Recent ATA changes break Thinkpad T40p

[M. Warner Losh]

In message: <4128C2BE.7080103 at DeepCore.dk>
            Søren Schmidt <sos at DeepCore.dk> writes:
: 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)

This work around appears to work for me, since my ich4 was seeing the
same problems, as I reported on IRC.

Warner