diff options
| author |   Tom Herbert <therbert@google.com> | 2010-10-18 18:00:16 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2010-10-20 02:27:59 -0700 |
| commit | bd25fa7ba59cd26094319dfba0011b48465f7355 (patch) | |
| tree | 34527956dacf0309d30257b02272e97e729219c9 /net/core | |
| parent | net: fail alloc_netdev_mq if queue count < 1 (diff) | |
| download | linux-dev-bd25fa7ba59cd26094319dfba0011b48465f7355.tar.xz linux-dev-bd25fa7ba59cd26094319dfba0011b48465f7355.zip | |
net: cleanups in RX queue allocation
Clean up in RX queue allocation. In netif_set_real_num_rx_queues
return error on attempt to set zero queues, or requested number is
greater than number of allocated queues. In netif_alloc_rx_queues,
do BUG_ON if queue_count is zero.
Signed-off-by: Tom Herbert <therbert@google.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/dev.c | 36 |
1 files changed, 17 insertions, 19 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index f44d29ae5d67..d33adecec44b 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1583,12 +1583,12 @@ int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq) { int rc; + if (rxq < 1 || rxq > dev->num_rx_queues) + return -EINVAL; + if (dev->reg_state == NETREG_REGISTERED) { ASSERT_RTNL(); - if (rxq > dev->num_rx_queues) - return -EINVAL; - rc = net_rx_queue_update_kobjects(dev, dev->real_num_rx_queues, rxq); if (rc) @@ -5013,25 +5013,23 @@ static int netif_alloc_rx_queues(struct net_device *dev) { #ifdef CONFIG_RPS unsigned int i, count = dev->num_rx_queues; + struct netdev_rx_queue *rx; - if (count) { - struct netdev_rx_queue *rx; - - rx = kcalloc(count, sizeof(struct netdev_rx_queue), GFP_KERNEL); - if (!rx) { - pr_err("netdev: Unable to allocate %u rx queues.\n", - count); - return -ENOMEM; - } - dev->_rx = rx; + BUG_ON(count < 1); - /* - * Set a pointer to first element in the array which holds the - * reference count. - */ - for (i = 0; i < count; i++) - rx[i].first = rx; + rx = kcalloc(count, sizeof(struct netdev_rx_queue), GFP_KERNEL); + if (!rx) { + pr_err("netdev: Unable to allocate %u rx queues.\n", count); + return -ENOMEM; } + dev->_rx = rx; + + /* + * Set a pointer to first element in the array which holds the + * reference count. + */ + for (i = 0; i < count; i++) + rx[i].first = rx; #endif return 0; } |