From: Ryder Lee <ryder.lee@mediatek.com>
Date: Wed, 28 Aug 2019 06:37:14 +0000 (+0800)
Subject: crypto: mediatek - only treat EBUSY as transient if backlog
X-Git-Tag: v5.4-rc1~69^2~73
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f271ea9fe1de6455a6855ef320c6946a7f7bf6e7;p=platform%2Fkernel%2Flinux-rpi.git

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 f03b0f06fb2f..9e9f48bb7f85 100644
--- 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