| Message ID | 20221104161513.2455862-6-peter.maydell@linaro.org |
|---|---|
| State | Handled Elsewhere |
| Headers | show |
| Series | reset: Remove some deprecated APIs | expand |
On 4/11/22 17:15, Peter Maydell wrote: > In the PCI subsystem we currently use the legacy function > qdev_reset_all() and qbus_reset_all(). These perform a recursive > reset, starting from either a qbus or a qdev. However they do not > permit any of the devices in the tree to use three-phase reset, > because device reset goes through the device_legacy_reset() function > that only calls the single DeviceClass::reset method. > > Switch to using the device_cold_reset() and bus_cold_reset() > functions. These also perform a recursive reset, where first the > children are reset and then finally the parent, but they use the new > (...in 2020...) Resettable mechanism, which supports both the old > style single-reset method and also the new 3-phase reset handling. > > This should be a no-behaviour-change commit which just reduces the > use of a deprecated API. > > Commit created with: > sed -i -e 's/qdev_reset_all/device_cold_reset/g;s/qbus_reset_all/bus_cold_reset/g' hw/pci/*.c > > Signed-off-by: Peter Maydell <peter.maydell@linaro.org> > --- > hw/pci/pci.c | 6 +++--- > hw/pci/pci_bridge.c | 2 +- > 2 files changed, 4 insertions(+), 4 deletions(-) Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
diff --git a/hw/pci/pci.c b/hw/pci/pci.c index 2f450f6a728..9d819cbe3b3 100644 --- a/hw/pci/pci.c +++ b/hw/pci/pci.c @@ -378,14 +378,14 @@ static void pci_do_device_reset(PCIDevice *dev) */ void pci_device_reset(PCIDevice *dev) { - qdev_reset_all(&dev->qdev); + device_cold_reset(&dev->qdev); pci_do_device_reset(dev); } /* * Trigger pci bus reset under a given bus. - * Called via qbus_reset_all on RST# assert, after the devices - * have been reset qdev_reset_all-ed already. + * Called via bus_cold_reset on RST# assert, after the devices + * have been reset device_cold_reset-ed already. */ static void pcibus_reset(BusState *qbus) { diff --git a/hw/pci/pci_bridge.c b/hw/pci/pci_bridge.c index da34c8ebcd1..b2b180edd61 100644 --- a/hw/pci/pci_bridge.c +++ b/hw/pci/pci_bridge.c @@ -275,7 +275,7 @@ void pci_bridge_write_config(PCIDevice *d, newctl = pci_get_word(d->config + PCI_BRIDGE_CONTROL); if (~oldctl & newctl & PCI_BRIDGE_CTL_BUS_RESET) { /* Trigger hot reset on 0->1 transition. */ - qbus_reset_all(BUS(&s->sec_bus)); + bus_cold_reset(BUS(&s->sec_bus)); } }
In the PCI subsystem we currently use the legacy function qdev_reset_all() and qbus_reset_all(). These perform a recursive reset, starting from either a qbus or a qdev. However they do not permit any of the devices in the tree to use three-phase reset, because device reset goes through the device_legacy_reset() function that only calls the single DeviceClass::reset method. Switch to using the device_cold_reset() and bus_cold_reset() functions. These also perform a recursive reset, where first the children are reset and then finally the parent, but they use the new (...in 2020...) Resettable mechanism, which supports both the old style single-reset method and also the new 3-phase reset handling. This should be a no-behaviour-change commit which just reduces the use of a deprecated API. Commit created with: sed -i -e 's/qdev_reset_all/device_cold_reset/g;s/qbus_reset_all/bus_cold_reset/g' hw/pci/*.c Signed-off-by: Peter Maydell <peter.maydell@linaro.org> --- hw/pci/pci.c | 6 +++--- hw/pci/pci_bridge.c | 2 +- 2 files changed, 4 insertions(+), 4 deletions(-)