linux-kernel - [PATCH] xhci: remove unused variable

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Date:   Thu,  1 Apr 2021 18:17:15 +0800
From:   Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
To:     mathias.nyman@...el.com
Cc:     gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
Subject: [PATCH] xhci: remove unused variable

Fix the following clang warning:

drivers/usb/host/xhci.c:1346:15: warning: variable ‘len’ set but not
used [-Wunused-but-set-variable].

Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
---
 drivers/usb/host/xhci.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 1975016..0ead09c 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -1343,7 +1343,6 @@ 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;
 
@@ -1359,10 +1358,9 @@ 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);
-- 
1.8.3.1