linux-kernel - [PATCH v2] PCI: keystone: Use kcalloc() instead of kzalloc()

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Message-Id: <20250819131235.152967-1-rongqianfeng@vivo.com>
Date: Tue, 19 Aug 2025 21:12:33 +0800
From: Qianfeng Rong <rongqianfeng@...o.com>
To: Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kwilczynski@...nel.org>,
	Manivannan Sadhasivam <mani@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Niklas Cassel <cassel@...nel.org>,
	Siddharth Vadapalli <s-vadapalli@...com>,
	Kishon Vijay Abraham I <kishon@...nel.org>,
	Hans Zhang <18255117159@....com>,
	Sergio Paracuellos <sergio.paracuellos@...il.com>,
	"Jiri Slaby (SUSE)" <jirislaby@...nel.org>,
	linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Qianfeng Rong <rongqianfeng@...o.com>
Subject: [PATCH v2] PCI: keystone: Use kcalloc() instead of kzalloc()

Replace calls of devm_kzalloc() with devm_kcalloc() in ks_pcie_probe().
As noted in the kernel documentation [1], open-coded multiplication in
allocator arguments is discouraged because it can lead to integer
overflow.

Using devm_kcalloc() provides built-in overflow protection, making the
memory allocation safer when calculating the allocation size compared
to explicit multiplication.

[1]: https://www.kernel.org/doc/html/next/process/deprecated.html#open-coded-arithmetic-in-allocator-arguments

Signed-off-by: Qianfeng Rong <rongqianfeng@...o.com>
---
v2: Modified the commit message.
---
 drivers/pci/controller/dwc/pci-keystone.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
index 7d7aede54ed3..3d10e1112131 100644
--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -1212,11 +1212,11 @@ static int ks_pcie_probe(struct platform_device *pdev)
 	if (ret)
 		num_lanes = 1;
 
-	phy = devm_kzalloc(dev, sizeof(*phy) * num_lanes, GFP_KERNEL);
+	phy = devm_kcalloc(dev, num_lanes, sizeof(*phy), GFP_KERNEL);
 	if (!phy)
 		return -ENOMEM;
 
-	link = devm_kzalloc(dev, sizeof(*link) * num_lanes, GFP_KERNEL);
+	link = devm_kcalloc(dev, num_lanes, sizeof(*link), GFP_KERNEL);
 	if (!link)
 		return -ENOMEM;
 
-- 
2.34.1