linux-kernel - [char-misc-next 5/6] mei: hw: use sizeof of variable instead of struct type

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Date:   Thu, 23 Jul 2020 17:59:26 +0300
From:   Tomas Winkler <tomas.winkler@...el.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Alexander Usyskin <alexander.usyskin@...el.com>,
        linux-kernel@...r.kernel.org,
        Tomas Winkler <tomas.winkler@...el.com>,
        "Gustavo A . R . Silva" <gustavoars@...nel.org>,
        Arnd Bergmann <arnd@...db.de>
Subject: [char-misc-next 5/6] mei: hw: use sizeof of variable instead of struct type

Use sizeof(*dev) + sizeof(*hw) instead of
sizeof(struct mei_device) + sizeof(struct mei_me_hw)

There is a possibility of bug when variable type has changed but
corresponding struct passed to the sizeof has not.

Cc: Gustavo A. R. Silva <gustavoars@...nel.org>
Signed-off-by: Tomas Winkler <tomas.winkler@...el.com>
---
 drivers/misc/mei/hw-me.c  | 5 ++---
 drivers/misc/mei/hw-txe.c | 5 ++---
 2 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index c51d3da8f333..7692b69abcb5 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Copyright (c) 2003-2019, Intel Corporation. All rights reserved.
+ * Copyright (c) 2003-2020, Intel Corporation. All rights reserved.
  * Intel Management Engine Interface (Intel MEI) Linux driver
  */
 
@@ -1600,8 +1600,7 @@ struct mei_device *mei_me_dev_init(struct device *parent,
 	struct mei_me_hw *hw;
 	int i;
 
-	dev = devm_kzalloc(parent, sizeof(struct mei_device) +
-			   sizeof(struct mei_me_hw), GFP_KERNEL);
+	dev = devm_kzalloc(parent, sizeof(*dev) + sizeof(*hw), GFP_KERNEL);
 	if (!dev)
 		return NULL;
 
diff --git a/drivers/misc/mei/hw-txe.c b/drivers/misc/mei/hw-txe.c
index 785b260b3ae9..a4e854b9b9e6 100644
--- a/drivers/misc/mei/hw-txe.c
+++ b/drivers/misc/mei/hw-txe.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Copyright (c) 2013-2019, Intel Corporation. All rights reserved.
+ * Copyright (c) 2013-2020, Intel Corporation. All rights reserved.
  * Intel Management Engine Interface (Intel MEI) Linux driver
  */
 
@@ -1201,8 +1201,7 @@ struct mei_device *mei_txe_dev_init(struct pci_dev *pdev)
 	struct mei_device *dev;
 	struct mei_txe_hw *hw;
 
-	dev = devm_kzalloc(&pdev->dev, sizeof(struct mei_device) +
-			   sizeof(struct mei_txe_hw), GFP_KERNEL);
+	dev = devm_kzalloc(&pdev->dev, sizeof(*dev) + sizeof(*hw), GFP_KERNEL);
 	if (!dev)
 		return NULL;
 
-- 
2.25.4