[Bug 5061] New: unable to remove socket power

[bugme-daemon at kernel-bugs.osdl.org]

http://bugzilla.kernel.org/show_bug.cgi?id=5061

           Summary: unable to remove socket power
    Kernel Version: 2.6.13-rc6
            Status: NEW
          Severity: normal
             Owner: linux-pcmcia at lists.infradead.org
         Submitter: sanjoy at mrao.cam.ac.uk


Distribution: Debian testing

Hardware Environment: TP 600X, CardBus bridge: Texas Instruments PCI1450, using
Intersil (prism54) wlan card

Software Environment: in-kernel pcmcia drivers

Problem Description: 'cardctl eject' produces 
  PCMCIA: socket e248602c: *** DANGER *** unable to remove socket power

Ejecting the card physically does not produce those messages.

I notice this problem only with a 'low-latency preemptible kernel' (how the
choice is described in the make menuconfig).  In particular, the diff between
the kernel config that does not show the problem and the kernel config that does:

+CONFIG_DEBUG_PREEMPT=y
+CONFIG_HAVE_DEC_LOCK=y
+CONFIG_LOCK_KERNEL=y
-CONFIG_PREEMPT_VOLUNTARY=y
+CONFIG_PREEMPT_BKL=y
+CONFIG_PREEMPT=y



Steps to reproduce:

Stick in my WLAN card (prism54 chipset), then 'cardctl eject'

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