On Sat, 19 Jun 2004, Ian Morgan wrote: > Originally posted as a reply to an earlier thread, thinking the problems > were related, but apparently not, so I'm reposting as a new thread so more > people might see it. Thanks to anyone who can help. > > I have 3 Addonics 4-slot PCMCIA card reader attached via two 7-port D-Link > hub. All units are USB 2.0 (reported in /proc/bus/usb/devices as 480Mbps). > The problem occurs even with just one slot connected by one hub and > everything else disconncted. All readers and hubs are powered by extrernal > AC adapters, so power draw from the bus should not be an issue. > > I've tried these kernels: > 2.6.6 > 2.6.7 > 2.6.7 + 2.6.7-rc3-mm2's big USB patch > all both with and witout kernel pre-emption enabled. > > I can insert a PCMCIA card and, w/ usb-storage, see it as /dev/sda. But here > is the problem: I can only do this (roughly) twice. After ejecting it the > 2nd time, and inserting it the 3rd time, the USB subsystem seems to hang, > and rather than detecting the card, goes into an infinite cycle of > attempting and failing to reset the bus. The 3 insertion cycles is almost > always constant, but it has once allowed me 6 cycles before it locked up. > During that one 6-cycle count, the same hang appeard after the 3rd > insertion, but the bus actually recovered after one reset attempt, but then > locked up after the 6th insertion never to recover again. > > As well as the PIIX4 system (Asus P4PE) above, I've now also tried it on a > VIA system (686B-based notebook), and both exhibit the problem, though on > the notebook I can get over a dozen insertion cycles before the deadlock.
> Can anyone help, or at least tell me that this is the same problem seen in the > earlier parts of this thread? > > Regards, > Ian Morgan I can't offer any detailed help right now, but this looks like you're encountering problems with device locking during bus resets. Or maybe some other problem, but clearly related to bus resets. I've been spending a lot of time working on that code recently. It's not all done yet, but it should be testable by the end of next week. Try reminding me about it at that time. Alan Stern ------------------------------------------------------- This SF.Net email is sponsored by The 2004 JavaOne(SM) Conference Learn from the experts at JavaOne(SM), Sun's Worldwide Java Developer Conference, June 28 - July 1 at the Moscone Center in San Francisco, CA REGISTER AND SAVE! http://java.sun.com/javaone/sf Priority Code NWMGYKND _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
