[Bug 166] New: u-boot cdc_acm hot un-plug/replug hang
bugzilla-daemon at bugzilla.openmoko.org
bugzilla-daemon at bugzilla.openmoko.org
Tue Feb 6 02:22:00 CET 2007
http://bugzilla.openmoko.org/cgi-bin/bugzilla/show_bug.cgi?id=166
Summary: u-boot cdc_acm hot un-plug/replug hang
Product: OpenMoko
Version: current svn head
Platform: Neo1973
OS/Version: Linux
Status: NEW
Severity: minor
Priority: P2
Component: u-boot
AssignedTo: laforge at openmoko.org
ReportedBy: laforge at openmoko.org
If you use u-boot cdc_acm on the Neo1973, then unplug the USB cable while some
stuff is printed to stdout, and then re-plug the USB cable, it is not working
very reliably.
Sometimes, stdin of u-boot is not working again. Initial debugging shows that
* the USB control endpoint enumerates cleanly
* the USB interrupt processing for incoming data (OUT endpoint) works
* somewhere in usbtty_poll, a data abort was caused and results in endless looping
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