On Mon, Feb 06, 2012 at 12:57:58PM -0500, Alan Stern wrote: > On Mon, 6 Feb 2012, Alan Stern wrote: > > > On Mon, 6 Feb 2012, Dave Jones wrote: > > > > > We've had a few reports of the "clear_halt for a busy endpoint" WARN > > > from ehci_endpoint_reset(). > > > > > > https://bugzilla.redhat.com/show_bug.cgi?id=749907 > > > > > > https://bugzilla.redhat.com/show_bug.cgi?id=781762 > > > > > > https://bugzilla.redhat.com/show_bug.cgi?id=787533 > > > > > > The common theme seems to be that they all have usblp loaded. > > > > > > What can we do to help diagnose these ? > > > > Have the bug reporters collect a usbmon trace, following the > > instructions in Documentation/usb/usbmon.txt. > > It's worth noting that all three stack traces show the bad clear_halt > coming from a user program called "hp". Whatever that program is, it > appears to be doing something stupid -- and changing the kernel won't > help. https://bugzilla.redhat.com/show_bug.cgi?id=787533 now has a usbmon log attached. It seems that 'hp' comes from the hplip package. I'm completely unfamiliar with any of the printing code, but at least we have the source for this, so if it does turn out to be dumb userspace, we could feasibly get it fixed. thanks, Dave -- 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
