linux-kernel - [PATCH] usb: xhci: Remove useless variable

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Message-ID: <20210515084647.179580-1-chengzhihao1@huawei.com>
Date:   Sat, 15 May 2021 16:46:47 +0800
From:   Zhihao Cheng <chengzhihao1@...wei.com>
To:     <mathias.nyman@...el.com>, <gregkh@...uxfoundation.org>
CC:     <linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <chengzhihao1@...wei.com>, <yi.zhang@...wei.com>,
        <yukuai3@...wei.com>
Subject: [PATCH] usb: xhci: Remove useless variable

Fix the following gcc warning:

drivers/usb/host/xhci.c:1349:15: warning: variable ‘len’ set but not
used [-Wunused-but-set-variable ]

Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Zhihao Cheng <chengzhihao1@...wei.com>
---
 drivers/usb/host/xhci.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index ca9385d22f68..b38a14ef2e15 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -1346,7 +1346,6 @@ static bool xhci_urb_temp_buffer_required(struct usb_hcd *hcd,
 
 static void xhci_unmap_temp_buf(struct usb_hcd *hcd, struct urb *urb)
 {
-	unsigned int len;
 	unsigned int buf_len;
 	enum dma_data_direction dir;
 
@@ -1362,10 +1361,10 @@ static void xhci_unmap_temp_buf(struct usb_hcd *hcd, struct urb *urb)
 				 dir);
 
 	if (usb_urb_dir_in(urb))
-		len = sg_pcopy_from_buffer(urb->sg, urb->num_sgs,
-					   urb->transfer_buffer,
-					   buf_len,
-					   0);
+		sg_pcopy_from_buffer(urb->sg, urb->num_sgs,
+				     urb->transfer_buffer,
+				     buf_len,
+				     0);
 
 	urb->transfer_flags &= ~URB_DMA_MAP_SINGLE;
 	kfree(urb->transfer_buffer);
-- 
2.25.4