iio: at91_adc: Use devm_kcalloc to allocate arrays

Use dev_kcalloc instead of devm_kzalloc to allocate arrays since it is
semantically more appropriate.

While we are at it the patch also fixes the following coccinelle warning:
	drivers/iio/adc/at91_adc.c:277:25-31: ERROR: application of sizeof to pointer

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-By: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 6 insertions, 10 deletions

diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index 2e2c9a80aa37..a9176722042f 100644
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -123,10 +123,8 @@ static int at91_adc_channel_init(struct iio_dev *idev)
         idev->num_channels = bitmap_weight(&st->channels_mask,
                                            st->num_channels) + 1;
 
-        chan_array = devm_kzalloc(&idev->dev,
-                                  ((idev->num_channels + 1) *
-                                        sizeof(struct iio_chan_spec)),
-                                  GFP_KERNEL);
+        chan_array = devm_kcalloc(&idev->dev, idev->num_channels + 1,
+                                        sizeof(*chan_array), GFP_KERNEL);
 
         if (!chan_array)
                 return -ENOMEM;
@@ -270,9 +268,8 @@ static int at91_adc_trigger_init(struct iio_dev *idev)
         struct at91_adc_state *st = iio_priv(idev);
         int i, ret;
 
-        st->trig = devm_kzalloc(&idev->dev,
-                                st->trigger_number * sizeof(st->trig),
-                                GFP_KERNEL);
+        st->trig = devm_kcalloc(&idev->dev, st->trigger_number,
+                                sizeof(*st->trig), GFP_KERNEL);
 
         if (st->trig == NULL) {
                 ret = -ENOMEM;
@@ -454,9 +451,8 @@ static int at91_adc_probe_dt(struct at91_adc_state *st,
         st->registers->trigger_register = prop;
 
         st->trigger_number = of_get_child_count(node);
-        st->trigger_list = devm_kzalloc(&idev->dev, st->trigger_number *
-                                        sizeof(struct at91_adc_trigger),
-                                        GFP_KERNEL);
+        st->trigger_list = devm_kcalloc(&idev->dev, st->trigger_number,
+                                        sizeof(*st->trigger_list), GFP_KERNEL);
         if (!st->trigger_list) {
                 dev_err(&idev->dev, "Could not allocate trigger list memory.\n");
                 ret = -ENOMEM;