linux-kernel - [PATCH RESEND] usb: storage: realtek_cr: Simplify residue calculation in rts51x_bulk

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Message-ID: <20250828162623.4840-3-thorsten.blum@linux.dev>
Date: Thu, 28 Aug 2025 18:26:24 +0200
From: Thorsten Blum <thorsten.blum@...ux.dev>
To: Alan Stern <stern@...land.harvard.edu>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Thorsten Blum <thorsten.blum@...ux.dev>,
	linux-usb@...r.kernel.org,
	usb-storage@...ts.one-eyed-alien.net,
	linux-kernel@...r.kernel.org
Subject: [PATCH RESEND] usb: storage: realtek_cr: Simplify residue calculation in rts51x_bulk_transport()

Simplify the calculation of 'residue' in rts51x_bulk_transport() and
avoid unnecessarily reassigning 'residue' to itself.

Acked-by: Alan Stern <stern@...land.harvard.edu>
Signed-off-by: Thorsten Blum <thorsten.blum@...ux.dev>
---
 drivers/usb/storage/realtek_cr.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/storage/realtek_cr.c b/drivers/usb/storage/realtek_cr.c
index 2a6c7c567e1c..758258a569a6 100644
--- a/drivers/usb/storage/realtek_cr.c
+++ b/drivers/usb/storage/realtek_cr.c
@@ -261,8 +261,8 @@ static int rts51x_bulk_transport(struct us_data *us, u8 lun,
 	 * try to compute the actual residue, based on how much data
 	 * was really transferred and what the device tells us
 	 */
-	if (residue)
-		residue = residue < buf_len ? residue : buf_len;
+	if (residue > buf_len)
+		residue = buf_len;
 
 	if (act_len)
 		*act_len = buf_len - residue;
-- 
2.50.1