linux-kernel - [PATCH] usb: ucsi: stm32: Use min() to improve ucsi_stm32g0_fw

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Message-ID: <20250830110426.10007-2-thorsten.blum@linux.dev>
Date: Sat, 30 Aug 2025 13:04:20 +0200
From: Thorsten Blum <thorsten.blum@...ux.dev>
To: Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Fedor Pchelkin <boddah8794@...il.com>,
	"Christian A. Ehrhardt" <lk@...e.de>,
	Al Viro <viro@...iv.linux.org.uk>
Cc: Thorsten Blum <thorsten.blum@...ux.dev>,
	linux-usb@...r.kernel.org,
	linux-stm32@...md-mailman.stormreply.com,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] usb: ucsi: stm32: Use min() to improve ucsi_stm32g0_fw_cb()

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

Signed-off-by: Thorsten Blum <thorsten.blum@...ux.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