linux-kernel - [PATCH 7/7] crypto: caam: no need to check return value of debugfs

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Message-Id: <20190122151422.14204-8-gregkh@linuxfoundation.org>
Date:   Tue, 22 Jan 2019 16:14:22 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Herbert Xu <herbert@...dor.apana.org.au>,
        David Miller <davem@...emloft.net>
Cc:     linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Horia Geantă <horia.geanta@....com>,
        Aymen Sghaier <aymen.sghaier@....com>
Subject: [PATCH 7/7] crypto: caam: no need to check return value of debugfs_create functions

When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: "Horia Geantă" <horia.geanta@....com>
Cc: Aymen Sghaier <aymen.sghaier@....com>
Cc: Herbert Xu <herbert@...dor.apana.org.au>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: linux-crypto@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/crypto/caam/ctrl.c   | 21 ++++++---------------
 drivers/crypto/caam/intern.h |  1 -
 2 files changed, 6 insertions(+), 16 deletions(-)

diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c
index 16bbc72f041a..87c13fb6028c 100644
--- a/drivers/crypto/caam/ctrl.c
+++ b/drivers/crypto/caam/ctrl.c
@@ -863,27 +863,18 @@ static int caam_probe(struct platform_device *pdev)
 	/* Internal covering keys (useful in non-secure mode only) */
 	ctrlpriv->ctl_kek_wrap.data = (__force void *)&ctrlpriv->ctrl->kek[0];
 	ctrlpriv->ctl_kek_wrap.size = KEK_KEY_SIZE * sizeof(u32);
-	ctrlpriv->ctl_kek = debugfs_create_blob("kek",
-						S_IRUSR |
-						S_IRGRP | S_IROTH,
-						ctrlpriv->ctl,
-						&ctrlpriv->ctl_kek_wrap);
+	debugfs_create_blob("kek", S_IRUSR | S_IRGRP | S_IROTH, ctrlpriv->ctl,
+			    &ctrlpriv->ctl_kek_wrap);
 
 	ctrlpriv->ctl_tkek_wrap.data = (__force void *)&ctrlpriv->ctrl->tkek[0];
 	ctrlpriv->ctl_tkek_wrap.size = KEK_KEY_SIZE * sizeof(u32);
-	ctrlpriv->ctl_tkek = debugfs_create_blob("tkek",
-						 S_IRUSR |
-						 S_IRGRP | S_IROTH,
-						 ctrlpriv->ctl,
-						 &ctrlpriv->ctl_tkek_wrap);
+	debugfs_create_blob("tkek", S_IRUSR | S_IRGRP | S_IROTH, ctrlpriv->ctl,
+			    &ctrlpriv->ctl_tkek_wrap);
 
 	ctrlpriv->ctl_tdsk_wrap.data = (__force void *)&ctrlpriv->ctrl->tdsk[0];
 	ctrlpriv->ctl_tdsk_wrap.size = KEK_KEY_SIZE * sizeof(u32);
-	ctrlpriv->ctl_tdsk = debugfs_create_blob("tdsk",
-						 S_IRUSR |
-						 S_IRGRP | S_IROTH,
-						 ctrlpriv->ctl,
-						 &ctrlpriv->ctl_tdsk_wrap);
+	debugfs_create_blob("tdsk", S_IRUSR | S_IRGRP | S_IROTH, ctrlpriv->ctl,
+			    &ctrlpriv->ctl_tdsk_wrap);
 #endif
 	return 0;
 
diff --git a/drivers/crypto/caam/intern.h b/drivers/crypto/caam/intern.h
index babc78abd155..5869ad58d497 100644
--- a/drivers/crypto/caam/intern.h
+++ b/drivers/crypto/caam/intern.h
@@ -106,7 +106,6 @@ struct caam_drv_private {
 	struct dentry *dfs_root;
 	struct dentry *ctl; /* controller dir */
 	struct debugfs_blob_wrapper ctl_kek_wrap, ctl_tkek_wrap, ctl_tdsk_wrap;
-	struct dentry *ctl_kek, *ctl_tkek, *ctl_tdsk;
 #endif
 };
 
-- 
2.20.1