Re: PCMCIA eject while sleeping issues

• Subject: Re: PCMCIA eject while sleeping issues
• From: Rick Sulack <email@hidden>
• Date: Tue, 25 Feb 2003 13:49:26 -0800

I've gotten a little further with this race condition.

Here's some interesting log entries:

Feb 21 13:45:00 mtr-powerbook mach_kernel: System Sleep
Feb 21 13:45:00 mtr-powerbook mach_kernel: System Wake
Feb 21 13:45:00 mtr-powerbook mach_kernel: Wake event 0001
Feb 21 13:45:00 mtr-powerbook mach_kernel: enableClockSpreading returned with 0
Feb 21 13:45:00 mtr-powerbook mach_kernel: AppleNMI unmask NMI
Feb 21 13:45:00 mtr-powerbook mach_kernel: net_russotto_AtmelWirelessDriver::me\
ssage, nub=0x1f9f500, card services event CS_EVENT_CARD_REMOVAL.
Feb 21 13:45:00 mtr-powerbook mach_kernel: IOPCCard: shutting down socket 0.
Feb 21 13:45:00 mtr-powerbook mach_kernel: IOPCCard: calling terminate on socke\
t 0 function 0 nub 0x1f9f500.
Feb 21 13:45:00 mtr-powerbook mach_kernel: net_russotto_AtmelWirelessDriver::st\
op(provider=0x1f9f500, this=0x5810000) stopping
Feb 21 13:45:00 mtr-powerbook mach_kernel: net_russotto_AtmelWirelessDriver: un\
mapping window index 0, size = 0x20
Feb 21 13:45:00 mtr-powerbook mach_kernel: IOPCCard notice: PCCardExpert0: Rele\
aseConfiguration: Bad handle
Feb 21 13:45:00 mtr-powerbook mach_kernel: IOPCCard16Device: releasing socket 0\
function 0 from card services.
Feb 21 13:45:00 mtr-powerbook mach_kernel: IOPCCard: socket 0 did not terminate\
cleanly, state = 0x4.

This occurs when I eject the card while the system is asleep. What appears to happen is the Card Services ReleaseConfiguration is called when the system sleeps. When the system wakes back up, it notices the card gone and calls PCCardBridge::unconfigureSocket. This calls ReleaseConfiguration again, but that returns an error because the socket isn't configured. The error prevents the socket state from being set to unconfigured, which causes a problem if the card is re-inserted quickly. (It doesn't happen if I wait a while, so I assume card services eventually cleans up the mess)

I still don't see how this leads to a setPowerState with 0 on the re-inserted card, but I suspect it's related.
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