linux-kernel - [PATCH 05/25] net: mvpp2: Use kmalloc_array() in mvpp2_txq

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Date:   Mon, 17 Apr 2017 17:15:26 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
        Florian Fainelli <f.fainelli@...il.com>,
        Jarod Wilson <jarod@...hat.com>,
        Jisheng Zhang <jszhang@...vell.com>,
        Mirko Lindner <mlindner@...vell.com>,
        Philippe Reynes <tremyfr@...il.com>,
        Russell King <rmk+kernel@...linux.org.uk>,
        Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
        Stephen Hemminger <stephen@...workplumber.org>,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 05/25] net: mvpp2: Use kmalloc_array() in mvpp2_txq_init()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Mon, 17 Apr 2017 08:09:07 +0200

* A multiplication for the size determination of a memory allocation
  indicated that an array data structure should be processed.
  Thus use the corresponding function "kmalloc_array".

  This issue was detected by using the Coccinelle software.

* Replace the specification of a data structure by a pointer dereference
  to make the corresponding size determination a bit safer according to
  the Linux coding style convention.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/net/ethernet/marvell/mvpp2.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/marvell/mvpp2.c b/drivers/net/ethernet/marvell/mvpp2.c
index af5bfa13d976..a86d9111c476 100644
--- a/drivers/net/ethernet/marvell/mvpp2.c
+++ b/drivers/net/ethernet/marvell/mvpp2.c
@@ -5083,9 +5083,9 @@ static int mvpp2_txq_init(struct mvpp2_port *port,
 	for_each_present_cpu(cpu) {
 		txq_pcpu = per_cpu_ptr(txq->pcpu, cpu);
 		txq_pcpu->size = txq->size;
-		txq_pcpu->buffs = kmalloc(txq_pcpu->size *
-					  sizeof(struct mvpp2_txq_pcpu_buf),
-					  GFP_KERNEL);
+		txq_pcpu->buffs = kmalloc_array(txq_pcpu->size,
+						sizeof(*txq_pcpu->buffs),
+						GFP_KERNEL);
 		if (!txq_pcpu->buffs)
 			goto error;
 
-- 
2.12.2