(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). On Tue, 28 Jun 2011 15:37:08 GMT bugzilla-daemon@xxxxxxxxxxxxxxxxxxx wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=38462 > > Summary: USB<->serial (pl2303) 100% CPU usage loop in 2.6.39.2 > (w/ bisection) > Product: Drivers > Version: 2.5 > Kernel Version: 2.6.39.2 > Platform: All > OS/Version: Linux > Tree: Mainline > Status: NEW > Severity: high > Priority: P1 > Component: USB > AssignedTo: greg@xxxxxxxxx > ReportedBy: akwatts@xxxxxxxxx > Regression: Yes > > > Commit d14fc1a74e846d7851f24fc9519fe87dc12a1231 (introduced in 2.6.37.1) causes > userspace dialers (ppp+wvdial) to sometimes enter a 100% CPU utilization loop > on disconnect -> connect cycles with a pl2303-driven Trendnet (tu-s9) > USB-serial adapter and US Robotics external 56K modem. > > commit d14fc1a74e846d7851f24fc9519fe87dc12a1231 > Author: Libor Pechacek <lpechacek@xxxxxxx> > Date: Fri Jan 14 14:30:21 2011 +0100 > USB: serial: handle Data Carrier Detect changes > > I have not been able to systematically reproduce except by > connect->disconnect->(turn modem off and back on)->connect. > > The original bug report (bug #30072), which contains a lot more background > including an strace of the runaway process, seems to have fallen off the radar > screen because it stayed as INSUFFICIENT_DATA for too long (this was my fault). > > This report reflects that the problem remains in the 2.6.39.x tree (tested > through 2.6.39.2) > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
