usb: ucsi: stm32: Use min() to improve ucsi_stm32g0_fw_cb()

[PATCH] usb: ucsi: stm32: Use min() to improve ucsi_stm32g0_fw_cb()

Posted by Thorsten Blum 1 month ago

Use min() to improve ucsi_stm32g0_fw_cb() and avoid calculating
'end - data' twice.

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
---
 drivers/usb/typec/ucsi/ucsi_stm32g0.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/typec/ucsi/ucsi_stm32g0.c b/drivers/usb/typec/ucsi/ucsi_stm32g0.c
index 57ef7d83a412..838ac0185082 100644
--- a/drivers/usb/typec/ucsi/ucsi_stm32g0.c
+++ b/drivers/usb/typec/ucsi/ucsi_stm32g0.c
@@ -10,6 +10,7 @@
 #include <linux/firmware.h>
 #include <linux/i2c.h>
 #include <linux/interrupt.h>
+#include <linux/minmax.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/unaligned.h>
@@ -523,11 +524,7 @@ static void ucsi_stm32g0_fw_cb(const struct firmware *fw, void *context)
 	data = fw->data;
 	end = fw->data + fw->size;
 	while (data < end) {
-		if ((end - data) < STM32G0_I2C_BL_SZ)
-			size = end - data;
-		else
-			size = STM32G0_I2C_BL_SZ;
-
+		size = min(end - data, STM32G0_I2C_BL_SZ);
 		ret = ucsi_stm32g0_bl_write(g0->ucsi, addr, data, size);
 		if (ret) {
 			dev_err(g0->dev, "Write failed %d\n", ret);
-- 
2.50.1

Re: [PATCH] usb: ucsi: stm32: Use min() to improve ucsi_stm32g0_fw_cb()

Posted by Heikki Krogerus 4 weeks ago

On Sat, Aug 30, 2025 at 01:04:20PM +0200, Thorsten Blum wrote:
> Use min() to improve ucsi_stm32g0_fw_cb() and avoid calculating
> 'end - data' twice.
> 
> Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>

Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>

> ---
>  drivers/usb/typec/ucsi/ucsi_stm32g0.c | 7 ++-----
>  1 file changed, 2 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/usb/typec/ucsi/ucsi_stm32g0.c b/drivers/usb/typec/ucsi/ucsi_stm32g0.c
> index 57ef7d83a412..838ac0185082 100644
> --- a/drivers/usb/typec/ucsi/ucsi_stm32g0.c
> +++ b/drivers/usb/typec/ucsi/ucsi_stm32g0.c
> @@ -10,6 +10,7 @@
>  #include <linux/firmware.h>
>  #include <linux/i2c.h>
>  #include <linux/interrupt.h>
> +#include <linux/minmax.h>
>  #include <linux/module.h>
>  #include <linux/platform_device.h>
>  #include <linux/unaligned.h>
> @@ -523,11 +524,7 @@ static void ucsi_stm32g0_fw_cb(const struct firmware *fw, void *context)
>  	data = fw->data;
>  	end = fw->data + fw->size;
>  	while (data < end) {
> -		if ((end - data) < STM32G0_I2C_BL_SZ)
> -			size = end - data;
> -		else
> -			size = STM32G0_I2C_BL_SZ;
> -
> +		size = min(end - data, STM32G0_I2C_BL_SZ);
>  		ret = ucsi_stm32g0_bl_write(g0->ucsi, addr, data, size);
>  		if (ret) {
>  			dev_err(g0->dev, "Write failed %d\n", ret);
> -- 
> 2.50.1

-- 
heikki