Re: [PATCH] staging: greybus: power_supply: Use struct_size() helper

[Rui Miguel Silva <rmfrfs@gmail.com>]

Hi Gustavo,
Thanks a lot for the patch.

On Wed 03 Apr 2019 at 21:58, Gustavo A. R. Silva wrote:
> Make use of the struct_size() helper instead of an open-coded 
> version
> in order to avoid any potential type mistakes, in particular in 
> the
> context in which this code is being used.
>
> So, replace code of the following form:
>
> sizeof(*resp) + props_count * sizeof(struct 
> gb_power_supply_props_desc)
>
> with:
>
> struct_size(resp, props, props_count)
>
> This code was detected with the help of Coccinelle.
>
> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>

What are the odds of 2 people changing same code in greybus in
the same day :).

But it happened, so as Johan asked please rebase on top of his
patch. that would be great.

---
Cheers,
	Rui

> ---
>  drivers/staging/greybus/power_supply.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/staging/greybus/power_supply.c 
> b/drivers/staging/greybus/power_supply.c
> index 0529e5628c24..40cc2d462ba0 100644
> --- a/drivers/staging/greybus/power_supply.c
> +++ b/drivers/staging/greybus/power_supply.c
> @@ -520,8 +520,8 @@ static int 
> gb_power_supply_prop_descriptors_get(struct gb_power_supply 
> *gbpsy)
>  
>  	op = gb_operation_create(connection,
>  				 GB_POWER_SUPPLY_TYPE_GET_PROP_DESCRIPTORS,
> -				 sizeof(req), sizeof(*resp) + 
> props_count *
> -				 sizeof(struct 
> gb_power_supply_props_desc),
> +				 sizeof(req),
> +				 struct_size(resp, props, 
> props_count),
>  				 GFP_KERNEL);
>  	if (!op)
>  		return -ENOMEM;