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| author | Paolo Bonzini <pbonzini@redhat.com> | 2013-12-06 17:54:27 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2013-12-23 13:12:35 +0200 |
| commit | dcc209314afdaeec42f1e2a7bbf37eec3ace23de (patch) | |
| tree | e19b43b2d1acdc2bdb0b26dfe390e117ce19c963 /hw/s390x | |
| parent | 0293214b8c5bf56a095d0a39c5821c9da66dd566 (diff) | |
| download | qemu-dcc209314afdaeec42f1e2a7bbf37eec3ace23de.tar.gz | |
qdev: switch reset to post-order
Post-order is the only sensible direction for the reset signals.
For example, suppose pre-order is used and the parent has some data
structures that cache children state (for example a list of active
requests). When the reset method is invoked on the parent, these caches
could be in any state.
If post-order is used, on the other hand, these will be in a known state
when the reset method is invoked on the parent.
This change means that it is no longer possible to block the visit of
the devices, so the callback is changed to return void. This is not
a problem, because PCI was returning 1 exactly in order to achieve the
same ordering that this patch implements.
PCI can then rely on the qdev core having sent a "reset signal" (whatever
that means) to the device, and only do the PCI-specific initialization
with pci_do_device_reset.
MST: fixed up virtio-ccw
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/s390x')
| -rw-r--r-- | hw/s390x/virtio-ccw.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c index ecc80ecaf7..b79f04e9e9 100644 --- a/hw/s390x/virtio-ccw.c +++ b/hw/s390x/virtio-ccw.c @@ -30,13 +30,10 @@ static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size, VirtioCcwDevice *dev); -static int virtual_css_bus_reset(BusState *qbus) +static void virtual_css_bus_reset(BusState *qbus) { /* This should actually be modelled via the generic css */ css_reset(); - - /* we dont traverse ourself, return 0 */ - return 0; } |