[Qemu-devel] [PATCH for-4.1 3/4] hw/isa/superio: Support chipsets with no Floppy Disk controller

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

Not all Super I/O chipsets provide a Floppy Disk Controller.

Without this change, using a Super I/O with no FDC would abort QEMU with:

  Initialization of device isa-fdc failed: ISA controller does not support DMA

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 hw/isa/isa-superio.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hw/isa/isa-superio.c b/hw/isa/isa-superio.c
index b0761ea1f96..6956f06d529 100644
--- a/hw/isa/isa-superio.c
+++ b/hw/isa/isa-superio.c
@@ -113,7 +113,8 @@ static void isa_superio_realize(DeviceState *dev, Error **errp)
     }
 
     /* Floppy disc */
-    if (!k->floppy.is_enabled || k->floppy.is_enabled(s, 0)) {
+    if (k->floppy.count
+            && (!k->floppy.is_enabled || k->floppy.is_enabled(s, 0))) {
         isa = isa_create(bus, "isa-fdc");
         d = DEVICE(isa);
         if (k->floppy.get_iobase) {
-- 
2.20.1