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fdc: fix media detection 

We have to set up 'media_changed' after guest start so floppy driver
could detect that there is no media in drive. For this purpose we call
'fdctrl_change_cb' instead of 'fd_revalidate' in 'fdctrl_connect_drives'.
'fd_revalidate' is called inside 'fdctrl_change_cb'.

We still have to set default drive geometry in 'fd_revalidate' even
if there is no media in drive. When you try to open (windows) or mount (linux)
floppy the driver tries to seek on track 1. Linux guest stuck in loop then
kernel crashes and windows guest prints error message.

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
master
Pavel Hrdina 2012-05-24 11:02:29 +02:00 committed by Kevin Wolf
parent 9ecd394753
commit cfb08fbafc
1 changed files with 8 additions and 6 deletions
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14
hw/fdc.c
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@ -179,12 +179,14 @@ static void fd_revalidate(FDrive *drv)
FDriveRate rate;
FLOPPY_DPRINTF("revalidate\n");
if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) {
if (drv->bs != NULL) {
ro = bdrv_is_read_only(drv->bs);
bdrv_get_floppy_geometry_hint(drv->bs, &nb_heads, &max_track,
&last_sect, drv->drive, &drive, &rate);
if (nb_heads != 0 && max_track != 0 && last_sect != 0) {
FLOPPY_DPRINTF("User defined disk (%d %d %d)",
if (!bdrv_is_inserted(drv->bs)) {
FLOPPY_DPRINTF("No disk in drive\n");
} else if (nb_heads != 0 && max_track != 0 && last_sect != 0) {
FLOPPY_DPRINTF("User defined disk (%d %d %d)\n",
nb_heads - 1, max_track, last_sect);
} else {
FLOPPY_DPRINTF("Floppy disk (%d h %d t %d s) %s\n", nb_heads,
@ -201,7 +203,7 @@ static void fd_revalidate(FDrive *drv)
drv->drive = drive;
drv->media_rate = rate;
} else {
FLOPPY_DPRINTF("No disk in drive\n");
FLOPPY_DPRINTF("No drive connected\n");
drv->last_sect = 0;
drv->max_track = 0;
drv->flags &= ~FDISK_DBL_SIDES;
@ -709,7 +711,7 @@ static void fdctrl_raise_irq(FDCtrl *fdctrl, uint8_t status0)
FDrive *cur_drv;
/* A seek clears the disk change line (if a disk is inserted) */
cur_drv = get_cur_drv(fdctrl);
if (cur_drv->max_track) {
if (cur_drv->bs != NULL && bdrv_is_inserted(cur_drv->bs)) {
cur_drv->media_changed = 0;
}
}
@ -1878,7 +1880,7 @@ static int fdctrl_connect_drives(FDCtrl *fdctrl)
}
fd_init(drive);
fd_revalidate(drive);
fdctrl_change_cb(drive, 0);
if (drive->bs) {
bdrv_set_dev_ops(drive->bs, &fdctrl_block_ops, drive);
}