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net: macb: kill useless use of list_empty()

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The list_for_each_entry() macro already handles the case where the list
is empty (by not executing the loop body).  It's not necessary to handle
this case specially, so stop doing so.

Cc: Rafal Ozieblo <rafalo@cadence.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Julia Cartwright <julia@ni.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Julia Cartwright 2017-12-05 18:02:48 -06:00 committed by David S. Miller
parent 9a63b255df
commit a3da8adcb5
1 changed files with 12 additions and 19 deletions
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31
drivers/net/ethernet/cadence/macb_main.c
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@ -2812,24 +2812,20 @@ static int gem_add_flow_filter(struct net_device *netdev,
htons(fs->h_u.tcp_ip4_spec.psrc), htons(fs->h_u.tcp_ip4_spec.pdst));
/* find correct place to add in list */
if (list_empty(&bp->rx_fs_list.list))
list_add(&newfs->list, &bp->rx_fs_list.list);
else {
list_for_each_entry(item, &bp->rx_fs_list.list, list) {
if (item->fs.location > newfs->fs.location) {
list_add_tail(&newfs->list, &item->list);
added = true;
break;
} else if (item->fs.location == fs->location) {
netdev_err(netdev, "Rule not added: location %d not free!\n",
fs->location);
ret = -EBUSY;
goto err;
}
list_for_each_entry(item, &bp->rx_fs_list.list, list) {
if (item->fs.location > newfs->fs.location) {
list_add_tail(&newfs->list, &item->list);
added = true;
break;
} else if (item->fs.location == fs->location) {
netdev_err(netdev, "Rule not added: location %d not free!\n",
fs->location);
ret = -EBUSY;
goto err;
}
if (!added)
list_add_tail(&newfs->list, &bp->rx_fs_list.list);
}
if (!added)
list_add_tail(&newfs->list, &bp->rx_fs_list.list);
gem_prog_cmp_regs(bp, fs);
bp->rx_fs_list.count++;
@ -2851,9 +2847,6 @@ static int gem_del_flow_filter(struct net_device *netdev,
struct ethtool_rx_fs_item *item;
struct ethtool_rx_flow_spec *fs;
if (list_empty(&bp->rx_fs_list.list))
return -EINVAL;
list_for_each_entry(item, &bp->rx_fs_list.list, list) {
if (item->fs.location == cmd->fs.location) {
/* disable screener regs for the flow entry */