Cornelia Huck <[email protected]> writes: > Virtio wants to release used indices after the corresponding > virtio device has been unregistered. However, virtio does not > hold an extra reference, giving up its last reference with > device_unregister(), making accessing dev->index afterwards > invalid. > > I actually saw problems when testing my (not-yet-merged) > virtio-ccw code: > > - device_add virtio-net,id=xxx > -> creates device virtio<n> with n>0 > > - device_del xxx > -> deletes virtio<n>, but calls ida_simple_remove with an > index of 0 > > - device_add virtio-net,id=xxx > -> tries to add virtio0, which is still in use... > > So let's save the index we want to release before calling > device_unregister().
Great catch! I've add a CC:stable. Applied, Rusty. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
