linux-kernel - [PATCH] usbip: Use min to simplify stub_send_ret

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Message-ID: <20251017091923.1694-2-thorsten.blum@linux.dev>
Date: Fri, 17 Oct 2025 11:19:23 +0200
From: Thorsten Blum <thorsten.blum@...ux.dev>
To: Valentina Manea <valentina.manea.m@...il.com>,
	Shuah Khan <shuah@...nel.org>,
	Hongren Zheng <i@...ithal.me>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Thorsten Blum <thorsten.blum@...ux.dev>,
	linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] usbip: Use min to simplify stub_send_ret_submit

Use min() to improve stub_send_ret_submit(). Change the local variable
'size' from 'int' to 'unsigned int' to prevent a signedness error and to
match the resulting type.

Signed-off-by: Thorsten Blum <thorsten.blum@...ux.dev>
---
 drivers/usb/usbip/stub_tx.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/usb/usbip/stub_tx.c b/drivers/usb/usbip/stub_tx.c
index 7eb2e074012a..55919c3762ba 100644
--- a/drivers/usb/usbip/stub_tx.c
+++ b/drivers/usb/usbip/stub_tx.c
@@ -4,6 +4,7 @@
  */
 
 #include <linux/kthread.h>
+#include <linux/minmax.h>
 #include <linux/socket.h>
 #include <linux/scatterlist.h>
 
@@ -239,17 +240,13 @@ static int stub_send_ret_submit(struct stub_device *sdev)
 		    urb->actual_length > 0) {
 			if (urb->num_sgs) {
 				unsigned int copy = urb->actual_length;
-				int size;
+				unsigned int size;
 
 				for_each_sg(urb->sg, sg, urb->num_sgs, i) {
 					if (copy == 0)
 						break;
 
-					if (copy < sg->length)
-						size = copy;
-					else
-						size = sg->length;
-
+					size = min(copy, sg->length);
 					iov[iovnum].iov_base = sg_virt(sg);
 					iov[iovnum].iov_len = size;
 
-- 
2.50.1