From: Thomas Meyer <thomas@m3y3r.de>
To: linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] RDMA/nes: Use kcalloc instead of kzalloc to allocate array
Date: Tue, 29 Nov 2011 22:08:00 +0100 [thread overview]
Message-ID: <1322600880.1534.305.camel@localhost.localdomain> (raw)
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 <thomas@m3y3r.de>
---
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,
reply other threads:[~2011-11-29 21:08 UTC|newest]
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