isa-bus: Remove bogus IRQ sharing check

Nothing prevented IRQ sharing on the ISA bus in principle. Not all
boards supported this, neither each and every card nor driver and OS.
Still, there existed valid IRQ sharing scenarios, (at least) two of them
can also be found in QEMU: >2 PC UARTs and the PREP IDE buses.

So remove this artificial restriction from our ISA model.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

2 files changed, 2 insertions, 2 deletions

diff --git a/hw/ide/piix.c b/hw/ide/piix.c
index d4289af..c349644 100644
--- a/hw/ide/piix.c
+++ b/hw/ide/piix.c
@@ -122,7 +122,7 @@ static void pci_piix_init_ports(PCIIDEState *d) {
     for (i = 0; i < 2; i++) {
         ide_bus_new(&d->bus[i], &d->dev.qdev, i);
         ide_init_ioport(&d->bus[i], port_info[i].iobase, port_info[i].iobase2);
-        ide_init2(&d->bus[i], isa_reserve_irq(port_info[i].isairq));
+        ide_init2(&d->bus[i], isa_get_irq(port_info[i].isairq));
 
         bmdma_init(&d->bus[i], &d->bmdma[i]);
         d->bmdma[i].bus = &d->bus[i];
diff --git a/hw/ide/via.c b/hw/ide/via.c
index 0e90679..04f3290 100644
--- a/hw/ide/via.c
+++ b/hw/ide/via.c
@@ -145,7 +145,7 @@ static void vt82c686b_init_ports(PCIIDEState *d) {
     for (i = 0; i < 2; i++) {
         ide_bus_new(&d->bus[i], &d->dev.qdev, i);
         ide_init_ioport(&d->bus[i], port_info[i].iobase, port_info[i].iobase2);
-        ide_init2(&d->bus[i], isa_reserve_irq(port_info[i].isairq));
+        ide_init2(&d->bus[i], isa_get_irq(port_info[i].isairq));
 
         bmdma_init(&d->bus[i], &d->bmdma[i]);
         d->bmdma[i].bus = &d->bus[i];