From: Bhavesh Davda Date: Wed, 6 Mar 2013 12:04:53 +0000 (+0000) Subject: vmxnet3: prevent div-by-zero panic when ring resizing uninitialized dev X-Git-Tag: v3.12-rc1~1247^2~23 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e4fabf2b6e6d75752d5eede57f23ff8e9c6aa09b;p=kernel%2Fkernel-generic.git vmxnet3: prevent div-by-zero panic when ring resizing uninitialized dev 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 Signed-off-by: Shreyas N Bhatewara Signed-off-by: David S. Miller --- diff --git a/drivers/net/vmxnet3/vmxnet3_drv.c b/drivers/net/vmxnet3/vmxnet3_drv.c index 4aad350..eae7a03 100644 --- a/drivers/net/vmxnet3/vmxnet3_drv.c +++ b/drivers/net/vmxnet3/vmxnet3_drv.c @@ -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; diff --git a/drivers/net/vmxnet3/vmxnet3_ethtool.c b/drivers/net/vmxnet3/vmxnet3_ethtool.c index a0feb17..63a1243 100644 --- a/drivers/net/vmxnet3/vmxnet3_ethtool.c +++ b/drivers/net/vmxnet3/vmxnet3_ethtool.c @@ -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) & diff --git a/drivers/net/vmxnet3/vmxnet3_int.h b/drivers/net/vmxnet3/vmxnet3_int.h index 3198384..3541814 100644 --- a/drivers/net/vmxnet3/vmxnet3_int.h +++ b/drivers/net/vmxnet3/vmxnet3_int.h @@ -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. */