Messages in this thread | | | Date | Tue, 15 Nov 2005 17:43:21 +0100 | From | Johannes Stezenbach <> | Subject | Re: [linux-dvb-maintainer] Re: [OOPS] Linux 2.6.14.2 and DVB USB |
| |
Patrick Boettcher wrote: > On Tue, 15 Nov 2005, Johannes Stezenbach wrote: > > Patrick Boettcher wrote: > >>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.) > > Once Deti Fliegl created that patch I had a look at it to figure out if it > can easily be adapted to dvb-usb. This is was my answer: > > http://www.linuxtv.org/pipermail/linux-dvb/2005-October/005333.html > > After that mail I had some private mails with Deti, but he is currently > too busy to adapt his mechanism to dvbdev.c and I'm too stupid.
The advantage of keeping development stuff on the lists is that someone else might actually write a patch to address the issue...
> The cinergy-driver handles the frontend in a different way and that's > why it is possible to fix it like Deti does it. > > If I could fix it in in dvb-usb, then it would be again only fixed for a > small amount of devices. For DVB-PCMCIA-cards using the default > fe-architecture will also cause Oopses like that, when unplugging while > having the device in use. That's why, IMHO, the dvb-core should be made > hotplug-safe, not a single driver. Even worse: it's not just the > frontend-device-nodes, but also the demux-nodes (and I think the other > onces too).
I agree. Could you post a summary of your conversation with Deti to linux-dvb so someone else could start working on it?
Thanks, Johannes - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |