diff options
| author |   Daniel Borkmann <dborkman@redhat.com> | 2014-02-16 15:55:21 +0100 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-02-17 00:36:34 -0500 |
| commit | b9507bdaf40e91fea2b1c0c1ee7dc627c8ee6fd6 (patch) | |
| tree | 277be7b469483258b41497d1e47901cf745a1e62 /include/linux | |
| parent | netdevice: add queue selection fallback handler for ndo_select_queue (diff) | |
| download | linux-dev-b9507bdaf40e91fea2b1c0c1ee7dc627c8ee6fd6.tar.xz linux-dev-b9507bdaf40e91fea2b1c0c1ee7dc627c8ee6fd6.zip | |
netdevice: move netdev_cap_txqueue for shared usage to header
In order to allow users to invoke netdev_cap_txqueue, it needs to
be moved into netdevice.h header file. While at it, also add kernel
doc header to document the API.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/netdevice.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 1de9c136b066..e8eeebd49a98 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -2279,6 +2279,26 @@ static inline void netdev_reset_queue(struct net_device *dev_queue) } /** + * netdev_cap_txqueue - check if selected tx queue exceeds device queues + * @dev: network device + * @queue_index: given tx queue index + * + * Returns 0 if given tx queue index >= number of device tx queues, + * otherwise returns the originally passed tx queue index. + */ +static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index) +{ + if (unlikely(queue_index >= dev->real_num_tx_queues)) { + net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n", + dev->name, queue_index, + dev->real_num_tx_queues); + return 0; + } + + return queue_index; +} + +/** * netif_running - test if up * @dev: network device * |