Patchwork [1/6] xen-netfront: remove unused variable `extra'

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Submitter Wei Liu
Date March 25, 2013, 11:08 a.m.
Message ID <1364209702-12437-2-git-send-email-wei.liu2@citrix.com>
Download mbox | patch
Permalink /patch/230631/
State Accepted
Delegated to: David Miller
Headers show

Comments

Wei Liu - March 25, 2013, 11:08 a.m.
This variable is supposed to hold reference to the last extra_info in the
loop. However there is only type of extra info here and the loop to process
extra info is missing, so this variable is never used and causes confusion.

Remove it at the moment. We can add it back when necessary.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
---
 drivers/net/xen-netfront.c |    8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)
David Vrabel - March 25, 2013, 2:21 p.m.
On 25/03/13 11:08, Wei Liu wrote:
> This variable is supposed to hold reference to the last extra_info in the
> loop. However there is only type of extra info here and the loop to process
> extra info is missing, so this variable is never used and causes confusion.
> 
> Remove it at the moment. We can add it back when necessary.
> 
> Signed-off-by: Wei Liu <wei.liu2@citrix.com>

Obviously correct.

Reviewed-by: David Vrabel <david.vrabel@citrix.com>

David
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David Miller - March 25, 2013, 4:20 p.m.
From: Wei Liu <wei.liu2@citrix.com>
Date: Mon, 25 Mar 2013 11:08:17 +0000

> This variable is supposed to hold reference to the last extra_info in the
> loop. However there is only type of extra info here and the loop to process
> extra info is missing, so this variable is never used and causes confusion.
> 
> Remove it at the moment. We can add it back when necessary.
> 
> Signed-off-by: Wei Liu <wei.liu2@citrix.com>

Applied.
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Patch

diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
index 7ffa43b..5527663 100644
--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -537,7 +537,6 @@  static int xennet_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	struct netfront_info *np = netdev_priv(dev);
 	struct netfront_stats *stats = this_cpu_ptr(np->stats);
 	struct xen_netif_tx_request *tx;
-	struct xen_netif_extra_info *extra;
 	char *data = skb->data;
 	RING_IDX i;
 	grant_ref_t ref;
@@ -581,7 +580,6 @@  static int xennet_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	tx->gref = np->grant_tx_ref[id] = ref;
 	tx->offset = offset;
 	tx->size = len;
-	extra = NULL;
 
 	tx->flags = 0;
 	if (skb->ip_summed == CHECKSUM_PARTIAL)
@@ -597,10 +595,7 @@  static int xennet_start_xmit(struct sk_buff *skb, struct net_device *dev)
 		gso = (struct xen_netif_extra_info *)
 			RING_GET_REQUEST(&np->tx, ++i);
 
-		if (extra)
-			extra->flags |= XEN_NETIF_EXTRA_FLAG_MORE;
-		else
-			tx->flags |= XEN_NETTXF_extra_info;
+		tx->flags |= XEN_NETTXF_extra_info;
 
 		gso->u.gso.size = skb_shinfo(skb)->gso_size;
 		gso->u.gso.type = XEN_NETIF_GSO_TYPE_TCPV4;
@@ -609,7 +604,6 @@  static int xennet_start_xmit(struct sk_buff *skb, struct net_device *dev)
 
 		gso->type = XEN_NETIF_EXTRA_TYPE_GSO;
 		gso->flags = 0;
-		extra = gso;
 	}
 
 	np->tx.req_prod_pvt = i + 1;