[PATCH 13/37] drivers/net/wireless/iwmc3200wifi: Use kmemdup

[PATCH 13/37] drivers/net/wireless/iwmc3200wifi: Use kmemdup

[Julia Lawall]

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>

---
 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;

Re: [PATCH 13/37] drivers/net/wireless/iwmc3200wifi: Use kmemdup

[Samuel Ortiz]

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;

-- 
Intel Open Source Technology Centre
http://oss.intel.com/
---------------------------------------------------------------------
Intel Corporation SAS (French simplified joint stock company)
Registered headquarters: "Les Montalets"- 2, rue de Paris, 
92196 Meudon Cedex, France
Registration Number:  302 456 199 R.C.S. NANTERRE
Capital: 4,572,000 Euros

This e-mail and any attachments may contain confidential material for
the sole use of the intended recipient(s). Any review or distribution
by others is strictly prohibited. If you are not the intended
recipient, please contact the sender and delete all copies.