Bug 4675

Distribution: Slackware 10.1
Hardware Environment: Latitude LS H400 Notebook with Netgear WG511T (Atheros
chipset) network card
Software Environment: ACPI enabled, APM off, Yenta-socket cardbus handler
(standard from 2.6.11.10), MADWiFi card drivers 
Problem Description:
Receive message "Disabling IRQ #9" on PCMCIA startup, wireless network card then
fails to detect any networks or connect at all. 

Steps to reproduce:
Happens 2/3 of the time when the PC boots. Happens right when the PCMCIA
services are being enabled, producing the following message:
[begin snip]
May 25 16:18:04 Arya kernel: ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 9
May 25 16:18:04 Arya kernel: PCI: setting IRQ 9 as level-triggered
May 25 16:18:06 Arya kernel: irq 9: nobody cared!
May 25 16:18:06 Arya kernel:  [<c014789a>] __report_bad_irq+0x2a/0xa0
May 25 16:18:06 Arya kernel:  [<c01471c0>] handle_IRQ_event+0x30/0x70
May 25 16:18:06 Arya kernel:  [<c01479a0>] note_interrupt+0x70/0xb0
May 25 16:18:06 Arya kernel:  [<c0147345>] __do_IRQ+0x145/0x160
May 25 16:18:06 Arya kernel:  [<c0104de7>] do_IRQ+0x47/0x70
May 25 16:18:06 Arya kernel:  =======================
May 25 16:18:06 Arya kernel:  [<c010333e>] common_interrupt+0x1a/0x20
May 25 16:18:06 Arya kernel:  [<c01208ce>] __do_softirq+0x2e/0x90
May 25 16:18:06 Arya kernel:  [<c0104ef1>] do_softirq+0x41/0x50
May 25 16:18:06 Arya kernel:  =======================
May 25 16:18:06 Arya kernel:  [<c01209f5>] irq_exit+0x35/0x40
May 25 16:18:06 Arya kernel:  [<c0104dee>] do_IRQ+0x4e/0x70
May 25 16:18:06 Arya kernel:  [<c010333e>] common_interrupt+0x1a/0x20
May 25 16:18:06 Arya kernel:  [<c0157fa5>] do_wp_page+0xd5/0x340
May 25 16:18:06 Arya kernel:  [<c01591e9>] handle_mm_fault+0x169/0x1a0
May 25 16:18:06 Arya kernel:  [<c0112e4c>] do_page_fault+0x19c/0x5d5
May 25 16:18:06 Arya kernel:  [<c0117190>] deactivate_task+0x20/0x30
May 25 16:18:06 Arya kernel:  [<c011d9d5>] exit_notify+0x385/0x8a0
May 25 16:18:06 Arya kernel:  [<c0167f79>] filp_close+0x59/0x90
May 25 16:18:06 Arya kernel:  [<c016801b>] sys_close+0x6b/0xa0
May 25 16:18:06 Arya kernel:  [<c0112cb0>] do_page_fault+0x0/0x5d5
May 25 16:18:06 Arya kernel:  [<c01033e3>] error_code+0x2b/0x30
May 25 16:18:06 Arya kernel: handlers:
May 25 16:18:06 Arya kernel: [<c029dbcb>] (acpi_irq+0x0/0x16)
May 25 16:18:06 Arya kernel: [<d09d98a0>] (yenta_interrupt+0x0/0x40 [yenta_socket])
May 25 16:18:06 Arya kernel: Disabling IRQ #9
May 25 16:18:07 Arya kernel: ath_hal: module license 'Proprietary' taints kernel.
May 25 16:18:07 Arya kernel: PCI: Enabling device 0000:02:00.0 (0000 -> 0002)
May 25 16:18:08 Arya kernel: ath0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
May 25 16:18:08 Arya kernel: ath0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps
9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
May 25 16:18:08 Arya kernel: ath0: mac 5.9 phy 4.3 radio 4.6
May 25 16:18:08 Arya kernel: ath0: 802.11 address: 00:09:5b:ea:80:ab
[end snip]