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

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

[Qianfeng Rong]

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@vivo.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

Re: [PATCH v2] PCI: keystone: Use kcalloc() instead of kzalloc()

[Siddharth Vadapalli]

On Tue, Aug 19, 2025 at 09:12:33PM +0800, Qianfeng Rong wrote:
> 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@vivo.com>
> ---
> v2: Modified the commit message.

Reviewed-by: Siddharth Vadapalli <s-vadapalli@ti.com>

Regards,
Siddharth.

Re: [PATCH v2] PCI: keystone: Use kcalloc() instead of kzalloc()

[Manivannan Sadhasivam]

On Tue, 19 Aug 2025 21:12:33 +0800, Qianfeng Rong wrote:
> 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.
> 
> [...]

Applied, thanks!

[1/1] PCI: keystone: Use kcalloc() instead of kzalloc()
      commit: ffdd27d36265be108827c606c9fbe81a5947547e

Best regards,
-- 
Manivannan Sadhasivam <mani@kernel.org>