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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Iuliana Prodan <iuliana.prodan@nxp.com>,
        Horia Geanta <horia.geanta@nxp.com>,
        Herbert Xu <herbert@gondor.apana.org.au>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.9 178/271] crypto: caam - free resources in case caam_rng registration failed
Date:   Tue, 28 Jan 2020 15:05:27 +0100
Message-Id: <20200128135905.793901133@linuxfoundation.org>
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From: Iuliana Prodan <iuliana.prodan@nxp.com>

[ Upstream commit c59a1d41672a89b5cac49db1a472ff889e35a2d2 ]

Check the return value of the hardware registration for caam_rng and free
resources in case of failure.

Fixes: e24f7c9e87d4 ("crypto: caam - hwrng support")
Signed-off-by: Iuliana Prodan <iuliana.prodan@nxp.com>
Reviewed-by: Horia Geanta <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/crypto/caam/caamrng.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/caam/caamrng.c b/drivers/crypto/caam/caamrng.c
index 9b92af2c72412..a77319bf221d8 100644
--- a/drivers/crypto/caam/caamrng.c
+++ b/drivers/crypto/caam/caamrng.c
@@ -361,7 +361,10 @@ static int __init caam_rng_init(void)
 		goto free_rng_ctx;
 
 	dev_info(dev, "registering rng-caam\n");
-	return hwrng_register(&caam_rng);
+
+	err = hwrng_register(&caam_rng);
+	if (!err)
+		return err;
 
 free_rng_ctx:
 	kfree(rng_ctx);
-- 
2.20.1