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From:   Thara Gopinath <thara.gopinath@linaro.org>
To:     herbert@gondor.apana.org.au, davem@davemloft.net,
        bjorn.andersson@linaro.org
Cc:     ebiggers@google.com, ardb@kernel.org, sivaprak@codeaurora.org,
        linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-msm@vger.kernel.org
Subject: [Patch v4 1/7] crypto: qce: common: Add MAC failed error checking
Date:   Thu, 29 Apr 2021 11:07:01 -0400
Message-Id: <20210429150707.3168383-2-thara.gopinath@linaro.org>
In-Reply-To: <20210429150707.3168383-1-thara.gopinath@linaro.org>
References: <20210429150707.3168383-1-thara.gopinath@linaro.org>
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MAC_FAILED gets set in the status register if authenthication fails
for ccm algorithms(during decryption). Add support to catch and flag
this error.

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Thara Gopinath <thara.gopinath@linaro.org>
---

v1->v2:
	- Split the error checking for -ENXIO and -EBADMSG into if-else clause
	  so that the code is more readable as per Bjorn's review comment.

 drivers/crypto/qce/common.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/crypto/qce/common.c b/drivers/crypto/qce/common.c
index dceb9579d87a..dd76175d5c62 100644
--- a/drivers/crypto/qce/common.c
+++ b/drivers/crypto/qce/common.c
@@ -419,6 +419,8 @@ int qce_check_status(struct qce_device *qce, u32 *status)
 	 */
 	if (*status & STATUS_ERRORS || !(*status & BIT(OPERATION_DONE_SHIFT)))
 		ret = -ENXIO;
+	else if (*status & BIT(MAC_FAILED_SHIFT))
+		ret = -EBADMSG;
 
 	return ret;
 }
-- 
2.25.1