On Tue, Apr 01, 2003 at 05:24:11PM +0100, Nick Craig-Wood wrote: > On Fri, Mar 21, 2003 at 05:29:45PM -0800, Greg KH wrote: > > On Fri, Mar 21, 2003 at 12:51:15PM +0000, Nick Craig-Wood wrote: > > > I first noticed this problem in the 2.4.20 kernel. I checked out the > > > latest bk kernel from bk://linuxusb.bkbits.net/usb-2.4 to test if the > > > problem was still there. > > > > > > In a nutshell the problem seems to be that a panic happens if the > > > keyspan driver is receiving data when the port is closed. > > > > Yeah, a lot of people have this problem right now :( > > It should be fixed in 2.5, can you grab 2.5.65 and let me know if you > > still have the same problem there? > > I tried 2.5.66 and yes it no longer Oopses on close! I tried it 100 > times on USA-49W and USA-49WLC just to be sure.
Good :) > Is it easy to break out a patch for this for 2.4? I'd willingly test > it for you. Heh, it isn't a simple patch, sorry. I'll try to get some time to work on it, but help is appreciated. > > Also, sometimes switching host controller drivers seems to fix the > > problem for some people (from uhci.o to usb-uhci.o or the other way > > around), if you have a UHCI controller. > > I tried moving from usb-uhci to uchi with no improvement :-( > > This testing turned up another problem though... Bad :( > While testing on 2.5 I tried to use multiple ports at once with > cambert. The problem is that only the first port transfers data > properly - the second and subsequent ports transfer very little data. > mostly. (I did see it once transfer an outrageously large amount like > 100MB in a second but I haven't managed to reproduce this!) > > Once cambert has got going it just does non-blocking reads and writes > into all the sockets it has open. Eg from strace... What is cambert doing? Any chance to see the source? Could we just be flooding the first port and not getting a chance to send any data out the second? What causes the test to end, one port finishing? Does slower baud rates work ok? thanks, greg k-h ------------------------------------------------------- This SF.net email is sponsored by: ValueWeb: Dedicated Hosting for just $79/mo with 500 GB of bandwidth! No other company gives more support or power for your dedicated server http://click.atdmt.com/AFF/go/sdnxxaff00300020aff/direct/01/ _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
