[PATCH 03/12] hw/isa/lpc_ich9: Eliminate ICH9LPCState::isa_bus

[Bernhard Beschow <shentey@gmail.com>]

By using qdev_get_child_bus() we can eliminate ICH9LPCState::isa_bus and
spare the ich9_lpc variable in pc_q35, too.

Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
---
 include/hw/i386/ich9.h | 3 ---
 hw/i386/pc_q35.c       | 4 +---
 hw/isa/lpc_ich9.c      | 5 +----
 3 files changed, 2 insertions(+), 10 deletions(-)

diff --git a/include/hw/i386/ich9.h b/include/hw/i386/ich9.h
index 921e4c7ef6..05464f6965 100644
--- a/include/hw/i386/ich9.h
+++ b/include/hw/i386/ich9.h
@@ -1,7 +1,6 @@
 #ifndef HW_ICH9_H
 #define HW_ICH9_H
 
-#include "hw/isa/isa.h"
 #include "hw/sysbus.h"
 #include "hw/i386/pc.h"
 #include "hw/isa/apm.h"
@@ -64,8 +63,6 @@ struct ICH9LPCState {
                                        * triggers feature lockdown */
     uint64_t smi_negotiated_features; /* guest-invisible, host endian */
 
-    /* isa bus */
-    ISABus *isa_bus;
     MemoryRegion rcrb_mem; /* root complex register block */
     Notifier machine_ready;
 
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index 8fac0e57bc..4af8474f31 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -132,7 +132,6 @@ static void pc_q35_init(MachineState *machine)
     GSIState *gsi_state;
     ISABus *isa_bus;
     int i;
-    ICH9LPCState *ich9_lpc;
     PCIDevice *ahci;
     ram_addr_t lowmem;
     DriveInfo *hd[MAX_SATA_PORTS];
@@ -266,12 +265,11 @@ static void pc_q35_init(MachineState *machine)
     /* irq lines */
     gsi_state = pc_gsi_create(&x86ms->gsi, pcmc->pci_enabled);
 
-    ich9_lpc = ICH9_LPC_DEVICE(lpc);
     lpc_dev = DEVICE(lpc);
     for (i = 0; i < GSI_NUM_PINS; i++) {
         qdev_connect_gpio_out_named(lpc_dev, ICH9_GPIO_GSI, i, x86ms->gsi[i]);
     }
-    isa_bus = ich9_lpc->isa_bus;
+    isa_bus = ISA_BUS(qdev_get_child_bus(lpc_dev, "isa.0"));
 
     if (x86ms->pic == ON_OFF_AUTO_ON || x86ms->pic == ON_OFF_AUTO_AUTO) {
         pc_i8259_create(isa_bus, gsi_state->i8259_irq);
diff --git a/hw/isa/lpc_ich9.c b/hw/isa/lpc_ich9.c
index 54a8839cd2..71f7c18a2e 100644
--- a/hw/isa/lpc_ich9.c
+++ b/hw/isa/lpc_ich9.c
@@ -710,8 +710,6 @@ static void ich9_lpc_realize(PCIDevice *d, Error **errp)
     memory_region_init_io(&lpc->rcrb_mem, OBJECT(d), &rcrb_mmio_ops, lpc,
                           "lpc-rcrb-mmio", ICH9_CC_SIZE);
 
-    lpc->isa_bus = isa_bus;
-
     ich9_cc_init(lpc);
     apm_init(d, &lpc->apm, ich9_apm_ctrl_changed, lpc);
 
@@ -818,8 +816,7 @@ static void ich9_send_gpe(AcpiDeviceIf *adev, AcpiEventStatusBits ev)
 static void build_ich9_isa_aml(AcpiDevAmlIf *adev, Aml *scope)
 {
     Aml *field;
-    ICH9LPCState *s = ICH9_LPC_DEVICE(adev);
-    BusState *bus = BUS(s->isa_bus);
+    BusState *bus = qdev_get_child_bus(DEVICE(adev), "isa.0");
     Aml *sb_scope = aml_scope("\\_SB");
 
     /* ICH9 PCI to ISA irq remapping */
-- 
2.39.1