Recent ATA changes break Thinkpad T40p

[Søren Schmidt]

Søren Schmidt wrote:
> Oliver B. Fischer wrote:
> 
>> Brian Buchanan wrote:
>>
>>> S�ren,
>>>
>>> It looks like the changes you made to ATA IRQ handling in the last few
>>> days broke ATA support on my laptop, an IBM Thinkpad T40p.
>>>
>>> atapci0: <Intel ICH4 UDMA100 controller> port
>>> 0x1860-0x186f,0x376,0x170-0x177,0x3f6,0x1f0-0x1f7 at device 31.1 on pci0
>>>
>>> atapci0 at pci0:31:1:      class=0x01018a card=0x052d1014 chip=0x24ca8086
>>> rev=0x01 hdr=0x00
>>>     vendor   = 'Intel Corporation'
>>>     device   = '82801DBM (ICH4-M) UltraATA/100 EIDE Controller'
>>>     class    = mass storage
>>>     subclass = ATA

>> I can confirm this for my R51, which have the same controller as 
>> Brians one.
> 
> 
> This is *not* a controller problem, its because the CDROM drive has 
> buggy firmware that responds to both master and slave selection :(

OK, I have committed a workaround for those buggers to -current...

(for those that uses 5.3 just take your ATA driver upto -current)

-Søren