100644
--- a/drivers/crypto/qce/skcipher.c
+++ b/drivers/crypto/qce/skcipher.c
@@ -124,15 +124,15 @@ qce_skcipher_async_req_handle(struct crypto_async_request *async_req)
 	rctx->dst_sg = rctx->dst_tbl.sgl;
 
 	dst_nents = dma_map_sg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst);
-	if (dst_nents < 0) {
-		ret = dst_nents;
+	if (!dst_nents) {
+		ret = -EIO;
 		goto error_free;
 	}
 
 	if (diff_dst) {
 		src_nents = dma_map_sg(qce->dev, req->src, rctx->src_nents, dir_src);
-		if (src_nents < 0) {
-			ret = src_nents;
+		if (!src_nents) {
+			ret = -EIO;
 			goto error_unmap_dst;
 		}
 		rctx->src_sg = req->src;
-- 
2.34.1