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SubjectJMicron SATA controller not available - bisected
With current git the SATA DVD writer on my system is no longer detected, 
and these errors show up:

pci 0000:05:00.0: BAR 2: can't allocate resource
pci 0000:05:00.0: BAR 3: can't allocate resource
ahci 0000:05:00.0: device not available because of BAR 2 [0x00-0x07]
collisions
.. where 05:00.0 is this SATA controller where the DVD is plugged in:

05:00.0 SATA controller: JMicron Technologies, Inc. 20360/20363 Serial
ATA Controller (rev 03)

This is an ICH10-based board that has the JMicron controller in addition
to the onboard SATA. The drive works fine if plugged into one of the
onboard ports, and also works fine with kernel 2.6.29 on the JMicron
controller.

I bisected the problem down to this commit:
480b93b7837fb3cf0579a42f4953ac463a5b9e1e: PCI: centralize device setup code

Note that this worked with recent 2.6.30-rc kernels until I had to reset
the board's CMOS, so a change in a BIOS setting was probably a trigger.

Marc



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