Re: Heads up for distro folks: PCMCIA hotplug differences (Re: -rc4: arm broken?)

From: Russell King (rmk+lkml_at_arm.linux.org.uk)
Date: 08/01/05

  • Next message: Shaohua Li: "Re: [ACPI] S3 and sigwait (was Re: 2.6.13-rc3: swsusp works (TP 600X))" 
    Date:	Mon, 1 Aug 2005 07:48:31 +0100
To: Alan Cox <alan@lxorguk.ukuu.org.uk>

    On Mon, Aug 01, 2005 at 02:01:07AM +0100, Alan Cox wrote:
    > On Sad, 2005-07-30 at 22:36 +0100, Russell King wrote:
    > > Since PCMCIA cards are detected and drivers bound at boot time, we no
    > > longer get hotplug events to setup networking for PCMCIA network cards
    > > already inserted. Consequently, if you are relying on /sbin/hotplug to
    > > setup your PCMCIA network card at boot time, triggered by the cardmgr
    > > startup binding the driver, it won't happen.
    >
    > So eth0 now randomly changes between on board and PCMCIA depending upon
    > whether the PCMCIA card was inserted or not, and your disks re-order
    > themselves in the same situation. That'll be funny if anyone does a
    > mkswap to share their swap between Linux and Windows. Gosh look there
    > goes the root partition.
    >
    > I'm hoping thats not what you are implying. Especially for disks,
    > network is much much less of an issue.

    If you have the socket driver as a module, as some (most?) distros do,
    then of course such cards won't be detected at boot time. If PCMCIA
    and the socket driver are built-in, along with the card driver, then
    I guess this possibility may well exist - it does for NE2K cards.

    Since I don't use CF cards with PCMCIA here, I can't say what the ide-cs
    behaviour actually is. This is why I'm trying to encourage folk to
    explore the kernels new behaviour. 

    -- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 Serial core
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