From 78e4d5cbaf472c60ebf0516816b2a38a78b48b0b Mon Sep 17 00:00:00 2001 From: Peter Maydell Date: Fri, 16 Dec 2022 15:55:26 +0000 Subject: [PATCH] pci: Use device_cold_reset() and bus_cold_reset() 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 --- hw/pci/pci.c | 6 +++--- hw/pci/pci_bridge.c | 2 +- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/hw/pci/pci.c b/hw/pci/pci.c index e6292d8060..c61348dca0 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 da34c8ebcd..b2b180edd6 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)); } }