diff mbox series

[PATCHv2,net-next,1/1] forcedeth: remove unnecessary structure member

Message ID 1512875246-28258-1-git-send-email-yanjun.zhu@oracle.com
State Accepted, archived
Delegated to: David Miller
Headers show
Series [PATCHv2,net-next,1/1] forcedeth: remove unnecessary structure member | expand

Commit Message

Zhu Yanjun Dec. 10, 2017, 3:07 a.m. UTC 
Since both tx_ring and first_tx are the head of tx ring, it not
necessary to use two structure members to statically indicate
the head of tx ring. So first_tx is removed.

CC: Srinivas Eeda <srinivas.eeda@oracle.com>
CC: Joe Jin <joe.jin@oracle.com>
CC: Junxiao Bi <junxiao.bi@oracle.com>
Signed-off-by: Zhu Yanjun <yanjun.zhu@oracle.com>
---
 drivers/net/ethernet/nvidia/forcedeth.c | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

Comments

David Miller Dec. 11, 2017, 7:04 p.m. UTC | #1 
From: Zhu Yanjun <yanjun.zhu@oracle.com>
Date: Sat,  9 Dec 2017 22:07:26 -0500

> Since both tx_ring and first_tx are the head of tx ring, it not
> necessary to use two structure members to statically indicate
> the head of tx ring. So first_tx is removed.
> 
> CC: Srinivas Eeda <srinivas.eeda@oracle.com>
> CC: Joe Jin <joe.jin@oracle.com>
> CC: Junxiao Bi <junxiao.bi@oracle.com>
> Signed-off-by: Zhu Yanjun <yanjun.zhu@oracle.com>

I suspect this extraneous member was meant to be used for multiqueue
support or something like that.

But, it never got really used, and your change is correct.

Applied, thanks.
diff mbox series

Patch

diff --git a/drivers/net/ethernet/nvidia/forcedeth.c b/drivers/net/ethernet/nvidia/forcedeth.c
index 53614ed..cadea67 100644
--- a/drivers/net/ethernet/nvidia/forcedeth.c
+++ b/drivers/net/ethernet/nvidia/forcedeth.c
@@ -822,7 +822,7 @@  struct fe_priv {
 	/*
 	 * tx specific fields.
 	 */
-	union ring_type get_tx, put_tx, first_tx, last_tx;
+	union ring_type get_tx, put_tx, last_tx;
 	struct nv_skb_map *get_tx_ctx, *put_tx_ctx;
 	struct nv_skb_map *first_tx_ctx, *last_tx_ctx;
 	struct nv_skb_map *tx_skb;
@@ -1932,7 +1932,8 @@  static void nv_init_tx(struct net_device *dev)
 	struct fe_priv *np = netdev_priv(dev);
 	int i;
 
-	np->get_tx = np->put_tx = np->first_tx = np->tx_ring;
+	np->get_tx = np->tx_ring;
+	np->put_tx = np->tx_ring;
 
 	if (!nv_optimized(np))
 		np->last_tx.orig = &np->tx_ring.orig[np->tx_ring_size-1];
@@ -2248,7 +2249,7 @@  static netdev_tx_t nv_start_xmit(struct sk_buff *skb, struct net_device *dev)
 		offset += bcnt;
 		size -= bcnt;
 		if (unlikely(put_tx++ == np->last_tx.orig))
-			put_tx = np->first_tx.orig;
+			put_tx = np->tx_ring.orig;
 		if (unlikely(np->put_tx_ctx++ == np->last_tx_ctx))
 			np->put_tx_ctx = np->first_tx_ctx;
 	} while (size);
@@ -2294,13 +2295,13 @@  static netdev_tx_t nv_start_xmit(struct sk_buff *skb, struct net_device *dev)
 			offset += bcnt;
 			frag_size -= bcnt;
 			if (unlikely(put_tx++ == np->last_tx.orig))
-				put_tx = np->first_tx.orig;
+				put_tx = np->tx_ring.orig;
 			if (unlikely(np->put_tx_ctx++ == np->last_tx_ctx))
 				np->put_tx_ctx = np->first_tx_ctx;
 		} while (frag_size);
 	}
 
-	if (unlikely(put_tx == np->first_tx.orig))
+	if (unlikely(put_tx == np->tx_ring.orig))
 		prev_tx = np->last_tx.orig;
 	else
 		prev_tx = put_tx - 1;
@@ -2406,7 +2407,7 @@  static netdev_tx_t nv_start_xmit_optimized(struct sk_buff *skb,
 		offset += bcnt;
 		size -= bcnt;
 		if (unlikely(put_tx++ == np->last_tx.ex))
-			put_tx = np->first_tx.ex;
+			put_tx = np->tx_ring.ex;
 		if (unlikely(np->put_tx_ctx++ == np->last_tx_ctx))
 			np->put_tx_ctx = np->first_tx_ctx;
 	} while (size);
@@ -2452,13 +2453,13 @@  static netdev_tx_t nv_start_xmit_optimized(struct sk_buff *skb,
 			offset += bcnt;
 			frag_size -= bcnt;
 			if (unlikely(put_tx++ == np->last_tx.ex))
-				put_tx = np->first_tx.ex;
+				put_tx = np->tx_ring.ex;
 			if (unlikely(np->put_tx_ctx++ == np->last_tx_ctx))
 				np->put_tx_ctx = np->first_tx_ctx;
 		} while (frag_size);
 	}
 
-	if (unlikely(put_tx == np->first_tx.ex))
+	if (unlikely(put_tx == np->tx_ring.ex))
 		prev_tx = np->last_tx.ex;
 	else
 		prev_tx = put_tx - 1;
@@ -2597,7 +2598,7 @@  static int nv_tx_done(struct net_device *dev, int limit)
 			}
 		}
 		if (unlikely(np->get_tx.orig++ == np->last_tx.orig))
-			np->get_tx.orig = np->first_tx.orig;
+			np->get_tx.orig = np->tx_ring.orig;
 		if (unlikely(np->get_tx_ctx++ == np->last_tx_ctx))
 			np->get_tx_ctx = np->first_tx_ctx;
 	}
@@ -2651,7 +2652,7 @@  static int nv_tx_done_optimized(struct net_device *dev, int limit)
 		}
 
 		if (unlikely(np->get_tx.ex++ == np->last_tx.ex))
-			np->get_tx.ex = np->first_tx.ex;
+			np->get_tx.ex = np->tx_ring.ex;
 		if (unlikely(np->get_tx_ctx++ == np->last_tx_ctx))
 			np->get_tx_ctx = np->first_tx_ctx;
 	}