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[next] leds: gpio: Use struct_size() in devm_kzalloc()

Message ID 20200619221403.GA12097@embeddedor
State New
Headers show
Series [next] leds: gpio: Use struct_size() in devm_kzalloc() | expand

Commit Message

Gustavo A. R. Silva June 19, 2020, 10:14 p.m. UTC 
Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes. Also, remove unnecessary
function sizeof_gpio_leds_priv().

This code was detected with the help of Coccinelle and, audited and
fixed manually.

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
 drivers/leds/leds-gpio.c | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

Comments

Pavel Machek July 12, 2020, 8:28 a.m. UTC | #1 
On Fri 2020-06-19 17:14:03, 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. Also, remove unnecessary

> function sizeof_gpio_leds_priv().

> 

> This code was detected with the help of Coccinelle and, audited and

> fixed manually.

> 

> Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>


Thanks, applied.
							Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
diff mbox series

Patch

diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c
index 2bf74595610f..30ae453f32f7 100644
--- a/drivers/leds/leds-gpio.c
+++ b/drivers/leds/leds-gpio.c
@@ -125,12 +125,6 @@  struct gpio_leds_priv {
 	struct gpio_led_data leds[];
 };
 
-static inline int sizeof_gpio_leds_priv(int num_leds)
-{
-	return sizeof(struct gpio_leds_priv) +
-		(sizeof(struct gpio_led_data) * num_leds);
-}
-
 static struct gpio_leds_priv *gpio_leds_create(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -142,7 +136,7 @@  static struct gpio_leds_priv *gpio_leds_create(struct platform_device *pdev)
 	if (!count)
 		return ERR_PTR(-ENODEV);
 
-	priv = devm_kzalloc(dev, sizeof_gpio_leds_priv(count), GFP_KERNEL);
+	priv = devm_kzalloc(dev, struct_size(priv, leds, count), GFP_KERNEL);
 	if (!priv)
 		return ERR_PTR(-ENOMEM);
 
@@ -260,9 +254,8 @@  static int gpio_led_probe(struct platform_device *pdev)
 	int i, ret = 0;
 
 	if (pdata && pdata->num_leds) {
-		priv = devm_kzalloc(&pdev->dev,
-				sizeof_gpio_leds_priv(pdata->num_leds),
-					GFP_KERNEL);
+		priv = devm_kzalloc(&pdev->dev, struct_size(priv, leds, pdata->num_leds),
+				    GFP_KERNEL);
 		if (!priv)
 			return -ENOMEM;