linux-kernel - [PATCH] thunderbolt: Use kcalloc

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Date:	Sat, 12 Jul 2014 01:12:43 +0530
From:	Himangi Saraogi <himangi774@...il.com>
To:	linux-kernel@...r.kernel.org,
	Andreas Noever <andreas.noever@...il.com>
Cc:	julia.lawall@...6.fr
Subject: [PATCH] thunderbolt: Use kcalloc

The advantage of kcalloc is, that will prevent integer overflows
which could result from the multiplication of number of elements
and size and it is also a bit nicer to read.

Signed-off-by: Himangi Saraogi <himangi774@...il.com>
Acked-by: Julia Lawall <julia.lawall@...6.fr>
---
A patch on top of my char-misc tree as the kzalloc version is
already applied there.

 drivers/thunderbolt/nhi.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/thunderbolt/nhi.c b/drivers/thunderbolt/nhi.c
index ce72f31..c68fe12 100644
--- a/drivers/thunderbolt/nhi.c
+++ b/drivers/thunderbolt/nhi.c
@@ -569,12 +569,10 @@ static int nhi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 			 nhi->hop_count);
 	INIT_WORK(&nhi->interrupt_work, nhi_interrupt_work);
 
-	nhi->tx_rings = devm_kzalloc(&pdev->dev,
-				     nhi->hop_count * sizeof(*nhi->tx_rings),
-				     GFP_KERNEL);
-	nhi->rx_rings = devm_kzalloc(&pdev->dev,
-				     nhi->hop_count * sizeof(*nhi->rx_rings),
-				     GFP_KERNEL);
+	nhi->tx_rings = devm_kcalloc(&pdev->dev, nhi->hop_count,
+				     sizeof(*nhi->tx_rings), GFP_KERNEL);
+	nhi->rx_rings = devm_kcalloc(&pdev->dev, nhi->hop_count,
+				     sizeof(*nhi->rx_rings), GFP_KERNEL);
 	if (!nhi->tx_rings || !nhi->rx_rings)
 		return -ENOMEM;
 
-- 
1.9.1

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