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From:   Vic Wu <vic.wu@mediatek.com>
To:     Herbert Xu <herbert@gondor.apana.org.au>
CC:     "David S . Miller" <davem@davemloft.net>,
        Ryder Lee <ryder.lee@mediatek.com>,
        <linux-crypto@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <linux-mediatek@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>, Vic Wu <vic.wu@mediatek.com>
Subject: [PATCH 3/5] crypto: mediatek: only treat EBUSY as transient if backlog
Date:   Wed, 28 Aug 2019 14:37:14 +0800
Message-ID: <20190828063716.22689-3-vic.wu@mediatek.com>
In-Reply-To: <20190828063716.22689-1-vic.wu@mediatek.com>
References: <20190828063716.22689-1-vic.wu@mediatek.com>
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Sender: linux-crypto-owner@vger.kernel.org
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From: Ryder Lee <ryder.lee@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.lee@mediatek.com>
Signed-off-by: Vic Wu <vic.wu@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