linux-kernel - Re: [PATCH V2 1/2] pinctrl: pinctrl-imx: free allocated pinctrl_map structure only once and use kernel facilities for IMX_PMX

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Message-ID: <20120608025916.GF8354@shlinux2.ap.freescale.net>
Date:	Fri, 8 Jun 2012 10:59:17 +0800
From:	Dong Aisheng <aisheng.dong@...escale.com>
To:	Devendra Naga <devendra.aaru@...il.com>
CC:	Linus Walleij <linus.walleij@...aro.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V2 1/2] pinctrl: pinctrl-imx: free allocated
 pinctrl_map structure only once and use kernel facilities for IMX_PMX_DUMP

On Thu, Jun 07, 2012 at 10:18:35PM +0530, Devendra Naga wrote:
> a) as we allocate the pinctrl_map structure at imx_dt_node_to_map at  line 167, anyway
> if its an element, or a num_elements * (sizeof(type)) elements allocated to one single
> pointer must be freed only once.
> 
> CASE. A)
> 
> as new_map is not moved and allocated like,
> 
> for (i = 0; i < MAX_ELEMS; i++) {
> 	new_map[i] = kmalloc(numelems * size, GFP_KERNEL);
> }
> 
> its freed as
> 
> for (i = 0; i < MAX_ELEMS; i++) {
> 	kfree(new_map[i]);
> }
> 
> CASE. B)
> and its allocated like
> 	new_map = kmalloc(numelems * size, GFP_KERNEL);
> 
> it just needs kfree not as case A's.
> 
> b) use KERN_DEBUG facility for the IMX_PMX_DUMP macro.
> 
> Signed-off-by: Devendra Naga <devendra.aaru@...il.com>
> Acked-by: Dong Aisheng <dong.aisheng@...aro.org>
> ---
>  drivers/pinctrl/pinctrl-imx.c |   25 +++++++++++--------------
>  1 file changed, 11 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/pinctrl/pinctrl-imx.c b/drivers/pinctrl/pinctrl-imx.c
> index f6e7c67..7a59a59 100644
> --- a/drivers/pinctrl/pinctrl-imx.c
> +++ b/drivers/pinctrl/pinctrl-imx.c
> @@ -27,16 +27,16 @@
>  #include "core.h"
>  #include "pinctrl-imx.h"
>  
> -#define IMX_PMX_DUMP(info, p, m, c, n)		\
> -{						\
> -	int i, j;				\
> -	printk("Format: Pin Mux Config\n");	\
> -	for (i = 0; i < n; i++) {		\
> -		j = p[i];			\
> -		printk("%s %d 0x%lx\n",		\
> -			info->pins[j].name,	\
> -			m[i], c[i]);		\
> -	}					\
> +#define IMX_PMX_DUMP(info, p, m, c, n)			\
> +{							\
> +	int i, j;					\
> +	printk(KERN_DEBUG "Format: Pin Mux Config\n");	\
> +	for (i = 0; i < n; i++) {			\
> +		j = p[i];				\
> +		printk(KERN_DEBUG "%s %d 0x%lx\n",	\
> +			info->pins[j].name,		\
> +			m[i], c[i]);			\
> +	}						\
>  }
>  
Sorry i missed one more comment.
I think you may also need add below changes since the #ifdef DEBUG
is not needed anymore after using KERN_DEBUG.

diff --git a/drivers/pinctrl/pinctrl-imx.c b/drivers/pinctrl/pinctrl-imx.c
index d8fe1d8..4d073ef 100644
--- a/drivers/pinctrl/pinctrl-imx.c
+++ b/drivers/pinctrl/pinctrl-imx.c
@@ -475,9 +475,8 @@ static int __devinit imx_pinctrl_parse_groups(struct device_node *np,
                grp->configs[j] = config & ~IMX_PAD_SION;
        }

-#ifdef DEBUG
        IMX_PMX_DUMP(info, grp->pins, grp->mux_mode, grp->configs, grp->npins);
-#endif
+
        return 0;
 }

Regards
Dong Aisheng

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