[Qemu-devel] [PATCH] i8257: Make device "i8257" unavailable with -device

[Markus Armbruster]

The ISA DMA controller needs to be wired up to the ISA bus by
isa_bus_dma() to actually work.

Signed-off-by: Markus Armbruster <address@hidden>
---
 hw/dma/i8257.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/hw/dma/i8257.c b/hw/dma/i8257.c
index f345c54..f90df1d 100644
--- a/hw/dma/i8257.c
+++ b/hw/dma/i8257.c
@@ -598,6 +598,8 @@ static void i8257_class_init(ObjectClass *klass, void *data)
     idc->release_DREQ = i8257_dma_release_DREQ;
     idc->schedule = i8257_dma_schedule;
     idc->register_channel = i8257_dma_register_channel;
+    /* Reason: needs to be wired up by isa_bus_dma() to work */
+    dc->cannot_instantiate_with_device_add_yet = true;
 }
 
 static const TypeInfo i8257_info = {
-- 
2.5.5