[Qemu-devel] [PATCH v2] fdc: fix media change detection for windows

[Pavel Hrdina]

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.

We have to also check the 'media_change' bit in the 'fd_seek'. This
internal seek clears the 'media_change' bit, too, if there is
a media inserted.

Signed-off-by: Pavel Hrdina <address@hidden>
---
 hw/fdc.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/hw/fdc.c b/hw/fdc.c
index 30d34e3..2d6dd30 100644
--- a/hw/fdc.c
+++ b/hw/fdc.c
@@ -127,8 +127,13 @@ static int fd_seek(FDrive *drv, uint8_t head, uint8_t 
track, uint8_t sect,
     uint32_t sector;
     int ret;
 
+    if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) {
+        drv->media_changed = 0;
+    }
+
     if (track > drv->max_track ||
-        (head != 0 && (drv->flags & FDISK_DBL_SIDES) == 0)) {
+        (head != 0 && (drv->flags & FDISK_DBL_SIDES) == 0) ||
+        drv->media_changed) {
         FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
                        head, track, sect, 1,
                        (drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1,
-- 
1.7.7.6