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From:   "Hook, Gary" <Gary.Hook@amd.com>
To:     "linux-crypto@vger.kernel.org" <linux-crypto@vger.kernel.org>
CC:     "Lendacky, Thomas" <Thomas.Lendacky@amd.com>,
        "herbert@gondor.apana.org.au" <herbert@gondor.apana.org.au>,
        "davem@davemloft.net" <davem@davemloft.net>
Subject: [PATCH 1/2] crypto: ccp - Change a message to reflect status instead
 of failure
Thread-Topic: [PATCH 1/2] crypto: ccp - Change a message to reflect status
 instead of failure
Thread-Index: AQHVhevY9UUckwKsBkigLMOBqOqS1Q==
Date:   Fri, 18 Oct 2019 19:40:06 +0000
Message-ID: <157142760519.6869.16051058025986432861.stgit@taos>
References: <157142758885.6869.11882127817423670946.stgit@taos>
In-Reply-To: <157142758885.6869.11882127817423670946.stgit@taos>
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If an AMD BIOS makes zero CCP queues available to the driver, the
device is unavailable and therefore can't be activated. When this
happens, report the status but don't report a (non-existent)
failure. The CCP will be unactivated.

Signed-off-by: Gary R Hook <gary.hook@amd.com>
---
 drivers/crypto/ccp/ccp-dev-v5.c |    2 +-
 drivers/crypto/ccp/ccp-dev.c    |   15 ++++++++++++---
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/crypto/ccp/ccp-dev-v5.c b/drivers/crypto/ccp/ccp-dev-v=
5.c
index 57eb53b8ac21..2937ba3afb7b 100644
--- a/drivers/crypto/ccp/ccp-dev-v5.c
+++ b/drivers/crypto/ccp/ccp-dev-v5.c
@@ -854,7 +854,7 @@ static int ccp5_init(struct ccp_device *ccp)
=20
 	if (ccp->cmd_q_count =3D=3D 0) {
 		dev_notice(dev, "no command queues available\n");
-		ret =3D -EIO;
+		ret =3D 1;
 		goto e_pool;
 	}
=20
diff --git a/drivers/crypto/ccp/ccp-dev.c b/drivers/crypto/ccp/ccp-dev.c
index 73acf0fdb793..19ac509ed76e 100644
--- a/drivers/crypto/ccp/ccp-dev.c
+++ b/drivers/crypto/ccp/ccp-dev.c
@@ -641,18 +641,27 @@ int ccp_dev_init(struct sp_device *sp)
 		ccp->vdata->setup(ccp);
=20
 	ret =3D ccp->vdata->perform->init(ccp);
-	if (ret)
+	if (ret) {
+		/* A positive number means that the device cannot be initialized,
+		 * but no additional message is required.
+		 */
+		if (ret > 0)
+			goto e_quiet;
+
+		/* An unexpected problem occurred, and should be reported in the log */
 		goto e_err;
+	}
=20
 	dev_notice(dev, "ccp enabled\n");
=20
 	return 0;
=20
 e_err:
-	sp->ccp_data =3D NULL;
-
 	dev_notice(dev, "ccp initialization failed\n");
=20
+e_quiet:
+	sp->ccp_data =3D NULL;
+
 	return ret;
 }
=20