BUG: soft lockup - CPU#0 stuck for 61s! [phy0:686]
Modules linked in: isofs udf crc_itu_t aes_i586 aes_generic binfmt_misc dm_crypt snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss arc4 snd_seq_midi ath9k snd_rawmidi mac80211 snd_seq_midi_event ath snd_seq cfg80211 snd_timer snd_seq_device snd pcmcia nsc_ircc soundcore yenta_socket joydev rsrc_nonstatic snd_page_alloc irda pcmcia_core ppdev thinkpad_acpi parport_pc led_class nvram crc_ccitt psmouse shpchp serio_raw lp parport dm_raid45 xor fbcon tileblit font bitblit softcursor vga16fb vgastate radeon ttm drm_kms_helper drm intel_agp video e100 mii floppy output i2c_algo_bit agpgart

Pid: 686, comm: phy0 Not tainted (2.6.32-16-generic #25-Ubuntu) 2367BU2
EIP: 0060:[<c03520f2>] EFLAGS: 00000296 CPU: 0
EIP is at ioread32+0x32/0x40
EAX: 00000000 EBX: edc00000 ECX: f8548138 EDX: f8548094
ESI: edc00000 EDI: 00011f2f EBP: ee349c40 ESP: ee349c40
 DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
CR0: 8005003b CR2: b3621000 CR3: 00871000 CR4: 000006d0
DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
DR6: ffff0ff0 DR7: 00000400
Call Trace:
 [<f8ae939b>] ath9k_ioread32+0x2b/0x80 [ath9k]
 [<f8afd02f>] ath9k_hw_update_mibstats+0x4f/0x90 [ath9k]
 [<f8afd13d>] ath9k_ani_restart+0xcd/0x150 [ath9k]
 [<f8afdf22>] ath9k_hw_procmibevent+0xf2/0x130 [ath9k]
 [<f8b03c60>] ath_isr+0x130/0x170 [ath9k]
 [<c019e094>] handle_IRQ_event+0x54/0x150
 [<c0106d77>] ? mask_and_ack_8259A+0x57/0xf0
 [<c01a05c4>] handle_level_irq+0x74/0x100
 [<c01059ed>] handle_irq+0x1d/0x30
 [<c05a212c>] do_IRQ+0x4c/0xc0
 [<f8ae939b>] ? ath9k_ioread32+0x2b/0x80 [ath9k]
 [<c0103a30>] common_interrupt+0x30/0x40
 [<c015161d>] ? __do_softirq+0x4d/0x1b0
 [<c012a2f8>] ? default_spin_lock_flags+0x8/0x10
 [<c059dcbf>] ? _spin_lock_irqsave+0x2f/0x50
 [<c0106c87>] ? enable_8259A_irq+0x47/0x70
 [<c01a0602>] ? handle_level_irq+0xb2/0x100
 [<c01517c5>] do_softirq+0x45/0x50
 [<c0151915>] irq_exit+0x65/0x70
 [<c05a2135>] do_IRQ+0x55/0xc0
 [<c0103a30>] common_interrupt+0x30/0x40
 [<c03520f2>] ? ioread32+0x32/0x40
 [<f8ae939b>] ath9k_ioread32+0x2b/0x80 [ath9k]
 [<f8aeaf6a>] ath9k_hw_set_interrupts+0x26a/0x360 [ath9k]
 [<f8b0267e>] ath_set_channel+0x17e/0x180 [ath9k]
 [<f8b03ad7>] ath9k_config+0x287/0x2e0 [ath9k]
 [<f8a5acc2>] ieee80211_hw_config+0x72/0xb0 [mac80211]
 [<f8a5e425>] ieee80211_scan_work+0x175/0x410 [mac80211]
 [<c059bc3c>] ? schedule+0x44c/0x840
 [<c0161c6e>] run_workqueue+0x8e/0x150
 [<f8a5e2b0>] ? ieee80211_scan_work+0x0/0x410 [mac80211]
 [<c0161db4>] worker_thread+0x84/0xe0
 [<c0165d30>] ? autoremove_wake_function+0x0/0x50
 [<c0161d30>] ? worker_thread+0x0/0xe0
 [<c0165aa4>] kthread+0x74/0x80
 [<c0165a30>] ? kthread+0x0/0x80
 [<c0104087>] kernel_thread_helper+0x7/0x10