From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Meyer Subject: [PATCH] RDMA/nes: Use kcalloc instead of kzalloc to allocate array Date: Tue, 29 Nov 2011 22:08:00 +0100 Message-ID: <1322600880.1534.305.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Return-path: Sender: linux-kernel-owner@vger.kernel.org To: linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org List-Id: linux-rdma@vger.kernel.org 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. The semantic patch that makes this change is available in https://lkml.org/lkml/2011/11/25/107 Signed-off-by: Thomas Meyer --- diff -u -p a/drivers/infiniband/hw/nes/nes_verbs.c b/drivers/infiniband/hw/nes/nes_verbs.c --- a/drivers/infiniband/hw/nes/nes_verbs.c 2011-11-13 11:07:26.680158626 +0100 +++ b/drivers/infiniband/hw/nes/nes_verbs.c 2011-11-28 19:51:27.201653445 +0100 @@ -2156,7 +2156,9 @@ static struct ib_mr *nes_reg_phys_mr(str kfree(nesmr); return ERR_PTR(-ENOMEM); } - root_vpbl.leaf_vpbl = kzalloc(sizeof(*root_vpbl.leaf_vpbl)*1024, GFP_KERNEL); + root_vpbl.leaf_vpbl = kcalloc(1024, + sizeof(*root_vpbl.leaf_vpbl), + GFP_KERNEL); if (!root_vpbl.leaf_vpbl) { pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase, root_vpbl.pbl_pbase); @@ -2429,8 +2431,9 @@ static struct ib_mr *nes_reg_user_mr(str ibmr = ERR_PTR(-ENOMEM); goto reg_user_mr_err; } - root_vpbl.leaf_vpbl = kzalloc(sizeof(*root_vpbl.leaf_vpbl)*1024, - GFP_KERNEL); + root_vpbl.leaf_vpbl = kcalloc(1024, + sizeof(*root_vpbl.leaf_vpbl), + GFP_KERNEL); if (!root_vpbl.leaf_vpbl) { ib_umem_release(region); pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,