linux-kernel - [PATCH net-next 06/12] net: hns3: minor cleanup in hns3_clean_rx

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Message-ID: <1564631745-36733-7-git-send-email-tanhuazhong@huawei.com>
Date:   Thu, 1 Aug 2019 11:55:39 +0800
From:   Huazhong Tan <tanhuazhong@...wei.com>
To:     <davem@...emloft.net>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <salil.mehta@...wei.com>, <yisen.zhuang@...wei.com>,
        <linuxarm@...wei.com>, Yunsheng Lin <linyunsheng@...wei.com>,
        Huazhong Tan <tanhuazhong@...wei.com>
Subject: [PATCH net-next 06/12] net: hns3: minor cleanup in hns3_clean_rx_ring

From: Yunsheng Lin <linyunsheng@...wei.com>

The unused_count variable is used to indicate how many
RX BD need attaching new buffer in hns3_clean_rx_ring,
and the clean_count variable has the similar meaning.

This patch removes the clean_count variable and use
unused_count to uniformly indicate the RX BD that need
attaching new buffer.

This patch also clean up some coding style related to
variable assignment in hns3_clean_rx_ring.

Signed-off-by: Yunsheng Lin <linyunsheng@...wei.com>
Reviewed-by: Peng Li <lipeng321@...wei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@...wei.com>
---
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 20 +++++++++-----------
 1 file changed, 9 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index 79973a0..ed05fb9 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -2909,24 +2909,22 @@ int hns3_clean_rx_ring(struct hns3_enet_ring *ring, int budget,
 		       void (*rx_fn)(struct hns3_enet_ring *, struct sk_buff *))
 {
 #define RCB_NOF_ALLOC_RX_BUFF_ONCE 16
-	int recv_pkts, recv_bds, clean_count, err;
 	int unused_count = hns3_desc_unused(ring);
 	struct sk_buff *skb = ring->skb;
-	int num;
+	int recv_pkts = 0;
+	int recv_bds = 0;
+	int err, num;
 
 	num = readl_relaxed(ring->tqp->io_base + HNS3_RING_RX_RING_FBDNUM_REG);
 	rmb(); /* Make sure num taken effect before the other data is touched */
 
-	recv_pkts = 0, recv_bds = 0, clean_count = 0;
 	num -= unused_count;
 	unused_count -= ring->pending_buf;
 
 	while (recv_pkts < budget && recv_bds < num) {
 		/* Reuse or realloc buffers */
-		if (clean_count + unused_count >= RCB_NOF_ALLOC_RX_BUFF_ONCE) {
-			hns3_nic_alloc_rx_buffers(ring,
-						  clean_count + unused_count);
-			clean_count = 0;
+		if (unused_count >= RCB_NOF_ALLOC_RX_BUFF_ONCE) {
+			hns3_nic_alloc_rx_buffers(ring, unused_count);
 			unused_count = hns3_desc_unused(ring) -
 					ring->pending_buf;
 		}
@@ -2940,7 +2938,7 @@ int hns3_clean_rx_ring(struct hns3_enet_ring *ring, int budget,
 			goto out;
 		} else if (unlikely(err)) {  /* Do jump the err */
 			recv_bds += ring->pending_buf;
-			clean_count += ring->pending_buf;
+			unused_count += ring->pending_buf;
 			ring->skb = NULL;
 			ring->pending_buf = 0;
 			continue;
@@ -2948,7 +2946,7 @@ int hns3_clean_rx_ring(struct hns3_enet_ring *ring, int budget,
 
 		rx_fn(ring, skb);
 		recv_bds += ring->pending_buf;
-		clean_count += ring->pending_buf;
+		unused_count += ring->pending_buf;
 		ring->skb = NULL;
 		ring->pending_buf = 0;
 
@@ -2957,8 +2955,8 @@ int hns3_clean_rx_ring(struct hns3_enet_ring *ring, int budget,
 
 out:
 	/* Make all data has been write before submit */
-	if (clean_count + unused_count > 0)
-		hns3_nic_alloc_rx_buffers(ring, clean_count + unused_count);
+	if (unused_count > 0)
+		hns3_nic_alloc_rx_buffers(ring, unused_count);
 
 	return recv_pkts;
 }
-- 
2.7.4