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SubjectRe: [PATCH 13/37] drivers/net/wireless/iwmc3200wifi: Use kmemdup
On Sat, May 15, 2010 at 10:16:58PM +0100, Julia Lawall wrote:
> From: Julia Lawall <julia@diku.dk>
>
> Use kmemdup when some other buffer is immediately copied into the
> allocated region.
>
> A simplified version of the semantic patch that makes this change is as
> follows: (http://coccinelle.lip6.fr/)
>
> // <smpl>
> @@
> expression from,to,size,flag;
> statement S;
> @@
>
> - to = \(kmalloc\|kzalloc\)(size,flag);
> + to = kmemdup(from,size,flag);
> if (to==NULL || ...) S
> - memcpy(to, from, size);
> // </smpl>
>
> Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>

Cheers,
Samuel.

> ---
> drivers/net/wireless/iwmc3200wifi/rx.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff -u -p a/drivers/net/wireless/iwmc3200wifi/rx.c b/drivers/net/wireless/iwmc3200wifi/rx.c
> --- a/drivers/net/wireless/iwmc3200wifi/rx.c
> +++ b/drivers/net/wireless/iwmc3200wifi/rx.c
> @@ -321,14 +321,14 @@ iwm_rx_ticket_node_alloc(struct iwm_priv
> return ERR_PTR(-ENOMEM);
> }
>
> - ticket_node->ticket = kzalloc(sizeof(struct iwm_rx_ticket), GFP_KERNEL);
> + ticket_node->ticket = kmemdup(ticket, sizeof(struct iwm_rx_ticket),
> + GFP_KERNEL);
> if (!ticket_node->ticket) {
> IWM_ERR(iwm, "Couldn't allocate RX ticket\n");
> kfree(ticket_node);
> return ERR_PTR(-ENOMEM);
> }
>
> - memcpy(ticket_node->ticket, ticket, sizeof(struct iwm_rx_ticket));
> INIT_LIST_HEAD(&ticket_node->node);
>
> return ticket_node;

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