BUG: spinlock recursion on CPU#0, swapper/0 (Tainted: P     )

 lock: c903a284, .magic: dead4ead, .owner: swapper/0, .owner_cpu: 0

 [<c01c4d69>] _raw_spin_lock+0x32/0xd3     [<c02dc5cc>] _spin_lock_irqsave+0x9/0xd

 [<ca8f7fb6>] ieee80211_beacon_update+0x2f/0x755 [wlan]     [<ca8adf4a>] ath_beacon_generate+0x2fc/0x4a7 [ath_pci]

 [<ca8b3290>] ath_intr+0x2e1/0xa07 [ath_pci]     [<c01175ef>] scheduler_tick+0x1a/0x2af

 [<c0138412>] handle_IRQ_event+0x23/0x4c     [<c01384b5>] __do_IRQ+0x7a/0xcd

 [<c0104bde>] do_IRQ+0x5c/0x77     =======================

 [<c010358e>] common_interrupt+0x1a/0x20

 [<ca8fe435>] ieee80211_free_node+0x15/0x50 [wlan]     [<ca8b2d9f>] ath_rx_tasklet+0x4b2/0x6c2 [ath_pci]

 [<c011e756>] tasklet_action+0x37/0x57     [<c011e802>] __do_softirq+0x35/0x7f

 [<c0104c31>] do_softirq+0x38/0x3f     =======================

 [<c0104bf0>] do_IRQ+0x6e/0x77

 [<c010358e>] common_interrupt+0x1a/0x20     [<c0101dec>] default_idle+0x2b/0x53

 [<c0101e4e>] cpu_idle+0x3a/0x4f     [<c03a26a3>] start_kernel+0x28c/0x28e

BUG: spinlock lockup on CPU#0, swapper/0, c903a284 (Tainted: P     )

 [<c01c4dec>] _raw_spin_lock+0xb5/0xd3     [<c02dc5cc>] _spin_lock_irqsave+0x9/0xd

 [<ca8f7fb6>] ieee80211_beacon_update+0x2f/0x755 [wlan]     [<ca8adf4a>] ath_beacon_generate+0x2fc/0x4a7 [ath_pci]

 [<ca8b3290>] ath_intr+0x2e1/0xa07 [ath_pci]     [<c01175ef>] scheduler_tick+0x1a/0x2af

 [<c0138412>] handle_IRQ_event+0x23/0x4c     [<c01384b5>] __do_IRQ+0x7a/0xcd

 [<c0104bde>] do_IRQ+0x5c/0x77     =======================

 [<c010358e>] common_interrupt+0x1a/0x20

 [<ca8fe435>] ieee80211_free_node+0x15/0x50 [wlan]     [<ca8b2d9f>] ath_rx_tasklet+0x4b2/0x6c2 [ath_pci]

 [<c011e756>] tasklet_action+0x37/0x57     [<c011e802>] __do_softirq+0x35/0x7f

 [<c0104c31>] do_softirq+0x38/0x3f     =======================

 [<c0104bf0>] do_IRQ+0x6e/0x77

 [<c010358e>] common_interrupt+0x1a/0x20     [<c0101dec>] default_idle+0x2b/0x53

 [<c0101e4e>] cpu_idle+0x3a/0x4f     [<c03a26a3>] start_kernel+0x28c/0x28e