[PATCH-for-6.0?] hw/block/fdc: Fix 'fallback' property on sysbus floppy disk controllers

[Philippe Mathieu-Daudé]

Setting the 'fallback' property corrupts the QOM instance state
(FDCtrlSysBus) because it accesses an incorrect offset (it uses
the offset of the FDCtrlISABus state).

Fixes: a73275dd6fc ("fdc: Add fallback option")
Signed-off-by: Philippe Mathieu-Daudé <f4...@amsat.org>
---
 hw/block/fdc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/block/fdc.c b/hw/block/fdc.c
index 82afda7f3a7..a825c2acbae 100644
--- a/hw/block/fdc.c
+++ b/hw/block/fdc.c
@@ -2893,7 +2893,7 @@ static Property sysbus_fdc_properties[] = {
     DEFINE_PROP_SIGNED("fdtypeB", FDCtrlSysBus, state.qdev_for_drives[1].type,
                         FLOPPY_DRIVE_TYPE_AUTO, qdev_prop_fdc_drive_type,
                         FloppyDriveType),
-    DEFINE_PROP_SIGNED("fallback", FDCtrlISABus, state.fallback,
+    DEFINE_PROP_SIGNED("fallback", FDCtrlSysBus, state.fallback,
                         FLOPPY_DRIVE_TYPE_144, qdev_prop_fdc_drive_type,
                         FloppyDriveType),
     DEFINE_PROP_END_OF_LIST(),
@@ -2918,7 +2918,7 @@ static Property sun4m_fdc_properties[] = {
     DEFINE_PROP_SIGNED("fdtype", FDCtrlSysBus, state.qdev_for_drives[0].type,
                         FLOPPY_DRIVE_TYPE_AUTO, qdev_prop_fdc_drive_type,
                         FloppyDriveType),
-    DEFINE_PROP_SIGNED("fallback", FDCtrlISABus, state.fallback,
+    DEFINE_PROP_SIGNED("fallback", FDCtrlSysBus, state.fallback,
                         FLOPPY_DRIVE_TYPE_144, qdev_prop_fdc_drive_type,
                         FloppyDriveType),
     DEFINE_PROP_END_OF_LIST(),
-- 
2.26.3