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vmxnet3: round down # of queues to power of two

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vmxnet3 device supports only power-of-two number of queues. The driver
therefore needs to check this and rounds down the number of queues to the
nearest power of two.

Signed-off-by: Yong Wang <yongwang@vmware.com>
Signed-off-by: Shreyas N Bhatewara <sbhatewara@vmware.com>
Reviewed-by: Dmitry Torokhov <dtor@vmware.com>
This commit is contained in:
Shreyas Bhatewara
2011-07-07 00:25:52 -07:00
committed by David S. Miller
parent 2e98e7974d
commit eebb02b1f0
2 changed files with 6 additions and 2 deletions
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3
drivers/net/vmxnet3/vmxnet3_drv.c
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@@ -2947,6 +2947,7 @@ vmxnet3_probe_device(struct pci_dev *pdev,
else
#endif
num_rx_queues = 1;
num_rx_queues = rounddown_pow_of_two(num_rx_queues);
if (enable_mq)
num_tx_queues = min(VMXNET3_DEVICE_MAX_TX_QUEUES,
@@ -2954,6 +2955,7 @@ vmxnet3_probe_device(struct pci_dev *pdev,
else
num_tx_queues = 1;
num_tx_queues = rounddown_pow_of_two(num_tx_queues);
netdev = alloc_etherdev_mq(sizeof(struct vmxnet3_adapter),
max(num_tx_queues, num_rx_queues));
printk(KERN_INFO "# of Tx queues : %d, # of Rx queues : %d\n",
@@ -3138,6 +3140,7 @@ vmxnet3_remove_device(struct pci_dev *pdev)
else
#endif
num_rx_queues = 1;
num_rx_queues = rounddown_pow_of_two(num_rx_queues);
cancel_work_sync(&adapter->work);