reset: sti: Use devm_kcalloc() in syscfg_reset_controller_register()

* A multiplication for the size determination of a memory allocation
  indicated that an array data structure should be processed.
  Thus use the corresponding function "devm_kcalloc".

* Replace the specification of a data structure by a pointer dereference
  to make the corresponding size determination a bit safer according to
  the Linux coding style convention.

* Delete the local variable "size" which became unnecessary with
  this refactoring.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/reset/sti/reset-syscfg.c b/drivers/reset/sti/reset-syscfg.c
index 9bd57a5eee72..7e0f2aa55ba7 100644
--- a/drivers/reset/sti/reset-syscfg.c
+++ b/drivers/reset/sti/reset-syscfg.c
@@ -145,16 +145,14 @@ static int syscfg_reset_controller_register(struct device *dev,
                                 const struct syscfg_reset_controller_data *data)
 {
         struct syscfg_reset_controller *rc;
-        size_t size;
         int i, err;
 
         rc = devm_kzalloc(dev, sizeof(*rc), GFP_KERNEL);
         if (!rc)
                 return -ENOMEM;
 
-        size = sizeof(struct syscfg_reset_channel) * data->nr_channels;
-
-        rc->channels = devm_kzalloc(dev, size, GFP_KERNEL);
+        rc->channels = devm_kcalloc(dev, data->nr_channels,
+                                    sizeof(*rc->channels), GFP_KERNEL);
         if (!rc->channels)
                 return -ENOMEM;