linux-kernel - [PATCH 2/2] mtdconcat: Improve a size determination in concat

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Date:   Thu, 4 Jan 2018 20:30:49 +0100
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     linux-mtd@...ts.infradead.org,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Brian Norris <computersforpeace@...il.com>,
        Cyrille Pitchen <cyrille.pitchen@...ev4u.fr>,
        David Woodhouse <dwmw2@...radead.org>,
        Marek Vasut <marek.vasut@...il.com>,
        Richard Weinberger <richard@....at>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 2/2] mtdconcat: Improve a size determination in concat_erase()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Thu, 4 Jan 2018 20:00:27 +0100

Replace the specification of a data structure by a pointer dereference
as the parameter for the operator "sizeof" to make the corresponding size
determination a bit safer according to the Linux coding style convention.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/mtd/mtdconcat.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/mtd/mtdconcat.c b/drivers/mtd/mtdconcat.c
index f1a60c55a126..67d39e562c0f 100644
--- a/drivers/mtd/mtdconcat.c
+++ b/drivers/mtd/mtdconcat.c
@@ -428,8 +428,7 @@ static int concat_erase(struct mtd_info *mtd, struct erase_info *instr)
 	}
 
 	/* make a local copy of instr to avoid modifying the caller's struct */
-	erase = kmalloc(sizeof (struct erase_info), GFP_KERNEL);
-
+	erase = kmalloc(sizeof(*erase), GFP_KERNEL);
 	if (!erase)
 		return -ENOMEM;
 
-- 
2.15.1