linux-kernel - Re: [PATCH] sound: oss: uart401: Used kmemdup instead of kmalloc and memcpy

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Date:	Tue, 02 Apr 2013 11:23:24 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Alexandru Gheorghiu <gheorghiuandru@...il.com>
Cc:	Jaroslav Kysela <perex@...ex.cz>, alsa-devel@...a-project.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sound: oss: uart401: Used kmemdup instead of kmalloc and memcpy

At Mon, 25 Mar 2013 15:46:49 +0200,
Alexandru Gheorghiu wrote:
> 
> Used kmemdup instead of replicating it's behaviour with kmalloc followed
> by memcpy.
> Patch found using coccinelle.
> 
> Signed-off-by: Alexandru Gheorghiu <gheorghiuandru@...il.com>

Thanks, applied.


Takashi

> ---
>  sound/oss/uart401.c |   11 +++++++----
>  1 file changed, 7 insertions(+), 4 deletions(-)
> 
> diff --git a/sound/oss/uart401.c b/sound/oss/uart401.c
> index 8e514a6..5433c6f 100644
> --- a/sound/oss/uart401.c
> +++ b/sound/oss/uart401.c
> @@ -352,23 +352,26 @@ int probe_uart401(struct address_info *hw_config, struct module *owner)
>  		goto cleanup_irq;
>  	}
>  	conf_printf(name, hw_config);
> -	midi_devs[devc->my_dev] = kmalloc(sizeof(struct midi_operations), GFP_KERNEL);
> +	midi_devs[devc->my_dev] = kmemdup(&uart401_operations,
> +					  sizeof(struct midi_operations),
> +					  GFP_KERNEL);
>  	if (!midi_devs[devc->my_dev]) {
>  		printk(KERN_ERR "uart401: Failed to allocate memory\n");
>  		goto cleanup_unload_mididev;
>  	}
> -	memcpy(midi_devs[devc->my_dev], &uart401_operations, sizeof(struct midi_operations));
>  
>  	if (owner)
>  		midi_devs[devc->my_dev]->owner = owner;
>  	
>  	midi_devs[devc->my_dev]->devc = devc;
> -	midi_devs[devc->my_dev]->converter = kmalloc(sizeof(struct synth_operations), GFP_KERNEL);
> +	midi_devs[devc->my_dev]->converter = kmemdup(&std_midi_synth,
> +						     sizeof(struct synth_operations),
> +						     GFP_KERNEL);
> +
>  	if (!midi_devs[devc->my_dev]->converter) {
>  		printk(KERN_WARNING "uart401: Failed to allocate memory\n");
>  		goto cleanup_midi_devs;
>  	}
> -	memcpy(midi_devs[devc->my_dev]->converter, &std_midi_synth, sizeof(struct synth_operations));
>  	strcpy(midi_devs[devc->my_dev]->info.name, name);
>  	midi_devs[devc->my_dev]->converter->id = "UART401";
>  	midi_devs[devc->my_dev]->converter->midi_dev = devc->my_dev;
> -- 
> 1.7.9.5
> 
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