Am 24.08.2016 22:36, schrieb SF Markus Elfring: > From: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx> > Date: Wed, 24 Aug 2016 22:26:37 +0200 > > A multiplication for the size determination of a memory allocation > indicated that an array data structure should be processed. > Thus reuse the corresponding function "kmalloc_array". > > This issue was detected by using the Coccinelle software. > > Signed-off-by: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx> > --- > arch/powerpc/platforms/powernv/pci-ioda.c | 9 ++++++--- > 1 file changed, 6 insertions(+), 3 deletions(-) > > diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c > index fd9444f..2366552 100644 > --- a/arch/powerpc/platforms/powernv/pci-ioda.c > +++ b/arch/powerpc/platforms/powernv/pci-ioda.c > @@ -1305,7 +1305,9 @@ static int pnv_pci_vf_assign_m64(struct pci_dev *pdev, u16 num_vfs) > else > m64_bars = 1; > > - pdn->m64_map = kmalloc(sizeof(*pdn->m64_map) * m64_bars, GFP_KERNEL); > + pdn->m64_map = kmalloc_array(m64_bars, > + sizeof(*pdn->m64_map), > + GFP_KERNEL); > if (!pdn->m64_map) > return -ENOMEM; > /* Initialize the m64_map to IODA_INVALID_M64 */ > @@ -1572,8 +1574,9 @@ int pnv_pci_sriov_enable(struct pci_dev *pdev, u16 num_vfs) > > /* Allocating pe_num_map */ > if (pdn->m64_single_mode) > - pdn->pe_num_map = kmalloc(sizeof(*pdn->pe_num_map) * num_vfs, > - GFP_KERNEL); > + pdn->pe_num_map = kmalloc_array(num_vfs, > + sizeof(*pdn->pe_num_map), > + GFP_KERNEL); > else > pdn->pe_num_map = kmalloc(sizeof(*pdn->pe_num_map), GFP_KERNEL); > what is the value of num_vfs in the !pdn->m64_single_mode case ? otherwise someone could make it like: if (!pdn->m64_single_mode) num_vfs=1; pdn->pe_num_map = kmalloc_array(num_vfs, .... so it looks a bit oversophisticated. re, wh -- To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
