crypto: mediatek - only treat EBUSY as transient if backlog

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.lee@mediatek.com>
Signed-off-by: Vic Wu <vic.wu@mediatek.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/mediatek/mtk-sha.c b/drivers/crypto/mediatek/mtk-sha.c
index f03b0f06fb2fb4efb25eeea8e58c679cfbd788c2..9e9f48bb7f850b9c560ae58f55f3ca418db9e80c 100644 (file)
--- a/drivers/crypto/mediatek/mtk-sha.c
+++ b/drivers/crypto/mediatek/mtk-sha.c
@@ -778,7 +778,9 @@ 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