Re: [linux-dvb-maintainer] Re: [OOPS] Linux 2.6.14.2 and DVB USB

From: Johannes Stezenbach (js_at_linuxtv.org)
Date: 11/15/05

  • Next message: Ingo Molnar: "Re: [BUG] Softlockup detected with linux-2.6.14-rt6" 
    Date:	Tue, 15 Nov 2005 16:28:23 +0100
To: Patrick Boettcher <patrick.boettcher@desy.de>

    On Tue, Nov 15, 2005 Patrick Boettcher wrote:
    > On Mon, 14 Nov 2005, Chris Rankin wrote:
    > >This sounds contrary to the entire concept of hotplugging to me. And I
    > >don't think that a typical
    > >desktop user would be happy to be told that s/he needs to become root and
    > >unload kernel modules
    > >before s/he can unplug a USB device.
    >
    > Unfortunately the dvb-core is currently not able to handle hotplugging
    > while a dvb application is accessing a dvb-dev-node. This applies
    > for every dvb-device, not only for dvb-usb devices, but no one ever tried
    > to unplug a DVB PCI card while using it, yet.
    >
    > Before unplugging a device, you can check if the module is removable to
    > make sure that really no application is currently using it. (You will get
    > "module in use" then).
    >
    > We already thought about that problem and we think that dvbdev.c is the
    > correct place to start implementing that, but I don't have enough
    > knowledge (and time) to do that now, sorry.

    I thought someone sent a patch which fixes it for the cinergyT2
    recently? Wouldn't the same approach work for dvb-usb?
    (But I haven't had a chance to test the cinergyT2 patch yet.)

    Johannes
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