[PATCH] libertas: fix spinlock recursion bug

[Holger Schurig]

Hmm, that isn't the end of my spinlock problems. When I'm 
associated and ping, I get another recursion:

libertas assoc: associated to 00:13:19:80:da:30
BUG: spinlock recursion on CPU#0, lbs_main/5566
 lock: f58b58d8, .magic: dead4ead, .owner: 
lbs_main/5566, .owner_cpu: 0
Pid: 5566, comm: lbs_main Not tainted 2.6.25-rc5-wl #19
 [<c01ccdb7>] spin_bug+0x76/0xb1
 [<c01ccecb>] _raw_spin_lock+0x34/0xc9
 [<c0306984>] _spin_lock_irqsave+0x17/0x1c
 [<f8c33cdf>] lbs_hard_start_xmit+0x61/0x4e2 [libertas]
 [<c0306bef>] ? _spin_unlock+0x8/0x1f
 [<c014f497>] ? cache_alloc_refill+0x18c/0x439
 [<c02b449b>] dev_hard_start_xmit+0x16f/0x1dc
 [<c02c0f8b>] __qdisc_run+0x7a/0x14e
 [<c02b67ba>] dev_queue_xmit+0x119/0x23b
 [<c02bb187>] neigh_resolve_output+0x20a/0x236
 [<c02b978e>] neigh_update+0x2c0/0x36a
 [<c02c04e3>] ? eth_header_cache_update+0x0/0x12
 [<c02e4331>] arp_process+0x4d6/0x50e
 [<c02afc6d>] ? skb_release_data+0x84/0x89
 [<c02afb6d>] ? __kfree_skb+0x61/0x64
 [<c02e440c>] arp_rcv+0xa3/0xb3
 [<c02b4021>] netif_receive_skb+0x1f7/0x26a
 [<c02b643c>] process_backlog+0x5b/0xa5
 [<c02b5fa3>] net_rx_action+0x7f/0x142
 [<c011befe>] __do_softirq+0x38/0x70
 [<c011bf5b>] do_softirq+0x25/0x2a
 [<c02b5ea4>] netif_rx_ni+0x24/0x3e
 [<f8c33b59>] lbs_process_rxed_packet+0x755/0x7c0 [libertas]
 [<c02b024c>] ? __alloc_skb+0x4c/0xf8
 [<f88f9096>] if_cs_get_int_status+0x22a/0x3d8 [libertas_cs]
 [<f8c2ef5e>] lbs_thread+0x2fe/0x745 [libertas]
 [<c0114edd>] ? default_wake_function+0x0/0xd
 [<f8c2ec60>] ? lbs_thread+0x0/0x745 [libertas]
 [<c0126f91>] kthread+0x39/0x60
 [<c0126f58>] ? kthread+0x0/0x60
 [<c01043c3>] kernel_thread_helper+0x7/0x10
 =======================