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staging: greybus: power_supply: use struct_size() helper 

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>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Reviewed-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gustavo A. R. Silva 2019-04-17 13:44:40 -05:00 committed by Greg Kroah-Hartman
parent 24c9f9b66a
commit 827c085bae
1 changed files with 2 additions and 2 deletions
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4
drivers/staging/greybus/power_supply.c
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@ -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;