diff mbox series

xen-netback: Remove set but unused variable 'pending_idx'

Message ID 20221209034036.37280-1-jiapeng.chong@linux.alibaba.com (mailing list archive)
State New, archived
Headers show
Series xen-netback: Remove set but unused variable 'pending_idx' | expand

Commit Message

Jiapeng Chong Dec. 9, 2022, 3:40 a.m. UTC 
Variable pending_idx is not effectively used in the function, so delete
it.

drivers/net/xen-netback/netback.c:886:7: warning: variable ‘pending_idx’ set but not used.

Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=3399
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
---
 drivers/net/xen-netback/netback.c | 2 --
 1 file changed, 2 deletions(-)

Comments

Saeed Mahameed Dec. 9, 2022, 4:54 a.m. UTC | #1 
On 09 Dec 11:40, Jiapeng Chong wrote:
>Variable pending_idx is not effectively used in the function, so delete
>it.
>
>drivers/net/xen-netback/netback.c:886:7: warning: variable ‘pending_idx’ set but not used.
>
>Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=3399
>Reported-by: Abaci Robot <abaci@linux.alibaba.com>
>Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>

Reviewed-by: Saeed Mahameed <saeed@kernel.org>

Please mark your patch clearly with [PATCH net-next] or 
[PATCH net] if it's a bug fix. 

Thanks for the patch.
kernel test robot Dec. 9, 2022, 6:44 a.m. UTC | #2 
Hi Jiapeng,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.1-rc8 next-20221208]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Jiapeng-Chong/xen-netback-Remove-set-but-unused-variable-pending_idx/20221209-121717
patch link:    https://lore.kernel.org/r/20221209034036.37280-1-jiapeng.chong%40linux.alibaba.com
patch subject: [PATCH] xen-netback: Remove set but unused variable 'pending_idx'
config: x86_64-allyesconfig
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/0a9a4de740b57dfd72a5afe13c96a048ece79171
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Jiapeng-Chong/xen-netback-Remove-set-but-unused-variable-pending_idx/20221209-121717
        git checkout 0a9a4de740b57dfd72a5afe13c96a048ece79171
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/net/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   drivers/net/xen-netback/netback.c: In function 'xenvif_tx_build_gops':
>> drivers/net/xen-netback/netback.c:889:36: warning: variable 'index' set but not used [-Wunused-but-set-variable]
     889 |                 pending_ring_idx_t index;
         |                                    ^~~~~


vim +/index +889 drivers/net/xen-netback/netback.c

210c34dcd8d912 Paul Durrant   2015-09-02   871  
e9ce7cb6b10740 Wei Liu        2014-06-04   872  static void xenvif_tx_build_gops(struct xenvif_queue *queue,
bdab82759b8e36 Zoltan Kiss    2014-04-02   873  				     int budget,
bdab82759b8e36 Zoltan Kiss    2014-04-02   874  				     unsigned *copy_ops,
bdab82759b8e36 Zoltan Kiss    2014-04-02   875  				     unsigned *map_ops)
f942dc2552b8bf Ian Campbell   2011-03-15   876  {
2475b22526d702 Ross Lagerwall 2015-08-03   877  	struct sk_buff *skb, *nskb;
f942dc2552b8bf Ian Campbell   2011-03-15   878  	int ret;
2475b22526d702 Ross Lagerwall 2015-08-03   879  	unsigned int frag_overflow;
f942dc2552b8bf Ian Campbell   2011-03-15   880  
e9ce7cb6b10740 Wei Liu        2014-06-04   881  	while (skb_queue_len(&queue->tx_queue) < budget) {
f942dc2552b8bf Ian Campbell   2011-03-15   882  		struct xen_netif_tx_request txreq;
376414945d15aa Wei Liu        2013-05-02   883  		struct xen_netif_tx_request txfrags[XEN_NETBK_LEGACY_SLOTS_MAX];
f942dc2552b8bf Ian Campbell   2011-03-15   884  		struct xen_netif_extra_info extras[XEN_NETIF_EXTRA_TYPE_MAX-1];
562abd39a19027 Paul Durrant   2016-03-10   885  		unsigned int extra_count;
f942dc2552b8bf Ian Campbell   2011-03-15   886  		RING_IDX idx;
f942dc2552b8bf Ian Campbell   2011-03-15   887  		int work_to_do;
f942dc2552b8bf Ian Campbell   2011-03-15   888  		unsigned int data_len;
f942dc2552b8bf Ian Campbell   2011-03-15  @889  		pending_ring_idx_t index;
f942dc2552b8bf Ian Campbell   2011-03-15   890  
e9ce7cb6b10740 Wei Liu        2014-06-04   891  		if (queue->tx.sring->req_prod - queue->tx.req_cons >
48856286b64e4b Ian Campbell   2013-02-06   892  		    XEN_NETIF_TX_RING_SIZE) {
e9ce7cb6b10740 Wei Liu        2014-06-04   893  			netdev_err(queue->vif->dev,
48856286b64e4b Ian Campbell   2013-02-06   894  				   "Impossible number of requests. "
48856286b64e4b Ian Campbell   2013-02-06   895  				   "req_prod %d, req_cons %d, size %ld\n",
e9ce7cb6b10740 Wei Liu        2014-06-04   896  				   queue->tx.sring->req_prod, queue->tx.req_cons,
48856286b64e4b Ian Campbell   2013-02-06   897  				   XEN_NETIF_TX_RING_SIZE);
e9ce7cb6b10740 Wei Liu        2014-06-04   898  			xenvif_fatal_tx_err(queue->vif);
e9d8b2c2968499 Wei Liu        2014-04-01   899  			break;
48856286b64e4b Ian Campbell   2013-02-06   900  		}
48856286b64e4b Ian Campbell   2013-02-06   901  
09e545f7381459 Juergen Gross  2022-05-30   902  		work_to_do = XEN_RING_NR_UNCONSUMED_REQUESTS(&queue->tx);
b3f980bd827e6e Wei Liu        2013-08-26   903  		if (!work_to_do)
b3f980bd827e6e Wei Liu        2013-08-26   904  			break;
f942dc2552b8bf Ian Campbell   2011-03-15   905  
e9ce7cb6b10740 Wei Liu        2014-06-04   906  		idx = queue->tx.req_cons;
f942dc2552b8bf Ian Campbell   2011-03-15   907  		rmb(); /* Ensure that we see the request before we copy it. */
68a33bfd8403e4 David Vrabel   2015-10-30   908  		RING_COPY_REQUEST(&queue->tx, idx, &txreq);
f942dc2552b8bf Ian Campbell   2011-03-15   909  
f942dc2552b8bf Ian Campbell   2011-03-15   910  		/* Credit-based scheduling. */
e9ce7cb6b10740 Wei Liu        2014-06-04   911  		if (txreq.size > queue->remaining_credit &&
e9ce7cb6b10740 Wei Liu        2014-06-04   912  		    tx_credit_exceeded(queue, txreq.size))
b3f980bd827e6e Wei Liu        2013-08-26   913  			break;
f942dc2552b8bf Ian Campbell   2011-03-15   914  
e9ce7cb6b10740 Wei Liu        2014-06-04   915  		queue->remaining_credit -= txreq.size;
f942dc2552b8bf Ian Campbell   2011-03-15   916  
f942dc2552b8bf Ian Campbell   2011-03-15   917  		work_to_do--;
e9ce7cb6b10740 Wei Liu        2014-06-04   918  		queue->tx.req_cons = ++idx;
f942dc2552b8bf Ian Campbell   2011-03-15   919  
f942dc2552b8bf Ian Campbell   2011-03-15   920  		memset(extras, 0, sizeof(extras));
562abd39a19027 Paul Durrant   2016-03-10   921  		extra_count = 0;
f942dc2552b8bf Ian Campbell   2011-03-15   922  		if (txreq.flags & XEN_NETTXF_extra_info) {
e9ce7cb6b10740 Wei Liu        2014-06-04   923  			work_to_do = xenvif_get_extras(queue, extras,
562abd39a19027 Paul Durrant   2016-03-10   924  						       &extra_count,
f942dc2552b8bf Ian Campbell   2011-03-15   925  						       work_to_do);
e9ce7cb6b10740 Wei Liu        2014-06-04   926  			idx = queue->tx.req_cons;
48856286b64e4b Ian Campbell   2013-02-06   927  			if (unlikely(work_to_do < 0))
b3f980bd827e6e Wei Liu        2013-08-26   928  				break;
f942dc2552b8bf Ian Campbell   2011-03-15   929  		}
f942dc2552b8bf Ian Campbell   2011-03-15   930  
210c34dcd8d912 Paul Durrant   2015-09-02   931  		if (extras[XEN_NETIF_EXTRA_TYPE_MCAST_ADD - 1].type) {
210c34dcd8d912 Paul Durrant   2015-09-02   932  			struct xen_netif_extra_info *extra;
210c34dcd8d912 Paul Durrant   2015-09-02   933  
210c34dcd8d912 Paul Durrant   2015-09-02   934  			extra = &extras[XEN_NETIF_EXTRA_TYPE_MCAST_ADD - 1];
210c34dcd8d912 Paul Durrant   2015-09-02   935  			ret = xenvif_mcast_add(queue->vif, extra->u.mcast.addr);
210c34dcd8d912 Paul Durrant   2015-09-02   936  
562abd39a19027 Paul Durrant   2016-03-10   937  			make_tx_response(queue, &txreq, extra_count,
210c34dcd8d912 Paul Durrant   2015-09-02   938  					 (ret == 0) ?
210c34dcd8d912 Paul Durrant   2015-09-02   939  					 XEN_NETIF_RSP_OKAY :
210c34dcd8d912 Paul Durrant   2015-09-02   940  					 XEN_NETIF_RSP_ERROR);
210c34dcd8d912 Paul Durrant   2015-09-02   941  			push_tx_responses(queue);
210c34dcd8d912 Paul Durrant   2015-09-02   942  			continue;
210c34dcd8d912 Paul Durrant   2015-09-02   943  		}
210c34dcd8d912 Paul Durrant   2015-09-02   944  
210c34dcd8d912 Paul Durrant   2015-09-02   945  		if (extras[XEN_NETIF_EXTRA_TYPE_MCAST_DEL - 1].type) {
210c34dcd8d912 Paul Durrant   2015-09-02   946  			struct xen_netif_extra_info *extra;
210c34dcd8d912 Paul Durrant   2015-09-02   947  
210c34dcd8d912 Paul Durrant   2015-09-02   948  			extra = &extras[XEN_NETIF_EXTRA_TYPE_MCAST_DEL - 1];
210c34dcd8d912 Paul Durrant   2015-09-02   949  			xenvif_mcast_del(queue->vif, extra->u.mcast.addr);
210c34dcd8d912 Paul Durrant   2015-09-02   950  
562abd39a19027 Paul Durrant   2016-03-10   951  			make_tx_response(queue, &txreq, extra_count,
562abd39a19027 Paul Durrant   2016-03-10   952  					 XEN_NETIF_RSP_OKAY);
210c34dcd8d912 Paul Durrant   2015-09-02   953  			push_tx_responses(queue);
210c34dcd8d912 Paul Durrant   2015-09-02   954  			continue;
210c34dcd8d912 Paul Durrant   2015-09-02   955  		}
210c34dcd8d912 Paul Durrant   2015-09-02   956  
ad7f402ae4f466 Ross Lagerwall 2022-11-22   957  		data_len = (txreq.size > XEN_NETBACK_TX_COPY_LEN) ?
ad7f402ae4f466 Ross Lagerwall 2022-11-22   958  			XEN_NETBACK_TX_COPY_LEN : txreq.size;
ad7f402ae4f466 Ross Lagerwall 2022-11-22   959  
562abd39a19027 Paul Durrant   2016-03-10   960  		ret = xenvif_count_requests(queue, &txreq, extra_count,
562abd39a19027 Paul Durrant   2016-03-10   961  					    txfrags, work_to_do);
ad7f402ae4f466 Ross Lagerwall 2022-11-22   962  
48856286b64e4b Ian Campbell   2013-02-06   963  		if (unlikely(ret < 0))
b3f980bd827e6e Wei Liu        2013-08-26   964  			break;
48856286b64e4b Ian Campbell   2013-02-06   965  
f942dc2552b8bf Ian Campbell   2011-03-15   966  		idx += ret;
f942dc2552b8bf Ian Campbell   2011-03-15   967  
f942dc2552b8bf Ian Campbell   2011-03-15   968  		if (unlikely(txreq.size < ETH_HLEN)) {
e9ce7cb6b10740 Wei Liu        2014-06-04   969  			netdev_dbg(queue->vif->dev,
f942dc2552b8bf Ian Campbell   2011-03-15   970  				   "Bad packet size: %d\n", txreq.size);
562abd39a19027 Paul Durrant   2016-03-10   971  			xenvif_tx_err(queue, &txreq, extra_count, idx);
b3f980bd827e6e Wei Liu        2013-08-26   972  			break;
f942dc2552b8bf Ian Campbell   2011-03-15   973  		}
f942dc2552b8bf Ian Campbell   2011-03-15   974  
f942dc2552b8bf Ian Campbell   2011-03-15   975  		/* No crossing a page as the payload mustn't fragment. */
d0089e8a0e4c97 Julien Grall   2015-05-05   976  		if (unlikely((txreq.offset + txreq.size) > XEN_PAGE_SIZE)) {
e9ce7cb6b10740 Wei Liu        2014-06-04   977  			netdev_err(queue->vif->dev,
68946159da1b0b Julien Grall   2015-06-16   978  				   "txreq.offset: %u, size: %u, end: %lu\n",
f942dc2552b8bf Ian Campbell   2011-03-15   979  				   txreq.offset, txreq.size,
d0089e8a0e4c97 Julien Grall   2015-05-05   980  				   (unsigned long)(txreq.offset&~XEN_PAGE_MASK) + txreq.size);
e9ce7cb6b10740 Wei Liu        2014-06-04   981  			xenvif_fatal_tx_err(queue->vif);
b3f980bd827e6e Wei Liu        2013-08-26   982  			break;
f942dc2552b8bf Ian Campbell   2011-03-15   983  		}
f942dc2552b8bf Ian Campbell   2011-03-15   984  
e9ce7cb6b10740 Wei Liu        2014-06-04   985  		index = pending_index(queue->pending_cons);
f942dc2552b8bf Ian Campbell   2011-03-15   986  
ad7f402ae4f466 Ross Lagerwall 2022-11-22   987  		if (ret >= XEN_NETBK_LEGACY_SLOTS_MAX - 1 && data_len < txreq.size)
ad7f402ae4f466 Ross Lagerwall 2022-11-22   988  			data_len = txreq.size;
f942dc2552b8bf Ian Campbell   2011-03-15   989  
e3377f36ca20a0 Zoltan Kiss    2014-03-06   990  		skb = xenvif_alloc_skb(data_len);
f942dc2552b8bf Ian Campbell   2011-03-15   991  		if (unlikely(skb == NULL)) {
e9ce7cb6b10740 Wei Liu        2014-06-04   992  			netdev_dbg(queue->vif->dev,
f942dc2552b8bf Ian Campbell   2011-03-15   993  				   "Can't allocate a skb in start_xmit.\n");
562abd39a19027 Paul Durrant   2016-03-10   994  			xenvif_tx_err(queue, &txreq, extra_count, idx);
f942dc2552b8bf Ian Campbell   2011-03-15   995  			break;
f942dc2552b8bf Ian Campbell   2011-03-15   996  		}
f942dc2552b8bf Ian Campbell   2011-03-15   997  
2475b22526d702 Ross Lagerwall 2015-08-03   998  		skb_shinfo(skb)->nr_frags = ret;
2475b22526d702 Ross Lagerwall 2015-08-03   999  		/* At this point shinfo->nr_frags is in fact the number of
2475b22526d702 Ross Lagerwall 2015-08-03  1000  		 * slots, which can be as large as XEN_NETBK_LEGACY_SLOTS_MAX.
2475b22526d702 Ross Lagerwall 2015-08-03  1001  		 */
2475b22526d702 Ross Lagerwall 2015-08-03  1002  		frag_overflow = 0;
2475b22526d702 Ross Lagerwall 2015-08-03  1003  		nskb = NULL;
2475b22526d702 Ross Lagerwall 2015-08-03  1004  		if (skb_shinfo(skb)->nr_frags > MAX_SKB_FRAGS) {
2475b22526d702 Ross Lagerwall 2015-08-03  1005  			frag_overflow = skb_shinfo(skb)->nr_frags - MAX_SKB_FRAGS;
2475b22526d702 Ross Lagerwall 2015-08-03  1006  			BUG_ON(frag_overflow > MAX_SKB_FRAGS);
2475b22526d702 Ross Lagerwall 2015-08-03  1007  			skb_shinfo(skb)->nr_frags = MAX_SKB_FRAGS;
2475b22526d702 Ross Lagerwall 2015-08-03  1008  			nskb = xenvif_alloc_skb(0);
2475b22526d702 Ross Lagerwall 2015-08-03  1009  			if (unlikely(nskb == NULL)) {
3a0233ddec554b Ross Lagerwall 2019-08-05  1010  				skb_shinfo(skb)->nr_frags = 0;
2475b22526d702 Ross Lagerwall 2015-08-03  1011  				kfree_skb(skb);
562abd39a19027 Paul Durrant   2016-03-10  1012  				xenvif_tx_err(queue, &txreq, extra_count, idx);
2475b22526d702 Ross Lagerwall 2015-08-03  1013  				if (net_ratelimit())
2475b22526d702 Ross Lagerwall 2015-08-03  1014  					netdev_err(queue->vif->dev,
2475b22526d702 Ross Lagerwall 2015-08-03  1015  						   "Can't allocate the frag_list skb.\n");
2475b22526d702 Ross Lagerwall 2015-08-03  1016  				break;
2475b22526d702 Ross Lagerwall 2015-08-03  1017  			}
2475b22526d702 Ross Lagerwall 2015-08-03  1018  		}
2475b22526d702 Ross Lagerwall 2015-08-03  1019  
f942dc2552b8bf Ian Campbell   2011-03-15  1020  		if (extras[XEN_NETIF_EXTRA_TYPE_GSO - 1].type) {
f942dc2552b8bf Ian Campbell   2011-03-15  1021  			struct xen_netif_extra_info *gso;
f942dc2552b8bf Ian Campbell   2011-03-15  1022  			gso = &extras[XEN_NETIF_EXTRA_TYPE_GSO - 1];
f942dc2552b8bf Ian Campbell   2011-03-15  1023  
e9ce7cb6b10740 Wei Liu        2014-06-04  1024  			if (xenvif_set_skb_gso(queue->vif, skb, gso)) {
7376419a469765 Wei Liu        2013-08-26  1025  				/* Failure in xenvif_set_skb_gso is fatal. */
3a0233ddec554b Ross Lagerwall 2019-08-05  1026  				skb_shinfo(skb)->nr_frags = 0;
f942dc2552b8bf Ian Campbell   2011-03-15  1027  				kfree_skb(skb);
2475b22526d702 Ross Lagerwall 2015-08-03  1028  				kfree_skb(nskb);
b3f980bd827e6e Wei Liu        2013-08-26  1029  				break;
f942dc2552b8bf Ian Campbell   2011-03-15  1030  			}
f942dc2552b8bf Ian Campbell   2011-03-15  1031  		}
f942dc2552b8bf Ian Campbell   2011-03-15  1032  
c2d09fde7299f6 Paul Durrant   2016-05-13  1033  		if (extras[XEN_NETIF_EXTRA_TYPE_HASH - 1].type) {
c2d09fde7299f6 Paul Durrant   2016-05-13  1034  			struct xen_netif_extra_info *extra;
c2d09fde7299f6 Paul Durrant   2016-05-13  1035  			enum pkt_hash_types type = PKT_HASH_TYPE_NONE;
c2d09fde7299f6 Paul Durrant   2016-05-13  1036  
c2d09fde7299f6 Paul Durrant   2016-05-13  1037  			extra = &extras[XEN_NETIF_EXTRA_TYPE_HASH - 1];
c2d09fde7299f6 Paul Durrant   2016-05-13  1038  
c2d09fde7299f6 Paul Durrant   2016-05-13  1039  			switch (extra->u.hash.type) {
c2d09fde7299f6 Paul Durrant   2016-05-13  1040  			case _XEN_NETIF_CTRL_HASH_TYPE_IPV4:
c2d09fde7299f6 Paul Durrant   2016-05-13  1041  			case _XEN_NETIF_CTRL_HASH_TYPE_IPV6:
c2d09fde7299f6 Paul Durrant   2016-05-13  1042  				type = PKT_HASH_TYPE_L3;
c2d09fde7299f6 Paul Durrant   2016-05-13  1043  				break;
c2d09fde7299f6 Paul Durrant   2016-05-13  1044  
c2d09fde7299f6 Paul Durrant   2016-05-13  1045  			case _XEN_NETIF_CTRL_HASH_TYPE_IPV4_TCP:
c2d09fde7299f6 Paul Durrant   2016-05-13  1046  			case _XEN_NETIF_CTRL_HASH_TYPE_IPV6_TCP:
c2d09fde7299f6 Paul Durrant   2016-05-13  1047  				type = PKT_HASH_TYPE_L4;
c2d09fde7299f6 Paul Durrant   2016-05-13  1048  				break;
c2d09fde7299f6 Paul Durrant   2016-05-13  1049  
c2d09fde7299f6 Paul Durrant   2016-05-13  1050  			default:
c2d09fde7299f6 Paul Durrant   2016-05-13  1051  				break;
c2d09fde7299f6 Paul Durrant   2016-05-13  1052  			}
c2d09fde7299f6 Paul Durrant   2016-05-13  1053  
c2d09fde7299f6 Paul Durrant   2016-05-13  1054  			if (type != PKT_HASH_TYPE_NONE)
c2d09fde7299f6 Paul Durrant   2016-05-13  1055  				skb_set_hash(skb,
c2d09fde7299f6 Paul Durrant   2016-05-13  1056  					     *(u32 *)extra->u.hash.value,
c2d09fde7299f6 Paul Durrant   2016-05-13  1057  					     type);
c2d09fde7299f6 Paul Durrant   2016-05-13  1058  		}
c2d09fde7299f6 Paul Durrant   2016-05-13  1059  
ad7f402ae4f466 Ross Lagerwall 2022-11-22  1060  		xenvif_get_requests(queue, skb, &txreq, txfrags, copy_ops,
ad7f402ae4f466 Ross Lagerwall 2022-11-22  1061  				    map_ops, frag_overflow, nskb, extra_count,
ad7f402ae4f466 Ross Lagerwall 2022-11-22  1062  				    data_len);
f942dc2552b8bf Ian Campbell   2011-03-15  1063  
e9ce7cb6b10740 Wei Liu        2014-06-04  1064  		__skb_queue_tail(&queue->tx_queue, skb);
1e0b6eac6a150a Annie Li       2012-06-27  1065  
e9ce7cb6b10740 Wei Liu        2014-06-04  1066  		queue->tx.req_cons = idx;
f942dc2552b8bf Ian Campbell   2011-03-15  1067  
ad7f402ae4f466 Ross Lagerwall 2022-11-22  1068  		if ((*map_ops >= ARRAY_SIZE(queue->tx_map_ops)) ||
e9ce7cb6b10740 Wei Liu        2014-06-04  1069  		    (*copy_ops >= ARRAY_SIZE(queue->tx_copy_ops)))
f942dc2552b8bf Ian Campbell   2011-03-15  1070  			break;
f942dc2552b8bf Ian Campbell   2011-03-15  1071  	}
f942dc2552b8bf Ian Campbell   2011-03-15  1072  
bdab82759b8e36 Zoltan Kiss    2014-04-02  1073  	return;
f942dc2552b8bf Ian Campbell   2011-03-15  1074  }
f942dc2552b8bf Ian Campbell   2011-03-15  1075
diff mbox series

Patch

diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c
index 054ac0e897f6..19d928389473 100644
--- a/drivers/net/xen-netback/netback.c
+++ b/drivers/net/xen-netback/netback.c
@@ -883,7 +883,6 @@  static void xenvif_tx_build_gops(struct xenvif_queue *queue,
 		struct xen_netif_tx_request txfrags[XEN_NETBK_LEGACY_SLOTS_MAX];
 		struct xen_netif_extra_info extras[XEN_NETIF_EXTRA_TYPE_MAX-1];
 		unsigned int extra_count;
-		u16 pending_idx;
 		RING_IDX idx;
 		int work_to_do;
 		unsigned int data_len;
@@ -984,7 +983,6 @@  static void xenvif_tx_build_gops(struct xenvif_queue *queue,
 		}
 
 		index = pending_index(queue->pending_cons);
-		pending_idx = queue->pending_ring[index];
 
 		if (ret >= XEN_NETBK_LEGACY_SLOTS_MAX - 1 && data_len < txreq.size)
 			data_len = txreq.size;