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vmxnet3: prevent div-by-zero panic when ring resizing uninitialized dev

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Linux is free to call ethtool ops as soon as a netdev exists when probe
finishes. However, we only allocate vmxnet3 tx/rx queues and initialize the
rx_buf_per_pkt field in struct vmxnet3_adapter when the interface is
opened (UP).

Signed-off-by: Bhavesh Davda <bhavesh@vmware.com>
Signed-off-by: Shreyas N Bhatewara <sbhatewara@vmware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Bhavesh Davda 2013-03-06 12:04:53 +00:00 committed by David S. Miller
parent c5b1567947
commit e4fabf2b6e
3 changed files with 9 additions and 2 deletions
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1
drivers/net/vmxnet3/vmxnet3_drv.c
View File

@ -2958,6 +2958,7 @@ vmxnet3_probe_device(struct pci_dev *pdev,
adapter->num_rx_queues = num_rx_queues;
adapter->num_tx_queues = num_tx_queues;
adapter->rx_buf_per_pkt = 1;
size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues;
size += sizeof(struct Vmxnet3_RxQueueDesc) * adapter->num_rx_queues;

6
drivers/net/vmxnet3/vmxnet3_ethtool.c
View File

@ -472,6 +472,12 @@ vmxnet3_set_ringparam(struct net_device *netdev,
VMXNET3_RX_RING_MAX_SIZE)
return -EINVAL;
/* if adapter not yet initialized, do nothing */
if (adapter->rx_buf_per_pkt == 0) {
netdev_err(netdev, "adapter not completely initialized, "
"ring size cannot be changed yet\n");
return -EOPNOTSUPP;
}
/* round it up to a multiple of VMXNET3_RING_SIZE_ALIGN */
new_tx_ring_size = (param->tx_pending + VMXNET3_RING_SIZE_MASK) &

4
drivers/net/vmxnet3/vmxnet3_int.h
View File

@ -70,10 +70,10 @@
/*
* Version numbers
*/
#define VMXNET3_DRIVER_VERSION_STRING "1.1.29.0-k"
#define VMXNET3_DRIVER_VERSION_STRING "1.1.30.0-k"
/* a 32-bit int, each byte encode a verion number in VMXNET3_DRIVER_VERSION */
#define VMXNET3_DRIVER_VERSION_NUM 0x01011D00
#define VMXNET3_DRIVER_VERSION_NUM 0x01011E00
#if defined(CONFIG_PCI_MSI)
/* RSS only makes sense if MSI-X is supported. */