On Mon, Dec 20, 2010 at 02:33:35PM +0900, Isaku Yamahata wrote: > Stefan Weil reported the regression caused by > ec990eb622ad46df5ddcb1e94c418c271894d416 as follows > > > The second regression also occurs with MIPS malta. > > Networking no longer works with the default pcnet nic. > > > > This is caused because the reset function for pcnet is no > > longer called during system boot. The result in an invalid > > mac address (all zero) and a non-working nic. > > > > For this second regression I still have no simple solution. > > Of course mips_malta.c should be converted to qdev which > > would fix both problems (but only for malta system emulation). > > The issue is, it is assumed that all qbuses, qdeves are under > main_system_bus. But there are qbuses whose parent is NULL. So it > is necessary to trigger reset for those qbuses. > (On the other hand, if NULL is passed to qdev_create(), its parent bus > is main_system_bus.) > Ideally those buses should be moved under bus controller > device which is qdev. But it's not done yet. > So register qbus reset handler for qbus whose parent is NULL. > > Reported-by: Stefan Weil <w...@mail.berlios.de> > Signed-off-by: "Michael S. Tsirkin" <m...@redhat.com> > Signed-off-by: Isaku Yamahata <yamah...@valinux.co.jp>
Applied, thanks! > --- > Changes v1 -> v2: > - unregister reset handler in qbus_free() > - update the comment > - remove ugly void* cast with wrapper > - assert() in qbus_free() because main_system_bus is never freed > --- > hw/qdev.c | 14 +++++++++++++- > hw/qdev.h | 2 ++ > vl.c | 4 +++- > 3 files changed, 18 insertions(+), 2 deletions(-) > > diff --git a/hw/qdev.c b/hw/qdev.c > index 6fc9b02..d93a6c4 100644 > --- a/hw/qdev.c > +++ b/hw/qdev.c > @@ -333,6 +333,12 @@ void qbus_reset_all(BusState *bus) > qbus_walk_children(bus, qdev_reset_one, qbus_reset_one, NULL); > } > > +void qbus_reset_all_fn(void *opaque) > +{ > + BusState *bus = opaque; > + qbus_reset_all(bus); > +} > + > /* can be used as ->unplug() callback for the simple cases */ > int qdev_simple_unplug_cb(DeviceState *dev) > { > @@ -754,8 +760,11 @@ void qbus_create_inplace(BusState *bus, BusInfo *info, > if (parent) { > QLIST_INSERT_HEAD(&parent->child_bus, bus, sibling); > parent->num_child_bus++; > + } else if (bus != main_system_bus) { > + /* TODO: once all bus devices are qdevified, > + only reset handler for main_system_bus should be registered here. > */ > + qemu_register_reset(qbus_reset_all_fn, bus); > } > - > } > > BusState *qbus_create(BusInfo *info, DeviceState *parent, const char *name) > @@ -778,6 +787,9 @@ void qbus_free(BusState *bus) > if (bus->parent) { > QLIST_REMOVE(bus, sibling); > bus->parent->num_child_bus--; > + } else { > + assert(bus != main_system_bus); /* main_system_bus is never freed */ > + qemu_unregister_reset(qbus_reset_all_fn, bus); > } > qemu_free((void*)bus->name); > if (bus->qdev_allocated) { > diff --git a/hw/qdev.h b/hw/qdev.h > index aaaf55a..b239bb4 100644 > --- a/hw/qdev.h > +++ b/hw/qdev.h > @@ -199,6 +199,8 @@ int qdev_walk_children(DeviceState *dev, qdev_walkerfn > *devfn, > qbus_walkerfn *busfn, void *opaque); > void qdev_reset_all(DeviceState *dev); > void qbus_reset_all(BusState *bus); > +void qbus_reset_all_fn(void *opaque); > + > void qbus_free(BusState *bus); > > #define FROM_QBUS(type, dev) DO_UPCAST(type, qbus, dev) > diff --git a/vl.c b/vl.c > index c4d3fc0..8d6bab4 100644 > --- a/vl.c > +++ b/vl.c > @@ -3088,7 +3088,9 @@ int main(int argc, char **argv, char **envp) > exit(1); > } > > - qemu_register_reset((void *)qbus_reset_all, sysbus_get_default()); > + /* TODO: once all bus devices are qdevified, this should be done > + * when bus is created by qdev.c */ > + qemu_register_reset(qbus_reset_all_fn, sysbus_get_default()); > qemu_run_machine_init_done_notifiers(); > > qemu_system_reset(); > -- > 1.7.1.1