haraldwolff/qemu-patch-raspberry4
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fdc: Drop broken code for user-defined floppy geometry

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bdrv_get_floppy_geometry_hint() fails to store through its parameter
drive when bs has a geometry hint.  Makes fd_revalidate() assign
random crap to drv->drive.

Has been broken that way for ages.  Harmless, because:

* The only way to set a geometry hint is -drive if=none,cyls=...
  Since commit c219331e, probably unintentional.

* The only use of drv->drive is as argument to another
  bdrv_get_floppy_geometry_hint().  Which doesn't use it, since the
  geometry hint is still there.

Drop the broken code, ignore -drive parameter cyls, heads and secs for
floppies even with if=none, just like before commit c219331e.  Matches
-help, which explains cyls, heads, secs as "hard disk physical
geometry".

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Markus Armbruster 2012-06-29 17:34:23 +02:00 committed by Kevin Wolf
parent b3ce604eea
commit 1f69c2b022
2 changed files with 28 additions and 37 deletions
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62
block.c
View file

@ -2337,46 +2337,40 @@ void bdrv_get_floppy_geometry_hint(BlockDriverState *bs, int *nb_heads,
uint64_t nb_sectors, size;
int i, first_match, match;
bdrv_get_geometry_hint(bs, nb_heads, max_track, last_sect);
if (*nb_heads != 0 && *max_track != 0 && *last_sect != 0) {
/* User defined disk */
*rate = FDRIVE_RATE_500K;
} else {
bdrv_get_geometry(bs, &nb_sectors);
match = -1;
first_match = -1;
for (i = 0; ; i++) {
parse = &fd_formats[i];
if (parse->drive == FDRIVE_DRV_NONE) {
bdrv_get_geometry(bs, &nb_sectors);
match = -1;
first_match = -1;
for (i = 0; ; i++) {
parse = &fd_formats[i];
if (parse->drive == FDRIVE_DRV_NONE) {
break;
}
if (drive_in == parse->drive ||
drive_in == FDRIVE_DRV_NONE) {
size = (parse->max_head + 1) * parse->max_track *
parse->last_sect;
if (nb_sectors == size) {
match = i;
break;
}
if (drive_in == parse->drive ||
drive_in == FDRIVE_DRV_NONE) {
size = (parse->max_head + 1) * parse->max_track *
parse->last_sect;
if (nb_sectors == size) {
match = i;
break;
}
if (first_match == -1) {
first_match = i;
}
}
}
if (match == -1) {
if (first_match == -1) {
match = 1;
} else {
match = first_match;
first_match = i;
}
parse = &fd_formats[match];
}
*nb_heads = parse->max_head + 1;
*max_track = parse->max_track;
*last_sect = parse->last_sect;
*drive = parse->drive;
*rate = parse->rate;
}
if (match == -1) {
if (first_match == -1) {
match = 1;
} else {
match = first_match;
}
parse = &fd_formats[match];
}
*nb_heads = parse->max_head + 1;
*max_track = parse->max_track;
*last_sect = parse->last_sect;
*drive = parse->drive;
*rate = parse->rate;
}
int bdrv_get_translation_hint(BlockDriverState *bs)

3
hw/fdc.c
View file

@ -191,9 +191,6 @@ static void fd_revalidate(FDrive *drv)
&last_sect, drv->drive, &drive, &rate);
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,
max_track, last_sect, ro ? "ro" : "rw");