linux-kernel - Re: [PATCH] HID: roccat: Use kmemdup rather than duplicating its implementation

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Message-ID: <alpine.LNX.2.00.1111200043140.15187@pobox.suse.cz>
Date:	Sun, 20 Nov 2011 00:43:24 +0100 (CET)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Thomas Meyer <thomas@...3r.de>
Cc:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] HID: roccat: Use kmemdup rather than duplicating its
 implementation

On Thu, 17 Nov 2011, Thomas Meyer wrote:

> The semantic patch that makes this change is available
> in scripts/coccinelle/api/memdup.cocci.
> 
> Signed-off-by: Thomas Meyer <thomas@...3r.de>
> ---
> 
> diff -u -p a/drivers/hid/hid-roccat-common.c b/drivers/hid/hid-roccat-common.c
> --- a/drivers/hid/hid-roccat-common.c 2011-11-07 19:39:05.364461084 +0100
> +++ b/drivers/hid/hid-roccat-common.c 2011-11-08 10:45:42.781966362 +0100
> @@ -49,12 +49,10 @@ int roccat_common_send(struct usb_device
>  	char *buf;
>  	int len;
>  
> -	buf = kmalloc(size, GFP_KERNEL);
> +	buf = kmemdup(data, size, GFP_KERNEL);
>  	if (buf == NULL)
>  		return -ENOMEM;
>  
> -	memcpy(buf, data, size);
> -
>  	len = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
>  			HID_REQ_SET_REPORT,
>  			USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
> diff -u -p a/drivers/hid/hid-roccat-kone.c b/drivers/hid/hid-roccat-kone.c
> --- a/drivers/hid/hid-roccat-kone.c 2011-11-07 19:37:44.826571091 +0100
> +++ b/drivers/hid/hid-roccat-kone.c 2011-11-08 10:45:45.085330572 +0100
> @@ -78,12 +78,10 @@ static int kone_send(struct usb_device *
>  	char *buf;
>  	int len;
>  
> -	buf = kmalloc(size, GFP_KERNEL);
> +	buf = kmemdup(data, size, GFP_KERNEL);
>  	if (buf == NULL)
>  		return -ENOMEM;
>  
> -	memcpy(buf, data, size);
> -
>  	len = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
>  			HID_REQ_SET_REPORT,
>  			USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,

Applied, thank you.

-- 
Jiri Kosina
SUSE Labs
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