[PATCH] fdc: fix floppy boot for Red Hat Linux 5.2

[John Snow <jsnow@redhat.com>]

The image size indicates it's an 81 track floppy disk image, which we
don't have a listing for in the geometry table. When you force the drive
type to 1.44MB, it guesses the reasonably close 18/80. When the drive
type is allowed to auto-detect or set to 2.88, it guesses a very
incorrect geometry.

auto, 144 and 288 drive types get the right geometry with the new entry
in the table.

Reported-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: John Snow <jsnow@redhat.com>
---
 hw/block/fdc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/block/fdc.c b/hw/block/fdc.c
index 198940e737..b2f26ba587 100644
--- a/hw/block/fdc.c
+++ b/hw/block/fdc.c
@@ -122,6 +122,7 @@ static const FDFormat fd_formats[] = {
     /* First entry is default format */
     /* 1.44 MB 3"1/2 floppy disks */
     { FLOPPY_DRIVE_TYPE_144, 18, 80, 1, FDRIVE_RATE_500K, }, /* 3.5" 2880 */
+    { FLOPPY_DRIVE_TYPE_144, 18, 81, 1, FDRIVE_RATE_500K, },
     { FLOPPY_DRIVE_TYPE_144, 20, 80, 1, FDRIVE_RATE_500K, }, /* 3.5" 3200 */
     { FLOPPY_DRIVE_TYPE_144, 21, 80, 1, FDRIVE_RATE_500K, },
     { FLOPPY_DRIVE_TYPE_144, 21, 82, 1, FDRIVE_RATE_500K, },
-- 
2.29.2