PATCH: power down acpi and pci devices in suspend/resume

[Nate Lawson]

M. Warner Losh wrote:
> In message: <419EF7AD.8050007 at root.org>
>             Nate Lawson <nate at root.org> writes:
> : cbb0: bad Vcc request. ctrl=0xffffff88, status=0xffffffff
> : cbb_power: 0V
> : cbb1: bad Vcc request. ctrl=0xffffff88, status=0xffffffff
> : cbb_power: 0V
> 
> This looks like a problem to me.
> 
> Warner

I did a suspend with dhclient active and an an0 card present and got this:

cbb0: bad Vcc request. ctrl=0xffffff88, status=0xffffffff
cbb_power: 0V
cbb1: bad Vcc request. ctrl=0xffffff88, status=0xffffffff
cbb_power: 0V
fxp0: SCB timeout: 0xff 0xff 0xff 0xffff
fxp0: SCB timeout: 0xff 0xff 0xff 0xffff
fxp0: SCB timeout: 0xff 0xff 0xff 0xffff
fxp0: DMA timeout
fxp0: SCB timeout: 0xff 0xff 0xff 0xffff
fxp0: DMA timeout
fxp0: SCB timeout: 0xff 0xff 0xff 0xffff
fxp0: DMA timeout
fxp0: SCB timeout: 0xff 0xff 0xff 0xffff
fxp0: SCB timeout: 0xff 0xff 0xff 0xffff
fxp0: SCB timeout: 0xff 0xff 0xff 0xffff
fxp0: SCB timeout: 0xff 0xff 0xff 0xffff
fxp0: SCB timeout: 0xff 0xff 0xff 0xffff
fxp0: DMA timeout
fxp0: SCB timeout: 0xff 0xff 0xff 0xffff
fxp0: DMA timeout
fxp0: SCB timeout: 0xff 0xff 0xff 0xffff
fxp0: DMA timeout
fxp0: SCB timeout: 0xff 0xff 0xff 0xffff
fxp0: SCB timeout: 0xff 0xff 0xff 0xffff

Note that the policy is to set all PCI and ACPI devices to D3 when 
suspending unless an _SxD method says to use a different power state. 
fxp0 isn't present in the ACPI namespace but both cardbus ports are and 
both have _S3D methods that say to use D3 for S3!  So this is not an 
error unless it's in cbb needing to do more before I power it down.  I 
don't get any of the above messages on suspend without my patch.

Suggestions?  What does the "bad Vcc request" message mean?

-Nate