Re: [PATCH 2.6.10-rc1 4/4] driver-model: attach/detach sysfs node implemented

From: Dmitry Torokhov (dtor_core_at_ameritech.net)
Date: 11/04/04

  • Next message: Randy.Dunlap: "Re: QM_MODULES not implemented in 2.6.9" 
    Date:	Thu, 4 Nov 2004 11:06:19 -0800 (PST)
To: Greg KH <greg@kroah.com>

    > Greg KH wrote:
    > On Thu, Nov 04, 2004 at 12:05:31PM -0500, Dmitry Torokhov wrote:
    > > Also, there usually much more going on with regard to locking and
    > > other bus-specific actions besides taking bus's rwsem when binding
    > > devices. Serio bus will definitely get upset if you try to disconnect
    > > even a leaf device in the manner presented above and I think USB
    > > will get upset as well.
    >
    > No, we can disconnect a driver from a device just fine for USB with no

    What about connecting? I am pretty ignorant of USB inner workings
    but when I took a glance there seems to be a lot of preparations
    before device is ready to be probed...

    > problems (as long as it's not the hub driver from a hub device, we need
    > to never be able to disconnect those.)

    Never say never ;) That was the first thing I did after playing with
    PCI devices when I tried doing what Tejun did.

    If kernel advertises an userspace interface it will be used. I can see
    myself wanting to disconnect my hub and all its devices so my wireless
    explorer does not use batteries and I do not want to figure out what
    port it is connected to... Someone else will find another reason,
    I don't know.

    I also think that even PCI should kill children devices behind a bridge
    if bridge driver is disconnected to manage resources in more strict way.
    But I think that would require notion of generic/specialized driver and
    require automatic rebinding of specialized driver over generic one so
    every PCI device has a driver attached to it. 

    -- 
Dmitry
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  • Next message: Randy.Dunlap: "Re: QM_MODULES not implemented in 2.6.9"

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