linux-kernel - Re: PCMCIA serial_cs driver binding problems.

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Message-ID: <3ae72650711230040t421af579xa92208ecbf20a0e2@mail.gmail.com>
Date:	Fri, 23 Nov 2007 09:40:47 +0100
From:	"Kay Sievers" <kay.sievers@...y.org>
To:	greg@...ellic.com
Cc:	linux-kernel@...r.kernel.org
Subject: Re: PCMCIA serial_cs driver binding problems.

On Nov 20, 2007 3:08 PM,  <greg@...ellic.com> wrote:
> I'm working to sort out what appear to be issues with binding of the
> serial_cs driver to a PCMCIA wireless card (Zoom).
>
> Card works perfectly in recent 2.6.2[23] kernels if cardmgr is running
> and PCMCIA_IOCTL support is in the kernel.  The serial_cs driver
> fails, however, to bind in a pure hotplug configuration.  The hotplug
> scripts detect card insertion and load the serial_cs module but the
> driver doesn't bind to the device.
>
> The slot number (0.0 or 1.0) appears in the /sys/bus/pcmcia/devices
> directory after card insertion.  The serial_cs directory also presents
> in the /sys/bus/pcmcia/drivers directory secondary to module load.
>
> I've tried to manually echo the device number (0.0 or 1.0) into the
> /sys/bus/pcmcia/drivers/serial_cs/bind pseudo-file but nothing
> happens.  The device number is present as a binding if cardmgr frobs
> things with the pcmcia_ioctl bind commands.

Did you enable this?
  echo -n 1 > /sys/devices/pci0000:00/0000:00:1e.0/0000:15:00.0/0.0/allow_func_id_match

You can watch "udevmonitor --kernel" while doing this, to get the path and
see what events the kernel creates.

Distros usually set it automatically by udev:
  ACTION=="add", SUBSYSTEM=="pcmcia", ENV{MODALIAS}=="?*",
ATTR{allow_func_id_match}="1"

Kay
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