Someone

irq 4: nobody cared (try booting with the "irqpoll" option)
Call Trace: [<8014337c>]  [<802086d8>]  [<80224ed4>]  [<801435cc>]  [<80142b0c>]  [<80142c4c>]  [<80103aa8>]  [<80103ab0>]  [<80128398>]  [<80101294>]  [<8010207c>]
handlers:
[<802085d0>]
Disabling IRQ #4
warning: end_irq 4 did not enable (2)
warning: end_irq 4 did not enable (6)
warning: end_irq 4 did not enable (6)
warning: end_irq 4 did not enable (6)
warning: end_irq 4 did not enable (6)
warning: end_irq 4 did not enable (6)


[<8014337c>] __report_bad_irq  
[<802086d8>] ar2313_interrupt
[<80224ed4>] kfree_skbmem
[<801435cc>] note_interrupt
[<80142b0c>] handle_IRQ_event
[<80142c4c>] __do_IRQ
[<80103aa8>] do_IRQ
[<80103ab0>] do_IRQ
[<80128398>] sys_gettimeofday
[<80101294>] end_irq
[<8010207c>] ret_from_irq