fdc: fix implied seek while there is no media in drive

The Windows uses 'READ' command at the start of an instalation
without checking the 'dir' register. We have to abort the transfer
with an abnormal termination if there is no media in the drive.

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit c52acf60b6c12ff5eb58eb6ac568c159ae0c8737)

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/hw/fdc.c b/hw/fdc.c
index 30d34e3f1..be3520112 100644
--- a/hw/fdc.c
+++ b/hw/fdc.c
@@ -159,6 +159,10 @@ static int fd_seek(FDrive *drv, uint8_t head, uint8_t track, uint8_t sect,
         drv->sect = sect;
     }
 
+    if (drv->bs == NULL || !bdrv_is_inserted(drv->bs)) {
+        ret = 2;
+    }
+
     return ret;
 }