[PATCH 2/5] powerpc-MSI: Use kmalloc_array() in ppc4xx_setup_msi_irqs()

SF Markus Elfring
2016-08-29T11:09:08Z

Date: Mon, 29 Aug 2016 11:11:24 +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 type 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@users.sourceforge.net>
---
arch/powerpc/sysdev/ppc4xx_msi.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/sysdev/ppc4xx_msi.c b/arch/powerpc/sysdev/ppc4xx_msi.c
index 8fb8061..0bd5e4b 100644
--- a/arch/powerpc/sysdev/ppc4xx_msi.c
+++ b/arch/powerpc/sysdev/ppc4xx_msi.c
@@ -89,7 +89,9 @@ static int ppc4xx_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
if (type = PCI_CAP_ID_MSIX)
pr_debug("ppc4xx msi: MSI-X untested, trying anyway.\n");

- msi_data->msi_virqs = kmalloc((msi_irqs) * sizeof(int), GFP_KERNEL);
+ msi_data->msi_virqs = kmalloc_array(msi_irqs,
+ sizeof(*msi_data->msi_virqs),
+ GFP_KERNEL);
if (!msi_data->msi_virqs)
return -ENOMEM;

--
2.9.3