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Message-Id: <20240913014731.149739-1-qianqiang.liu@163.com>
Date: Fri, 13 Sep 2024 09:47:32 +0800
From: Qianqiang Liu <qianqiang.liu@....com>
To: kuba@...nel.org,
edumazet@...gle.com
Cc: usama.anjum@...labora.com,
andrew@...n.ch,
o.rempel@...gutronix.de,
rosenp@...il.com,
netdev@...r.kernel.org,
linux-kernel@...r.kernel.org,
Qianqiang Liu <qianqiang.liu@....com>
Subject: [PATCH v2] net: ag71xx: remove dead code path
The "err" is always zero, so the following branch can never be executed:
if (err) {
ndev->stats.rx_dropped++;
kfree_skb(skb);
}
Therefore, the "if" statement can be removed.
Use "ndev->stats.rx_errors" to count "napi_build_skb()" failure
Signed-off-by: Qianqiang Liu <qianqiang.liu@....com>
---
Changes since v1:
- Use "ndev->stats.rx_errors" to count "napi_build_skb()" failure
---
drivers/net/ethernet/atheros/ag71xx.c | 13 ++++---------
1 file changed, 4 insertions(+), 9 deletions(-)
diff --git a/drivers/net/ethernet/atheros/ag71xx.c b/drivers/net/ethernet/atheros/ag71xx.c
index 96a6189cc31e..9586b6894f7e 100644
--- a/drivers/net/ethernet/atheros/ag71xx.c
+++ b/drivers/net/ethernet/atheros/ag71xx.c
@@ -1616,7 +1616,6 @@ static int ag71xx_rx_packets(struct ag71xx *ag, int limit)
unsigned int i = ring->curr & ring_mask;
struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
int pktlen;
- int err = 0;
if (ag71xx_desc_empty(desc))
break;
@@ -1639,6 +1638,7 @@ static int ag71xx_rx_packets(struct ag71xx *ag, int limit)
skb = napi_build_skb(ring->buf[i].rx.rx_buf, ag71xx_buffer_size(ag));
if (!skb) {
+ ndev->stats.rx_errors++;
skb_free_frag(ring->buf[i].rx.rx_buf);
goto next;
}
@@ -1646,14 +1646,9 @@ static int ag71xx_rx_packets(struct ag71xx *ag, int limit)
skb_reserve(skb, offset);
skb_put(skb, pktlen);
- if (err) {
- ndev->stats.rx_dropped++;
- kfree_skb(skb);
- } else {
- skb->dev = ndev;
- skb->ip_summed = CHECKSUM_NONE;
- list_add_tail(&skb->list, &rx_list);
- }
+ skb->dev = ndev;
+ skb->ip_summed = CHECKSUM_NONE;
+ list_add_tail(&skb->list, &rx_list);
next:
ring->buf[i].rx.rx_buf = NULL;
--
2.34.1
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