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Subject[PATCH] 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>
---
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;
--
2.21.0
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