[RFC PATCH 07/11] hw/isa: Simplify isa_get_irq()

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

Previous commit removed the calls to isa_get_irq() passing a NULL
ISADevice. Simplify the assertion, removing the use on the global
isabus object.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 hw/isa/isa-bus.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/hw/isa/isa-bus.c b/hw/isa/isa-bus.c
index b946e6dc478..65a26ac6c2c 100644
--- a/hw/isa/isa-bus.c
+++ b/hw/isa/isa-bus.c
@@ -89,7 +89,11 @@ qemu_irq isa_bus_get_irq(ISABus *bus, unsigned isairq)
  */
 qemu_irq isa_get_irq(ISADevice *dev, unsigned isairq)
 {
-    assert(!dev || ISA_BUS(qdev_get_parent_bus(DEVICE(dev))) == isabus);
+    ISABus *isabus;
+
+    assert(dev);
+    isabus = isa_bus_from_device(dev);
+
     return isa_bus_get_irq(isabus, isairq);
 }
 
-- 
2.26.3