On Mon, Mar 12, 2007 at 05:25:09PM -0400, Alan Stern wrote: > On Mon, 12 Mar 2007, Jiri Slaby wrote: > > > Jiri Slaby napsal(a): > > > Alan Stern napsal(a): > > >> On Mon, 12 Mar 2007, Jiri Slaby wrote: > > >>> After rmmoding of uhci_hcd on fresh booted 2.6.21-rc3-mm2 I got this: > > >>> > > >>> BUG: atomic counter underflow at: > > > [...] > > >>> [<c01db754>] kobject_put+0x14/0x16 > > >>> [<c01db8a3>] kobject_unregister+0x22/0x25 > > >>> [<c024c987>] bus_remove_driver+0x75/0x82 > > >>> [<c024d3b8>] driver_unregister+0xb/0x18 > > >>> [<c01e7020>] pci_unregister_driver+0x13/0x73 > > >>> [<f88dbbd9>] uhci_hcd_cleanup+0xd/0x2d [uhci_hcd] > > > [...] > > >> Would it be possible for you to add the atomic counter underflow check > > >> to 2.6.21-rc3 and see if the problem still occurs? If it doesn't, > > >> that's a good indication the USB stack isn't guilty -- the bus > > >> registration code hasn't changed for several kernel releases. > > > > > > Yes. > > > > I can confirm, that this issue went upstream and is currently present there. > > I found the problem, but I don't know how to fix it. Hopefully Greg or > Rusty will know. > > There are two bugs in kernel/module.c:module_remove_driver(), right at the > end of the routine: > > /* > * Undo the additional reference we added in module_add_driver() > * via kset_find_obj() > */ > if (drv->mod_name) > kobject_put(&drv->kobj); >
This code is reverted in 2.6.21-rc3-git7 as it was incorrect as you have properly determined. So, can people please test with a kernel newer than that? thanks, greg k-h ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
