Bug 59317
| Summary: | Kernel crash when plugging/unplugging Tripp-Lite USB-Serial Adapter | ||||||||
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| Product: | [Retired] Red Hat Linux | Reporter: | Scott Gifford <sgifford> | ||||||
| Component: | kernel | Assignee: | Pete Zaitcev <zaitcev> | ||||||
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Brian Brock <bbrock> | ||||||
| Severity: | high | Docs Contact: | |||||||
| Priority: | medium | ||||||||
| Version: | 7.2 | ||||||||
| Target Milestone: | --- | ||||||||
| Target Release: | --- | ||||||||
| Hardware: | i386 | ||||||||
| OS: | Linux | ||||||||
| URL: | http://www.suspectclass.com/~sgifford/kernel-crash/usb-serial/ | ||||||||
| Whiteboard: | |||||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||||
| Doc Text: | Story Points: | --- | |||||||
| Clone Of: | Environment: | ||||||||
| Last Closed: | 2003-06-08 01:08:26 UTC | Type: | --- | ||||||
| Regression: | --- | Mount Type: | --- | ||||||
| Documentation: | --- | CRM: | |||||||
| Verified Versions: | Category: | --- | |||||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||||
| Embargoed: | |||||||||
| Attachments: |
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Created attachment 44497 [details]
Contents of /var/log/messages during crash
Created attachment 44498 [details]
ksymoops of crash
looks like something kept trying to use the module while it was unloaded... Would you mind installing 2.4.9-31 and tell me how that goes? My laptop is out of commission...I'll try it next week, when I get a new battery and power cord. We issued a rawhide kernel (2.4.18-0.13) which probably has the fix for it. Make sure you try that instead of 2.4.9-31 as I suggested earlier. 2.4.18-0.13 is a huge step up. The kernel no longer crashes, and I can use the serial port! Unfortunately, after quite a few opens and closes of the serial port (about 100) it seems to stop working, and has to be unplugged and plugged back in. Still, I'm much happier with what I've got now. If you'd like more info on what's going on when it stops working, let me know and I'll gather it. Otherwise, go ahead and close this out. Thanks!! |
From Bugzilla Helper: User-Agent: Mozilla/4.78 [en] (X11; U; Linux 2.4.9-13 i686) Description of problem: I'm having trouble using my Tripp-Lite USB-Serial adapter with your pl2303 driver. It is detected properly and I am able to communicate with it briefly, but the data is gibberish and eventually it stops working. After that, if I unplug the USB cable and plug it back in, the kernel crashes (!). Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1. Boot system 2. Plug in USB-Serial Adapter 3. Run program which uses /dev/usb/ttyUSB0 4. Run program again 5. Unplug USB-Serial Adapter 6. If kernel is still up, plug it back in Actual Results: Kernel crashes. Expected Results: Kernel not crashing, or better yet, device working properly. Additional info: This adapter is a Tripp-Lite U209-000-R: http://www.1tripplite.com/products/usb.htm It is detected as pl2303, and looks identical to the one made by ATEN which has been reported to work with this driver: http://www.aten-usa.com/products/product.php?ITEM=UC232A http://www.linuxfocus.org/English/November2001/article223.shtml I'm using the RedHat 2.4.9-13 kernel. Detailed traces and logs are available at: http://www.suspectclass.com/~sgifford/kernel-crash/usb-serial/ When I plug the cable in, it seems to be detected normally: Feb 4 20:18:53 localhost kernel: hub.c: USB new device connect on bus1/1, assigned device number 2 Feb 4 20:18:53 localhost kernel: usb.c: USB device 2 (vend/prod 0x67b/0x2303) is not claimed by any active driver. Feb 4 20:18:53 localhost kernel: usbserial.c: USB Serial support registered for Generic Feb 4 20:18:53 localhost kernel: usb.c: registered new driver serial Feb 4 20:18:53 localhost kernel: usbserial.c: USB Serial Driver core v1.3 Feb 4 20:18:53 localhost kernel: usbserial.c: USB Serial support registered for PL-2303 Feb 4 20:18:53 localhost kernel: usbserial.c: PL-2303 converter detected Feb 4 20:18:53 localhost kernel: usbserial.c: PL-2303 converter now attached to ttyUSB0 (or usb/tts/0 for devfs) Feb 4 20:18:53 localhost kernel: pl2303.c: Prolific PL2303 USB to serial adaptor driver v0.7 Then I run my program, which simply opens /dev/usb/ttyUSB0, runs "stty ispeed 19200 ospeed 19200 raw" on it, then sends a modem init string and waits for an OK. It acts like it's working but getting gibberish the first time I run it (which could be a bug in my program), but the next time I run it I get: Feb 4 20:19:47 localhost kernel: usb-uhci.c: ENXIO c0418280, flags 0, urb c6a2c8a0, burb c6a2c8a0 Feb 4 20:19:47 localhost kernel: pl2303.c: pl2303_open - failed submitting read urb, error -6 Feb 4 20:19:50 localhost kernel: usb-uhci.c: interrupt, status 3, frame# 1699 Feb 4 20:19:50 localhost kernel: usb-uhci.c: interrupt, status 3, frame# 1701 Feb 4 20:19:50 localhost kernel: usb-uhci.c: interrupt, status 3, frame# 1703 Feb 4 20:19:50 localhost kernel: usb-uhci.c: interrupt, status 3, frame# 1705 in the log, and my application gets an EPROTO error when it tries to open the serial port. After that, I unplug the USB cable and plug it back in, and then I get an Oops and my system crashes: http://www.suspectclass.com/~sgifford/kernel-crash/usb-serial/ksymoops.txt