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authorBhavesh Davda <bhavesh@vmware.com>2013-03-06 16:04:53 +0400
committerDavid S. Miller <davem@davemloft.net>2013-03-08 01:10:47 +0400
commite4fabf2b6e6d75752d5eede57f23ff8e9c6aa09b (patch)
tree9ec06708fed8c38ad59273d58a629a6852bfa577 /drivers/net/vmxnet3
parentc5b156794736142fa3120d488f260ff26da3d134 (diff)
downloadlinux-e4fabf2b6e6d75752d5eede57f23ff8e9c6aa09b.tar.xz
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 <bhavesh@vmware.com> Signed-off-by: Shreyas N Bhatewara <sbhatewara@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/vmxnet3')
-rw-r--r--drivers/net/vmxnet3/vmxnet3_drv.c1
-rw-r--r--drivers/net/vmxnet3/vmxnet3_ethtool.c6
-rw-r--r--drivers/net/vmxnet3/vmxnet3_int.h4
3 files changed, 9 insertions, 2 deletions
diff --git a/drivers/net/vmxnet3/vmxnet3_drv.c b/drivers/net/vmxnet3/vmxnet3_drv.c
index 4aad350e4dae..eae7a03d4f9b 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 a0feb17a0238..63a124340cbe 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 3198384689d9..35418146fa17 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. */