[Qemu-devel] [PATCH] fdc: fix drive property handling.

[Gerd Hoffmann <kraxel@redhat.com>]

Fix the floppy controller init wrappers to set the drive properties
only in case the DriveInfo pointers passed in are non NULL.  This allows
to set the properties using -global.

[ v2: fix code style issues pointed out by Aurelien Jarno ]

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/fdc.c |   20 +++++++++++++++-----
 1 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/hw/fdc.c b/hw/fdc.c
index eb39e30..42b6d7d 100644
--- a/hw/fdc.c
+++ b/hw/fdc.c
@@ -1860,8 +1860,12 @@ FDCtrl *fdctrl_init_isa(DriveInfo **fds)
     ISADevice *dev;
 
     dev = isa_create("isa-fdc");
-    qdev_prop_set_drive(&dev->qdev, "driveA", fds[0]);
-    qdev_prop_set_drive(&dev->qdev, "driveB", fds[1]);
+    if (fds[0]) {
+        qdev_prop_set_drive(&dev->qdev, "driveA", fds[0]);
+    }
+    if (fds[1]) {
+        qdev_prop_set_drive(&dev->qdev, "driveB", fds[1]);
+    }
     if (qdev_init(&dev->qdev) < 0)
         return NULL;
     return &(DO_UPCAST(FDCtrlISABus, busdev, dev)->state);
@@ -1878,8 +1882,12 @@ FDCtrl *fdctrl_init_sysbus(qemu_irq irq, int dma_chann,
     sys = DO_UPCAST(FDCtrlSysBus, busdev.qdev, dev);
     fdctrl = &sys->state;
     fdctrl->dma_chann = dma_chann; /* FIXME */
-    qdev_prop_set_drive(dev, "driveA", fds[0]);
-    qdev_prop_set_drive(dev, "driveB", fds[1]);
+    if (fds[0]) {
+        qdev_prop_set_drive(dev, "driveA", fds[0]);
+    }
+    if (fds[1]) {
+        qdev_prop_set_drive(dev, "driveB", fds[1]);
+    }
     qdev_init_nofail(dev);
     sysbus_connect_irq(&sys->busdev, 0, irq);
     sysbus_mmio_map(&sys->busdev, 0, mmio_base);
@@ -1895,7 +1903,9 @@ FDCtrl *sun4m_fdctrl_init(qemu_irq irq, target_phys_addr_t io_base,
     FDCtrl *fdctrl;
 
     dev = qdev_create(NULL, "SUNW,fdtwo");
-    qdev_prop_set_drive(dev, "drive", fds[0]);
+    if (fds[0]) {
+        qdev_prop_set_drive(dev, "drive", fds[0]);
+    }
     qdev_init_nofail(dev);
     sys = DO_UPCAST(FDCtrlSysBus, busdev.qdev, dev);
     fdctrl = &sys->state;
-- 
1.6.6.1