On Tue, 3 Feb 2009 00:57:54 +0100
Norbert Preining <preining@xxxxxxxx> wrote:
>
> Ok, here are my test. I was wrong in the previous email. The card does
> not have to be in the slot:
>
> Tests, all with kernel 2.6.29-rc3
>
> - normal boot without card in the slot -> not detected
> . suspending with OR without card in the slot makes it work!!!!
> (that is new, I thought that the card has to be in the slot!)
> . re-ejecting and re-inserting always make the card show up
> One sequence of eject/re-insert's syslog output is attached.
>
> - normal boot WITH card in the slot -> detected!!!
>
> All tests were made with and without ricoh_mmc built into the kernel. It
> does not change anything, so ricoh_mmc does not do anything at all here,
> can be disabled.
>
This is extremely odd. I'd normally guess that this is because of a
race with ricoh_mmc, but since you've removed that from the equation...
> Hmm, isn't there a way to read the pci settings and see the difference?
> Could it make *the* difference?
Most likely. You can dump the PCI config using lspci -xxx. Compare the
data for everything on the Ricoh device (not just the MMC interface)
and see if you can see a difference before and after suspend.
Rgds
--
-- Pierre Ossman
Linux kernel, MMC maintainer http://www.kernel.org
rdesktop, core developer http://www.rdesktop.org
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