Using the vmxnet3 driver produces a lockdep warning because
vmxnet3_set_mc(), which is called with mc->mca_lock held, takes
adapter->cmd_lock.  However, there are a couple of places where
adapter->cmd_lock is taken with softirqs enabled, lockdep warns that a
softirq that tries to take mc->mca_lock could happen while
adapter->cmd_lock is held, leading to an AB-BA deadlock.

I'm not sure if this is a real potential deadlock or not, but the
simplest and best fix seems to be simply to make sure we take cmd_lock
with spin_lock_irqsave() everywhere -- the places with plain spin_lock
just look like oversights.

The full enormous lockdep warning is:

 =========================================================
 [ INFO: possible irq lock inversion dependency detected ]
 2.6.39-rc6+ #1
 ---------------------------------------------------------
 ifconfig/567 just changed the state of lock:
  (&(&mc->mca_lock)->rlock){+.-...}, at: [<ffffffff81531e9f>] mld_ifc_timer_expire+0xff/0x280
 but this lock took another, SOFTIRQ-unsafe lock in the past:
  (&(&adapter->cmd_lock)->rlock){+.+...}

 and interrupts could create inverse lock ordering between them.

 other info that might help us debug this:
 4 locks held by ifconfig/567:
  #0:  (rtnl_mutex){+.+.+.}, at: [<ffffffff8147d547>] rtnl_lock+0x17/0x20
  #1:  ((inetaddr_chain).rwsem){.+.+.+}, at: [<ffffffff810896cf>] __blocking_notifier_call_chain+0x5f/0xb0
  #2:  (&idev->mc_ifc_timer){+.-...}, at: [<ffffffff8106f21b>] run_timer_softirq+0xeb/0x3f0
  #3:  (&ndev->lock){++.-..}, at: [<ffffffff81531dd2>] mld_ifc_timer_expire+0x32/0x280

 the shortest dependencies between 2nd lock and 1st lock:
   -> (&(&adapter->cmd_lock)->rlock){+.+...} ops: 11 {
      HARDIRQ-ON-W at:
                                            [<ffffffff8109ad86>] __lock_acquire+0x7f6/0x1e10
                                            [<ffffffff8109ca4d>] lock_acquire+0x9d/0x130
                                            [<ffffffff81571156>] _raw_spin_lock+0x36/0x70
                                            [<ffffffffa000d212>] vmxnet3_alloc_intr_resources+0x22/0x230 [vmxnet3]
                                            [<ffffffffa0014031>] vmxnet3_probe_device+0x5f6/0x15c5 [vmxnet3]
                                            [<ffffffff812df67f>] local_pci_probe+0x5f/0xd0
                                            [<ffffffff812dfde9>] pci_device_probe+0x119/0x120
                                            [<ffffffff81373df6>] driver_probe_device+0x96/0x1c0
                                            [<ffffffff81373fcb>] __driver_attach+0xab/0xb0
                                            [<ffffffff81372a1e>] bus_for_each_dev+0x5e/0x90
                                            [<ffffffff81373a2e>] driver_attach+0x1e/0x20
                                            [<ffffffff813735b8>] bus_add_driver+0xc8/0x290
                                            [<ffffffff813745b6>] driver_register+0x76/0x140
                                            [<ffffffff812e0046>] __pci_register_driver+0x66/0xe0
                                            [<ffffffffa001b03a>] serio_raw_poll+0x3a/0x60 [serio_raw]
                                            [<ffffffff81002165>] do_one_initcall+0x45/0x190
                                            [<ffffffff810aa76b>] sys_init_module+0xfb/0x250
                                            [<ffffffff8157a142>] system_call_fastpath+0x16/0x1b
      SOFTIRQ-ON-W at:
                                            [<ffffffff8109adb7>] __lock_acquire+0x827/0x1e10
                                            [<ffffffff8109ca4d>] lock_acquire+0x9d/0x130
                                            [<ffffffff81571156>] _raw_spin_lock+0x36/0x70
                                            [<ffffffffa000d212>] vmxnet3_alloc_intr_resources+0x22/0x230 [vmxnet3]
                                            [<ffffffffa0014031>] vmxnet3_probe_device+0x5f6/0x15c5 [vmxnet3]
                                            [<ffffffff812df67f>] local_pci_probe+0x5f/0xd0
                                            [<ffffffff812dfde9>] pci_device_probe+0x119/0x120
                                            [<ffffffff81373df6>] driver_probe_device+0x96/0x1c0
                                            [<ffffffff81373fcb>] __driver_attach+0xab/0xb0
                                            [<ffffffff81372a1e>] bus_for_each_dev+0x5e/0x90
                                            [<ffffffff81373a2e>] driver_attach+0x1e/0x20
                                            [<ffffffff813735b8>] bus_add_driver+0xc8/0x290
                                            [<ffffffff813745b6>] driver_register+0x76/0x140
                                            [<ffffffff812e0046>] __pci_register_driver+0x66/0xe0
                                            [<ffffffffa001b03a>] serio_raw_poll+0x3a/0x60 [serio_raw]
                                            [<ffffffff81002165>] do_one_initcall+0x45/0x190
                                            [<ffffffff810aa76b>] sys_init_module+0xfb/0x250
                                            [<ffffffff8157a142>] system_call_fastpath+0x16/0x1b
      INITIAL USE at:
                                           [<ffffffff8109a9e9>] __lock_acquire+0x459/0x1e10
                                           [<ffffffff8109ca4d>] lock_acquire+0x9d/0x130
                                           [<ffffffff81571156>] _raw_spin_lock+0x36/0x70
                                           [<ffffffffa000d212>] vmxnet3_alloc_intr_resources+0x22/0x230 [vmxnet3]
                                           [<ffffffffa0014031>] vmxnet3_probe_device+0x5f6/0x15c5 [vmxnet3]
                                           [<ffffffff812df67f>] local_pci_probe+0x5f/0xd0
                                           [<ffffffff812dfde9>] pci_device_probe+0x119/0x120
                                           [<ffffffff81373df6>] driver_probe_device+0x96/0x1c0
                                           [<ffffffff81373fcb>] __driver_attach+0xab/0xb0
                                           [<ffffffff81372a1e>] bus_for_each_dev+0x5e/0x90
                                           [<ffffffff81373a2e>] driver_attach+0x1e/0x20
                                           [<ffffffff813735b8>] bus_add_driver+0xc8/0x290
                                           [<ffffffff813745b6>] driver_register+0x76/0x140
                                           [<ffffffff812e0046>] __pci_register_driver+0x66/0xe0
                                           [<ffffffffa001b03a>] serio_raw_poll+0x3a/0x60 [serio_raw]
                                           [<ffffffff81002165>] do_one_initcall+0x45/0x190
                                           [<ffffffff810aa76b>] sys_init_module+0xfb/0x250
                                           [<ffffffff8157a142>] system_call_fastpath+0x16/0x1b
    }
    ... key      at: [<ffffffffa0017590>] __key.42516+0x0/0xffffffffffffda70 [vmxnet3]
    ... acquired at:
    [<ffffffff8109ca4d>] lock_acquire+0x9d/0x130
    [<ffffffff81571bb5>] _raw_spin_lock_irqsave+0x55/0xa0
    [<ffffffffa000de27>] vmxnet3_set_mc+0x97/0x1a0 [vmxnet3]
    [<ffffffff8146ffa0>] __dev_set_rx_mode+0x40/0xb0
    [<ffffffff81470040>] dev_set_rx_mode+0x30/0x50
    [<ffffffff81470127>] __dev_open+0xc7/0x100
    [<ffffffff814703c1>] __dev_change_flags+0xa1/0x180
    [<ffffffff81470568>] dev_change_flags+0x28/0x70
    [<ffffffff814da960>] devinet_ioctl+0x730/0x800
    [<ffffffff814db508>] inet_ioctl+0x88/0xa0
    [<ffffffff814541f0>] sock_do_ioctl+0x30/0x70
    [<ffffffff814542a9>] sock_ioctl+0x79/0x2f0
    [<ffffffff81188798>] do_vfs_ioctl+0x98/0x570
    [<ffffffff81188d01>] sys_ioctl+0x91/0xa0
    [<ffffffff8157a142>] system_call_fastpath+0x16/0x1b

  -> (_xmit_ETHER){+.....} ops: 6 {
     HARDIRQ-ON-W at:
                                          [<ffffffff8109ad86>] __lock_acquire+0x7f6/0x1e10
                                          [<ffffffff8109ca4d>] lock_acquire+0x9d/0x130
                                          [<ffffffff8157124b>] _raw_spin_lock_bh+0x3b/0x70
                                          [<ffffffff81475618>] __dev_mc_add+0x38/0x90
                                          [<ffffffff814756a0>] dev_mc_add+0x10/0x20
                                          [<ffffffff81532c9e>] igmp6_group_added+0x10e/0x1b0
                                          [<ffffffff81533f2d>] ipv6_dev_mc_inc+0x2cd/0x430
                                          [<ffffffff81515e17>] ipv6_add_dev+0x357/0x450
                                          [<ffffffff81519f27>] addrconf_notify+0x2f7/0xb10
                                          [<ffffffff81575c1c>] notifier_call_chain+0x8c/0xc0
                                          [<ffffffff81089586>] raw_notifier_call_chain+0x16/0x20
                                          [<ffffffff814689b7>] call_netdevice_notifiers+0x37/0x70
                                          [<ffffffff8146a944>] register_netdevice+0x244/0x2d0
                                          [<ffffffff8146aa0f>] register_netdev+0x3f/0x60
                                          [<ffffffffa001419b>] vmxnet3_probe_device+0x760/0x15c5 [vmxnet3]
                                          [<ffffffff812df67f>] local_pci_probe+0x5f/0xd0
                                          [<ffffffff812dfde9>] pci_device_probe+0x119/0x120
                                          [<ffffffff81373df6>] driver_probe_device+0x96/0x1c0
                                          [<ffffffff81373fcb>] __driver_attach+0xab/0xb0
                                          [<ffffffff81372a1e>] bus_for_each_dev+0x5e/0x90
                                          [<ffffffff81373a2e>] driver_attach+0x1e/0x20
                                          [<ffffffff813735b8>] bus_add_driver+0xc8/0x290
                                          [<ffffffff813745b6>] driver_register+0x76/0x140
                                          [<ffffffff812e0046>] __pci_register_driver+0x66/0xe0
                                          [<ffffffffa001b03a>] serio_raw_poll+0x3a/0x60 [serio_raw]
                                          [<ffffffff81002165>] do_one_initcall+0x45/0x190
                                          [<ffffffff810aa76b>] sys_init_module+0xfb/0x250
                                          [<ffffffff8157a142>] system_call_fastpath+0x16/0x1b
     INITIAL USE at:
                                         [<ffffffff8109a9e9>] __lock_acquire+0x459/0x1e10
                                         [<ffffffff8109ca4d>] lock_acquire+0x9d/0x130
                                         [<ffffffff8157124b>] _raw_spin_lock_bh+0x3b/0x70
                                         [<ffffffff81475618>] __dev_mc_add+0x38/0x90
                                         [<ffffffff814756a0>] dev_mc_add+0x10/0x20
                                         [<ffffffff81532c9e>] igmp6_group_added+0x10e/0x1b0
                                         [<ffffffff81533f2d>] ipv6_dev_mc_inc+0x2cd/0x430
                                         [<ffffffff81515e17>] ipv6_add_dev+0x357/0x450
                                         [<ffffffff81519f27>] addrconf_notify+0x2f7/0xb10
                                         [<ffffffff81575c1c>] notifier_call_chain+0x8c/0xc0
                                         [<ffffffff81089586>] raw_notifier_call_chain+0x16/0x20
                                         [<ffffffff814689b7>] call_netdevice_notifiers+0x37/0x70
                                         [<ffffffff8146a944>] register_netdevice+0x244/0x2d0
                                         [<ffffffff8146aa0f>] register_netdev+0x3f/0x60
                                         [<ffffffffa001419b>] vmxnet3_probe_device+0x760/0x15c5 [vmxnet3]
                                         [<ffffffff812df67f>] local_pci_probe+0x5f/0xd0
                                         [<ffffffff812dfde9>] pci_device_probe+0x119/0x120
                                         [<ffffffff81373df6>] driver_probe_device+0x96/0x1c0
                                         [<ffffffff81373fcb>] __driver_attach+0xab/0xb0
                                         [<ffffffff81372a1e>] bus_for_each_dev+0x5e/0x90
                                         [<ffffffff81373a2e>] driver_attach+0x1e/0x20
                                         [<ffffffff813735b8>] bus_add_driver+0xc8/0x290
                                         [<ffffffff813745b6>] driver_register+0x76/0x140
                                         [<ffffffff812e0046>] __pci_register_driver+0x66/0xe0
                                         [<ffffffffa001b03a>] serio_raw_poll+0x3a/0x60 [serio_raw]
                                         [<ffffffff81002165>] do_one_initcall+0x45/0x190
                                         [<ffffffff810aa76b>] sys_init_module+0xfb/0x250
                                         [<ffffffff8157a142>] system_call_fastpath+0x16/0x1b
   }
   ... key      at: [<ffffffff827fd868>] netdev_addr_lock_key+0x8/0x1e0
   ... acquired at:
    [<ffffffff8109ca4d>] lock_acquire+0x9d/0x130
    [<ffffffff8157124b>] _raw_spin_lock_bh+0x3b/0x70
    [<ffffffff81475618>] __dev_mc_add+0x38/0x90
    [<ffffffff814756a0>] dev_mc_add+0x10/0x20
    [<ffffffff81532c9e>] igmp6_group_added+0x10e/0x1b0
    [<ffffffff81533f2d>] ipv6_dev_mc_inc+0x2cd/0x430
    [<ffffffff81515e17>] ipv6_add_dev+0x357/0x450
    [<ffffffff81519f27>] addrconf_notify+0x2f7/0xb10
    [<ffffffff81575c1c>] notifier_call_chain+0x8c/0xc0
    [<ffffffff81089586>] raw_notifier_call_chain+0x16/0x20
    [<ffffffff814689b7>] call_netdevice_notifiers+0x37/0x70
    [<ffffffff8146a944>] register_netdevice+0x244/0x2d0
    [<ffffffff8146aa0f>] register_netdev+0x3f/0x60
    [<ffffffffa001419b>] vmxnet3_probe_device+0x760/0x15c5 [vmxnet3]
    [<ffffffff812df67f>] local_pci_probe+0x5f/0xd0
    [<ffffffff812dfde9>] pci_device_probe+0x119/0x120
    [<ffffffff81373df6>] driver_probe_device+0x96/0x1c0
    [<ffffffff81373fcb>] __driver_attach+0xab/0xb0
    [<ffffffff81372a1e>] bus_for_each_dev+0x5e/0x90
    [<ffffffff81373a2e>] driver_attach+0x1e/0x20
    [<ffffffff813735b8>] bus_add_driver+0xc8/0x290
    [<ffffffff813745b6>] driver_register+0x76/0x140
    [<ffffffff812e0046>] __pci_register_driver+0x66/0xe0
    [<ffffffffa001b03a>] serio_raw_poll+0x3a/0x60 [serio_raw]
    [<ffffffff81002165>] do_one_initcall+0x45/0x190
    [<ffffffff810aa76b>] sys_init_module+0xfb/0x250
    [<ffffffff8157a142>] system_call_fastpath+0x16/0x1b

 -> (&(&mc->mca_lock)->rlock){+.-...} ops: 6 {
    HARDIRQ-ON-W at:
                                        [<ffffffff8109ad86>] __lock_acquire+0x7f6/0x1e10
                                        [<ffffffff8109ca4d>] lock_acquire+0x9d/0x130
                                        [<ffffffff8157124b>] _raw_spin_lock_bh+0x3b/0x70
                                        [<ffffffff81532bd5>] igmp6_group_added+0x45/0x1b0
                                        [<ffffffff81533f2d>] ipv6_dev_mc_inc+0x2cd/0x430
                                        [<ffffffff81515e17>] ipv6_add_dev+0x357/0x450
                                        [<ffffffff81ce0d16>] addrconf_init+0x4e/0x183
                                        [<ffffffff81ce0ba1>] inet6_init+0x191/0x2a6
                                        [<ffffffff81002165>] do_one_initcall+0x45/0x190
                                        [<ffffffff81ca4d3f>] kernel_init+0xe3/0x168
                                        [<ffffffff8157b2e4>] kernel_thread_helper+0x4/0x10
    IN-SOFTIRQ-W at:
                                        [<ffffffff8109ad5e>] __lock_acquire+0x7ce/0x1e10
                                        [<ffffffff8109ca4d>] lock_acquire+0x9d/0x130
                                        [<ffffffff8157124b>] _raw_spin_lock_bh+0x3b/0x70
                                        [<ffffffff81531e9f>] mld_ifc_timer_expire+0xff/0x280
                                        [<ffffffff8106f2a9>] run_timer_softirq+0x179/0x3f0
                                        [<ffffffff810666d0>] __do_softirq+0xc0/0x210
                                        [<ffffffff8157b3dc>] call_softirq+0x1c/0x30
                                        [<ffffffff8100d42d>] do_softirq+0xad/0xe0
                                        [<ffffffff81066afe>] irq_exit+0x9e/0xb0
                                        [<ffffffff8157bd40>] smp_apic_timer_interrupt+0x70/0x9b
                                        [<ffffffff8157ab93>] apic_timer_interrupt+0x13/0x20
                                        [<ffffffff8149d857>] rt_do_flush+0x87/0x2a0
                                        [<ffffffff814a16b6>] rt_cache_flush+0x46/0x60
                                        [<ffffffff814e36e0>] fib_disable_ip+0x40/0x60
                                        [<ffffffff814e5447>] fib_inetaddr_event+0xd7/0xe0
                                        [<ffffffff81575c1c>] notifier_call_chain+0x8c/0xc0
                                        [<ffffffff810896e8>] __blocking_notifier_call_chain+0x78/0xb0
                                        [<ffffffff81089736>] blocking_notifier_call_chain+0x16/0x20
                                        [<ffffffff814d8021>] __inet_del_ifa+0xf1/0x2e0
                                        [<ffffffff814d8223>] inet_del_ifa+0x13/0x20
                                        [<ffffffff814da731>] devinet_ioctl+0x501/0x800
                                        [<ffffffff814db508>] inet_ioctl+0x88/0xa0
                                        [<ffffffff814541f0>] sock_do_ioctl+0x30/0x70
                                        [<ffffffff814542a9>] sock_ioctl+0x79/0x2f0
                                        [<ffffffff81188798>] do_vfs_ioctl+0x98/0x570
                                        [<ffffffff81188d01>] sys_ioctl+0x91/0xa0
                                        [<ffffffff8157a142>] system_call_fastpath+0x16/0x1b
    INITIAL USE at:
                                       [<ffffffff8109a9e9>] __lock_acquire+0x459/0x1e10
                                       [<ffffffff8109ca4d>] lock_acquire+0x9d/0x130
                                       [<ffffffff8157124b>] _raw_spin_lock_bh+0x3b/0x70
                                       [<ffffffff81532bd5>] igmp6_group_added+0x45/0x1b0
                                       [<ffffffff81533f2d>] ipv6_dev_mc_inc+0x2cd/0x430
                                       [<ffffffff81515e17>] ipv6_add_dev+0x357/0x450
                                       [<ffffffff81ce0d16>] addrconf_init+0x4e/0x183
                                       [<ffffffff81ce0ba1>] inet6_init+0x191/0x2a6
                                       [<ffffffff81002165>] do_one_initcall+0x45/0x190
                                       [<ffffffff81ca4d3f>] kernel_init+0xe3/0x168
                                       [<ffffffff8157b2e4>] kernel_thread_helper+0x4/0x10
  }
  ... key      at: [<ffffffff82801be2>] __key.40877+0x0/0x8
  ... acquired at:
    [<ffffffff810997bc>] check_usage_forwards+0x9c/0x110
    [<ffffffff8109a32c>] mark_lock+0x19c/0x400
    [<ffffffff8109ad5e>] __lock_acquire+0x7ce/0x1e10
    [<ffffffff8109ca4d>] lock_acquire+0x9d/0x130
    [<ffffffff8157124b>] _raw_spin_lock_bh+0x3b/0x70
    [<ffffffff81531e9f>] mld_ifc_timer_expire+0xff/0x280
    [<ffffffff8106f2a9>] run_timer_softirq+0x179/0x3f0
    [<ffffffff810666d0>] __do_softirq+0xc0/0x210
    [<ffffffff8157b3dc>] call_softirq+0x1c/0x30
    [<ffffffff8100d42d>] do_softirq+0xad/0xe0
    [<ffffffff81066afe>] irq_exit+0x9e/0xb0
    [<ffffffff8157bd40>] smp_apic_timer_interrupt+0x70/0x9b
    [<ffffffff8157ab93>] apic_timer_interrupt+0x13/0x20
    [<ffffffff8149d857>] rt_do_flush+0x87/0x2a0
    [<ffffffff814a16b6>] rt_cache_flush+0x46/0x60
    [<ffffffff814e36e0>] fib_disable_ip+0x40/0x60
    [<ffffffff814e5447>] fib_inetaddr_event+0xd7/0xe0
    [<ffffffff81575c1c>] notifier_call_chain+0x8c/0xc0
    [<ffffffff810896e8>] __blocking_notifier_call_chain+0x78/0xb0
    [<ffffffff81089736>] blocking_notifier_call_chain+0x16/0x20
    [<ffffffff814d8021>] __inet_del_ifa+0xf1/0x2e0
    [<ffffffff814d8223>] inet_del_ifa+0x13/0x20
    [<ffffffff814da731>] devinet_ioctl+0x501/0x800
    [<ffffffff814db508>] inet_ioctl+0x88/0xa0
    [<ffffffff814541f0>] sock_do_ioctl+0x30/0x70
    [<ffffffff814542a9>] sock_ioctl+0x79/0x2f0
    [<ffffffff81188798>] do_vfs_ioctl+0x98/0x570
    [<ffffffff81188d01>] sys_ioctl+0x91/0xa0
    [<ffffffff8157a142>] system_call_fastpath+0x16/0x1b

 stack backtrace:
 Pid: 567, comm: ifconfig Not tainted 2.6.39-rc6+ #1
 Call Trace:
  <IRQ>  [<ffffffff810996f6>] print_irq_inversion_bug+0x146/0x170
  [<ffffffff81099720>] ? print_irq_inversion_bug+0x170/0x170
  [<ffffffff810997bc>] check_usage_forwards+0x9c/0x110
  [<ffffffff8109a32c>] mark_lock+0x19c/0x400
  [<ffffffff8109ad5e>] __lock_acquire+0x7ce/0x1e10
  [<ffffffff8109a383>] ? mark_lock+0x1f3/0x400
  [<ffffffff8109b497>] ? __lock_acquire+0xf07/0x1e10
  [<ffffffff81012255>] ? native_sched_clock+0x15/0x70
  [<ffffffff8109ca4d>] lock_acquire+0x9d/0x130
  [<ffffffff81531e9f>] ? mld_ifc_timer_expire+0xff/0x280
  [<ffffffff8109759d>] ? lock_release_holdtime+0x3d/0x1a0
  [<ffffffff8157124b>] _raw_spin_lock_bh+0x3b/0x70
  [<ffffffff81531e9f>] ? mld_ifc_timer_expire+0xff/0x280
  [<ffffffff8157170b>] ? _raw_spin_unlock+0x2b/0x40
  [<ffffffff81531e9f>] mld_ifc_timer_expire+0xff/0x280
  [<ffffffff8106f2a9>] run_timer_softirq+0x179/0x3f0
  [<ffffffff8106f21b>] ? run_timer_softirq+0xeb/0x3f0
  [<ffffffff810122b9>] ? sched_clock+0x9/0x10
  [<ffffffff81531da0>] ? mld_gq_timer_expire+0x30/0x30
  [<ffffffff810666d0>] __do_softirq+0xc0/0x210
  [<ffffffff8109455f>] ? tick_program_event+0x1f/0x30
  [<ffffffff8157b3dc>] call_softirq+0x1c/0x30
  [<ffffffff8100d42d>] do_softirq+0xad/0xe0
  [<ffffffff81066afe>] irq_exit+0x9e/0xb0
  [<ffffffff8157bd40>] smp_apic_timer_interrupt+0x70/0x9b
  [<ffffffff8157ab93>] apic_timer_interrupt+0x13/0x20
  <EOI>  [<ffffffff81571f14>] ? retint_restore_args+0x13/0x13
  [<ffffffff810974a7>] ? lock_is_held+0x17/0xd0
  [<ffffffff8149d857>] rt_do_flush+0x87/0x2a0
  [<ffffffff814a16b6>] rt_cache_flush+0x46/0x60
  [<ffffffff814e36e0>] fib_disable_ip+0x40/0x60
  [<ffffffff814e5447>] fib_inetaddr_event+0xd7/0xe0
  [<ffffffff81575c1c>] notifier_call_chain+0x8c/0xc0
  [<ffffffff810896e8>] __blocking_notifier_call_chain+0x78/0xb0
  [<ffffffff81089736>] blocking_notifier_call_chain+0x16/0x20
  [<ffffffff814d8021>] __inet_del_ifa+0xf1/0x2e0
  [<ffffffff814d8223>] inet_del_ifa+0x13/0x20
  [<ffffffff814da731>] devinet_ioctl+0x501/0x800
  [<ffffffff8108a3af>] ? local_clock+0x6f/0x80
  [<ffffffff81575898>] ? do_page_fault+0x268/0x560
  [<ffffffff814db508>] inet_ioctl+0x88/0xa0
  [<ffffffff814541f0>] sock_do_ioctl+0x30/0x70
  [<ffffffff814542a9>] sock_ioctl+0x79/0x2f0
  [<ffffffff810dfe87>] ? __call_rcu+0xa7/0x190
  [<ffffffff81188798>] do_vfs_ioctl+0x98/0x570
  [<ffffffff8117737e>] ? fget_light+0x33e/0x430
  [<ffffffff81571ef9>] ? retint_swapgs+0x13/0x1b
  [<ffffffff81188d01>] sys_ioctl+0x91/0xa0
  [<ffffffff8157a142>] system_call_fastpath+0x16/0x1b
Signed-off-by: NRoland Dreier <roland@purestorage.com>
Signed-off-by: NShreyas N Bhatewara <sbhatewara@vmware.com>
Signed-off-by: NScott J. Goldman <scottjg@vmware.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fixes generated by 'codespell' and manually reviewed.
Signed-off-by: NLucas De Marchi <lucas.demarchi@profusion.mobi>

In case of single tx and rx queues, three MSI-x vectors are allocated instead
of two. This patch fixes that.
Signed-off-by: NShreyas N Bhatewara <sbhatewara@vmware.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Access to cmd register is racey, especially in smp environments. Protect
it using a spinlock.
Signed-off-by: NMatthieu Bucchianeri <matthieu@vmware.com>
Signed-off-by: NShreyas N Bhatewara <sbhatewara@vmware.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

There is a small possibility of a race where the suspend routine gets
called, while a napi callback is still pending and when that comes up,
it enables interrupts which just got disabled in the suspend routine.
This change adds napi disable call in suspend and enable in resume to
avoid race.
Signed-off-by: NShreyas N Bhatewara <sbhatewara@vmware.com>
Acked-by: NDmitry Torokhov <dtor@vmware.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This is a performance enhancement fix. vmxnet3 device performs better when
provided with at least 54 bytes (ethernet 14 + IP 20+ TCP 20) in the first SG
buffer. For UDP packets driver provides lesser than that in first sg. This
change fixes the same. Also avoid the redundant pskb_may_pull() call.
Signed-off-by: NShreyas N Bhatewara <sbhatewara@vmware.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Make hw vlan tag stripping as enabled by default. Thereby remove
the code to conditionally enable it later.
Signed-off-by: NGuolin Yang <gyang@vmware.com>
Signed-off-by: NShreyas N Bhatewara <sbhatewara@vmware.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

While activating the device get it's MAC address from netdev. This will allow
the MAC address configured using ifconfig to persist through the reset.
Signed-off-by: NShreyas N Bhatewara <sbhatewara@vmware.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fix a bug while changing ring size when MTU is changed.
Signed-off-by: NShreyas N Bhatewara <sbhatewara@vmware.com>
Acked-by: NDmitry Torokhov <dtor@vmware.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Using static const generally increases object text and decreases data size.
It also generally decreases overall object size.
Signed-off-by: NJoe Perches <joe@perches.com>

There were several paths that didn't release their locks.
Signed-off-by: NDan Carpenter <error27@gmail.com>
Signed-off-by: NBhavesh Davda <bhavesh@vmware.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Some drivers are using skb_transport_offset(skb) instead of skb->csum_start
for NETIF_F_HW_CSUM offload.  This does not matter now, but if someone
implements checksumming of encapsulated packets then this will break silently.

TSO output paths are left as they are, since they are for IP+TCP only
(might be worth converting though).
Signed-off-by: NMichał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

flush_scheduled_work() is on its way out.  This patch contains simple
conversions to replace flush_scheduled_work() usage with direct
cancels and flushes.

Directly cancel the used works on driver detach and flush them in
other cases.

The conversions are mostly straight forward and the only dangers are,

* Forgetting to cancel/flush one or more used works.

* Cancelling when a work should be flushed (ie. the work must be
  executed once scheduled whether the driver is detaching or not).

I've gone over the changes multiple times but it would be much
appreciated if you can review with the above points in mind.
Signed-off-by: NTejun Heo <tj@kernel.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jay Cliburn <jcliburn@gmail.com>
Cc: Michael Chan <mchan@broadcom.com>
Cc: Divy Le Ray <divy@chelsio.com>
Cc: e1000-devel@lists.sourceforge.net
Cc: Vasanthy Kolluri <vkolluri@cisco.com>
Cc: Samuel Ortiz <samuel@sortiz.org>
Cc: Lennert Buytenhek <buytenh@wantstofly.org>
Cc: Andrew Gallatin <gallatin@myri.com>
Cc: Francois Romieu <romieu@fr.zoreil.com>
Cc: Ramkrishna Vepa <ramkrishna.vepa@exar.com>
Cc: Matt Carlson <mcarlson@broadcom.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Shreyas Bhatewara <sbhatewara@vmware.com>
Cc: netdev@vger.kernel.org

Add multiqueue support to vmxnet3 driver

This change adds multiqueue and thus receive side scaling support
to vmxnet3 device driver. Number of rx queues is limited to 1 in cases
where MSI is not configured or one MSIx vector is not available per rx
queue
Signed-off-by: NShreyas Bhatewara <sbhatewara@vmware.com>
Reviewed-by: NBhavesh Davda <bhavesh@vmware.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Noticed by sparse:
drivers/net/vmxnet3/vmxnet3_drv.c:876:38: warning: cast from restricted __be16
drivers/net/vmxnet3/vmxnet3_drv.c:876:38: warning: cast from restricted __be16
drivers/net/vmxnet3/vmxnet3_drv.c:876:24: warning: restricted __be16 degrades to integer
Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

It's a le64, not a le32, typo in one place only.

Noticed by sparse:
drivers/net/vmxnet3/vmxnet3_drv.c:2668:52: warning: incorrect type in assignment (different base types)
drivers/net/vmxnet3/vmxnet3_drv.c:2668:52:    expected restricted __le64 [usertype] confPA
drivers/net/vmxnet3/vmxnet3_drv.c:2668:52:    got restricted __le32 [usertype] <noident>
Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: NShreyas Bhatewara <sbhatewara@vmware.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

It's easier to just annotate the constants as little endian types and set/clear
the flags directly.
Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: NShreyas Bhatewara <sbhatewara@vmware.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Gcc doesn't usually handle inline across compilation units, and the
functions don't have to be global in scope. Move the set/reset flag
functions int the existing vmxnet3 header.
Signed-off-by: NStephen Hemminger <shemminger@vyatta.com>
Acked-by: NShreyas Bhatewara <sbhatewara@vmware.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

VLAN_GROUP_ARRAY_LEN is simply the number of possible vlan VIDs.
Since vlan groups will soon be more of an implementation detail
for vlan devices, rename the constant to be descriptive of its
actual purpose.
Signed-off-by: NJesse Gross <jesse@nicira.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

fresh skbs have ip_summed set to CHECKSUM_NONE (0)

We can avoid setting again skb->ip_summed to CHECKSUM_NONE in drivers.

Introduce skb_checksum_none_assert() helper so that we keep this
assertion documented in driver sources.

Change most occurrences of :

skb->ip_summed = CHECKSUM_NONE;

by :

skb_checksum_none_assert(skb);
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fix an overflow bug in vmxnet3 Tx descriptor

This patch fixes a bug where a 16K buffer on a Tx descriptor was overflowing
into the 'gen' bit in the descriptor thereby corrupting the descriptor and
stalling the transmit ring.
Signed-off-by: NBhavesh Davda <bhavesh@vmware.com>
Signed-off-by: NShreyas Bhatewara <sbhatewara@vmware.com>
Signed-off-by: NMatthew Delco <delcoM@vmware.com>
Signed-off-by: NRonghua Zhang <ronghua@vmware.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Respect the interrupt type set in VM configuration.

When interrupt type is not auto, do not ignore the interrupt type set from
VM configuration.
Signed-off-by: NShreyas Bhatewara <sbhatewara@vmware.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Hold rtnl_lock to get the right link state.

While asynchronously resetting the device, hold rtnl_lock to get the
right value from netif_running. If a reset is scheduled, and the device
goes thru close and open, it may happen that reset and open may run in
parallel. Holding rtnl_lock will avoid this.
Signed-off-by: NShreyas Bhatewara <sbhatewara@vmware.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This change initializes the state of link at the time when driver is
loaded. The ethtool output for 'link detected' and 'link speed'
is thus valid even before the interface is brought up.
Signed-off-by: NShreyas Bhatewara <sbhatewara@vmware.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

A new bit map 'intrCtrl' is introduced in the DriverShared area. The 
driver should update VMXNET3_IC_DISABLE_ALL bit before writing IMR.
Signed-off-by: NRonghua Zang <ronghua@vmware.com>
Signed-off-by: NShreyas Bhatewara <sbhatewara@vmware.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Use kzalloc rather than the combination of kmalloc and memset.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression x,size,flags;
statement S;
@@

-x = kmalloc(size,flags);
+x = kzalloc(size,flags);
 if (x == NULL) S
-memset(x, 0, size);
// </smpl>
Signed-off-by: NJulia Lawall <julia@diku.dk>
Signed-off-by: NBhavesh Davda <bhavesh@vmware.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Now that core network takes care of trans_start updates, dont do it
in drivers themselves, if possible. Drivers can avoid one cache miss
(on dev->trans_start) in their start_xmit() handler.

Exceptions are NETIF_F_LLTX drivers
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Network drivers do not have to update last_rx, unless they need it for
their private use.
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Converts the list and the core manipulating with it to be the same as uc_list.

+uses two functions for adding/removing mc address (normal and "global"
 variant) instead of a function parameter.
+removes dev_mcast.c completely.
+exposes netdev_hw_addr_list_* macros along with __hw_addr_* functions for
 manipulation with lists on a sandbox (used in bonding and 80211 drivers)
Signed-off-by: NJiri Pirko <jpirko@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NJiri Pirko <jpirko@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch replaces dev->mc_count in all drivers (hopefully I didn't miss
anything). Used spatch and did small tweaks and conding style changes when
it was suitable.

Jirka
Signed-off-by: NJiri Pirko <jpirko@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Use DEFINE_PCI_DEVICE_TABLE() so we get place PCI ids table into correct section
in every case.
Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Only files where David Miller is the primary git-signer.
wireless, wimax, ixgbe, etc are not modified.

Compile tested x86 allyesconfig only
Not all files compiled (not x86 compatible)

Added a few > 80 column lines, which I ignored.
Existing checkpatch complaints ignored.
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch removes config dependency on x86 to build vmxnet3 driver. Thus
the driver can be built on big endian architectures now. Although vmxnet3
is not supported on VMs other than x86 architecture, all this code goes in
to ensure correctness. If the code is not dependent on x86, it should not
assume little endian architecture in any of its operations.
Signed-off-by: NShreyas Bhatewara <sbhatewara@vmware.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

vmxnet3 was using dprintk() for debugging output.  This was
defined in <linux/dst.h> and was the only thing that was
used from that header file.  This caused compile errors
when CONFIG_BLOCK was not enabled due to bio* and BIO*
uses in the header file, so change this driver to use
dev_dbg() for debugging output.

include/linux/dst.h:520: error: dereferencing pointer to incomplete type
include/linux/dst.h:520: error: 'BIO_POOL_BITS' undeclared (first use in this function)
include/linux/dst.h:521: error: dereferencing pointer to incomplete type
include/linux/dst.h:522: error: dereferencing pointer to incomplete type
include/linux/dst.h:525: error: dereferencing pointer to incomplete type
make[4]: *** [drivers/net/vmxnet3/vmxnet3_drv.o] Error 1
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NBhavesh Davda <bhavesh@vmware.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

vmxnet3 uses in_dev* interfaces so it should depend on INET.
Also fix so that the driver builds when CONFIG_PCI_MSI is disabled.

vmxnet3_drv.c:(.text+0x2a88cb): undefined reference to `in_dev_finish_destroy'

drivers/net/vmxnet3/vmxnet3_drv.c:1335: error: 'struct vmxnet3_intr' has no member named 'msix_entries'
drivers/net/vmxnet3/vmxnet3_drv.c:1384: error: 'struct vmxnet3_intr' has no member named 'msix_entries'
drivers/net/vmxnet3/vmxnet3_drv.c:2137: error: 'struct vmxnet3_intr' has no member named 'msix_entries'
drivers/net/vmxnet3/vmxnet3_drv.c:2138: error: 'struct vmxnet3_intr' has no member named 'msix_entries'
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NBhavesh davda <bhavesh@vmware.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Ethernet NIC driver for VMware's vmxnet3

From: Shreyas Bhatewara <sbhatewara@vmware.com>

This patch adds driver support for VMware's virtual Ethernet NIC: vmxnet3
Guests running on VMware hypervisors supporting vmxnet3 device will thus have
access to improved network functionalities and performance.
Signed-off-by: NShreyas Bhatewara <sbhatewara@vmware.com>
Signed-off-by: NBhavesh Davda <bhavesh@vmware.com>
Signed-off-by: NRonghua Zhang <ronghua@vmware.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>