[PATCH 3/5] crypto: mediatek: only treat EBUSY as transient if backlog

[Vic Wu]

From: Ryder Lee <ryder....@mediatek.com>

The driver was treating -EBUSY as indication of queueing to backlog
without checking that backlog is enabled for the request.

Fix it by checking request flags.

Signed-off-by: Ryder Lee <ryder....@mediatek.com>
Signed-off-by: Vic Wu <vic...@mediatek.com>
---
 drivers/crypto/mediatek/mtk-sha.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/mediatek/mtk-sha.c 
b/drivers/crypto/mediatek/mtk-sha.c
index 2226f12d..1ecef3b5 100644
--- a/drivers/crypto/mediatek/mtk-sha.c
+++ b/drivers/crypto/mediatek/mtk-sha.c
@@ -781,7 +781,9 @@ static int mtk_sha_finup(struct ahash_request *req)
        ctx->flags |= SHA_FLAGS_FINUP;
 
        err1 = mtk_sha_update(req);
-       if (err1 == -EINPROGRESS || err1 == -EBUSY)
+       if (err1 == -EINPROGRESS ||
+           (err1 == -EBUSY && (ahash_request_flags(req) &
+                               CRYPTO_TFM_REQ_MAY_BACKLOG)))
                return err1;
        /*
         * final() has to be always called to cleanup resources
-- 
2.17.1