Cornelia Huck <cornelia.h...@de.ibm.com> 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. _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization
