On Mon, 3 Nov 2014, Benjamin Tissoires wrote: > When a subdriver is rmmod-ed then re-insmod-ed, the hid device is not > destroyed as it is owned by the transport layer. > So when we re-probed the device, the hid device is assumed to be already > claimed, and can lead to page faults if hid-core tries to forward the > emitted data to the to-be-created claimed node. > > Signed-off-by: Benjamin Tissoires <benjamin.tissoi...@redhat.com> > --- > > Hi Jiri, > > [keeping the people involved in the logitech-hidpp driver in CC] > > this one was particularly nasty. I had several page faults when just > rmmod && insmod the hid-logitech-hidpp driver. The page fault was occuring > in hidraw :/ > I was not able to get a stacktrace which I could include here. The laptop was > completely unresponsive and I could take only a picture to debug it.
Thanks a lot for tracking it down, Benjamin, tricky one indeed. Queuing for 3.18 still. -- Jiri Kosina SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
