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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
View file

@ -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);

5
drivers/net/vmxnet3/vmxnet3_int.h
View file

@ -55,6 +55,7 @@
#include <linux/if_vlan.h>
#include <linux/if_arp.h>
#include <linux/inetdevice.h>
#include <linux/log2.h>
#include "vmxnet3_defs.h"
@ -68,10 +69,10 @@
/*
* Version numbers
*/
#define VMXNET3_DRIVER_VERSION_STRING "1.1.14.0-k"
#define VMXNET3_DRIVER_VERSION_STRING "1.1.18.0-k"
/* a 32-bit int, each byte encode a verion number in VMXNET3_DRIVER_VERSION */
#define VMXNET3_DRIVER_VERSION_NUM 0x01010E00
#define VMXNET3_DRIVER_VERSION_NUM 0x01011200
#if defined(CONFIG_PCI_MSI)
/* RSS only makes sense if MSI-X is supported. */