On Wed, Apr 22, 2009 at 02:43:56PM -0400, Alan Stern wrote: > On Wed, 22 Apr 2009, Greg KH wrote: > > > On Thu, Apr 23, 2009 at 01:40:08AM +0800, tom.leiming@xxxxxxxxx wrote: > > > From: Ming Lei <tom.leiming@xxxxxxxxx> > > > > > > This patch releases the usb_serial_port object after releasing > > > usb_serial object, because .shutdown of usb_serial_driver often > > > references port object and it is called in destroy_serial(), > > > when it is touched, port object has been released. > > > > > > This bug is introduced by Alan's patch: > > > usb-serial-fix-lifetime-and-locking-problems.patch. > > > > > > The bug is reproduced very easily by the following steps: > > > 1, plug a usb serial port and unplug it; > > > or > > > 2,plug a use serial port, open it ,disconnect it, and close it. > > > > > > In each case, the oops will happen: > > > > Ick. > > > > Alan, care to take this patch, merge it with yours and then I can take > > the new one? I don't want to add a patch that is known broken to the > > tree. > > Yeah, I'll take a look at it. Will anyone be able to test a new patch > (I don't have any USB serial devices)? Yes, I have a few dozen here :) thanks, greg k-h -- 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
