linux-kernel - Re: [PATCH] drivers: net: davinci_cpdma: drop devm_kfree of devm

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Date:	Sun, 10 Aug 2014 22:26:47 +0200
From:	Daniel Mack <zonque@...il.com>
To:	Himangi Saraogi <himangi774@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Olof Johansson <olof@...om.net>,
	Dan Carpenter <dan.carpenter@...cle.com>,
	Felipe Balbi <balbi@...com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
CC:	Julia Lawall <julia.lawall@...6.fr>
Subject: Re: [PATCH] drivers: net: davinci_cpdma: drop devm_kfree of devm_kzalloc'd
 data

On 08/10/2014 09:58 PM, Himangi Saraogi wrote:
> devm_kfree should not have to be explicitly used.
> 
> The Coccinelle semantic patch that fixes this problem is as follows:
> 
> // <smpl>
> @@
> expression x,d;
> @@
> 
> x = devm_kzalloc(...)
> ...
> ?-devm_kfree(d,x);
> // </smpl>
> 
> Signed-off-by: Himangi Saraogi <himangi774@...il.com>
> Acked-by: Julia Lawall <julia.lawall@...6.fr>

Acked-by: Daniel Mack <zonque@...il.com>

However, you need to resend this patch after 3.17-rc1 has been released
and the net-next branch was opened again.


Thanks,
Daniel


> ---
>  drivers/net/ethernet/ti/davinci_cpdma.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/ti/davinci_cpdma.c b/drivers/net/ethernet/ti/davinci_cpdma.c
> index 4a000f6..af673f5 100644
> --- a/drivers/net/ethernet/ti/davinci_cpdma.c
> +++ b/drivers/net/ethernet/ti/davinci_cpdma.c
> @@ -512,7 +512,6 @@ struct cpdma_chan *cpdma_chan_create(struct cpdma_ctlr *ctlr, int chan_num,
>  	spin_lock_irqsave(&ctlr->lock, flags);
>  	if (ctlr->channels[chan_num]) {
>  		spin_unlock_irqrestore(&ctlr->lock, flags);
> -		devm_kfree(ctlr->dev, chan);
>  		return ERR_PTR(-EBUSY);
>  	}
>  
> 

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