Re: [PATCH v2 2/2] extcon: max8997: add missing const

From: Chanwoo Choi
Date: Tue Mar 19 2013 - 05:45:26 EST


On 03/19/2013 02:31 PM, Jingoo Han wrote:
> Fixed the checkpatch warning as below:
>
> WARNING: static const char * array should probably be static const char * const
> #163: FILE: drivers/extcon/extcon-max8997.c:163:
> +static const char *max8997_extcon_cable[] = {
>
> Also, const is added to variable 'supported_cable' to prevent
> build warning as below:
>
> drivers/extcon/extcon-max8997.c: In function 'max8997_muic_probe':
> drivers/extcon/extcon-max8997.c:708:30: warning: assignment discards 'const' qualifier from pointer target type [enabled by
> default]
>
> Signed-off-by: Jingoo Han <jg1.han@xxxxxxxxxxx>
> ---
> Changes since v1:
> - Added const to variable 'supported_cable'
>
> drivers/extcon/extcon-max8997.c | 2 +-
> include/linux/extcon.h | 2 +-
> 2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/extcon/extcon-max8997.c b/drivers/extcon/extcon-max8997.c
> index 20772ad..b82a591 100644
> --- a/drivers/extcon/extcon-max8997.c
> +++ b/drivers/extcon/extcon-max8997.c
> @@ -160,7 +160,7 @@ enum {
> _EXTCON_CABLE_NUM,
> };
>
> -static const char *max8997_extcon_cable[] = {
> +static const char * const max8997_extcon_cable[] = {
OK.
> [EXTCON_CABLE_USB] = "USB",
> [EXTCON_CABLE_USB_HOST] = "USB-Host",
> [EXTCON_CABLE_TA] = "TA",
> diff --git a/include/linux/extcon.h b/include/linux/extcon.h
> index fcb51c8..741a491 100644
> --- a/include/linux/extcon.h
> +++ b/include/linux/extcon.h
> @@ -113,7 +113,7 @@ struct extcon_cable;
> struct extcon_dev {
> /* --- Optional user initializing data --- */
> const char *name;
> - const char **supported_cable;
> + const char * const *supported_cable;
I understand your intention to fix build warning.
But, I don't agree this coding style. I think this coding
style is not general method.

Thanks,
Chanwoo Choi




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