[Qemu-devel] [PATCH for-2.6 v2 10/10] fdc: change auto fallback drive to 288

[John Snow <jsnow@redhat.com>]

The 2.88 drive is more suitable as a default because
it can still read 1.44 images correctly, but the reverse
is not true.

Since there exist virtio-win drivers that are shipped on
2.88 floppy images, this patch will allow VMs booted without
a floppy disk inserted to later insert a 2.88MB floppy and
have that work.

This patch has been tested with msdos, freedos, fedora,
windows 8 and windows 10 without issue: if problems do
arise for certain guests being unable to cope with 2.88MB
drives as the default, they are in the minority and can use
type=144 as needed (or insert a proper boot medium and omit
type=144/288 or use type=auto) to obtain different drive types.

Signed-off-by: John Snow <jsnow@redhat.com>
---
 hw/block/fdc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/block/fdc.c b/hw/block/fdc.c
index 246bd83..a82ddd0 100644
--- a/hw/block/fdc.c
+++ b/hw/block/fdc.c
@@ -79,7 +79,7 @@ typedef struct FDFormat {
  *                       no media is inserted.
  */
 #define FDRIVE_DEFAULT FLOPPY_DRIVE_TYPE_AUTO
-#define FDRIVE_AUTO_FALLBACK FLOPPY_DRIVE_TYPE_144
+#define FDRIVE_AUTO_FALLBACK FLOPPY_DRIVE_TYPE_288
 
 /* In many cases, the total sector size of a format is enough to uniquely
  * identify it. However, there are some total sector collisions between
-- 
2.4.3