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vmxnet3: Add locking for access to command register

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Access to cmd register is racey, especially in smp environments. Protect
it using a spinlock.

Signed-off-by: Matthieu Bucchianeri <matthieu@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:
Shreyas Bhatewara
2011-01-14 14:59:57 +00:00
committed by David S. Miller
parent 51956cd68b
commit 83d0feffc5
3 changed files with 54 additions and 0 deletions
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drivers/net/vmxnet3/vmxnet3_int.h
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@@ -317,6 +317,7 @@ struct vmxnet3_adapter {
struct vmxnet3_rx_queue rx_queue[VMXNET3_DEVICE_MAX_RX_QUEUES];
struct vlan_group *vlan_grp;
struct vmxnet3_intr intr;
spinlock_t cmd_lock;
struct Vmxnet3_DriverShared *shared;
struct Vmxnet3_PMConf *pm_conf;
struct Vmxnet3_TxQueueDesc *tqd_start; /* all tx queue desc */