NOTE: An applicable subset of this patch was also submitted to upstream
qemu.
SUMMARY:
This patch fixes several bugs in serial.c
(1) A typo in serial_save() where qemu_get_8s is called (should be
qemu_put_8s)
(2) No support provided in serial_load() for version_id == 1 (should
unmarshal
a 1 byte s->divider and should provide a default value for s->fcr
(3) Call serial_ioport_write() to initialize s->fcr. It is not sufficient
to load its value; other hidden values (such as s->recv_fifo.itl) must be
re-initialized.
Signed-off-by: Ben Guthro <bguthro@virtualiron.com
<mailto:bguthro@virtualiron.com>>
Signed-off-by: Robert Phillips <rphillips@virtualiron.com
<mailto:rphillips@virtualiron.com>>
diff -r a81184e1f8ae tools/ioemu/hw/serial.c
--- a/tools/ioemu/hw/serial.c
+++ b/tools/ioemu/hw/serial.c
@@ -708,12 +708,13 @@ static void serial_save(QEMUFile *f, voi
qemu_put_8s(f,&s->lsr);
qemu_put_8s(f,&s->msr);
qemu_put_8s(f,&s->scr);
- qemu_get_8s(f,&s->fcr);
+ qemu_put_8s(f,&s->fcr);
}
static int serial_load(QEMUFile *f, void *opaque, int version_id)
{
SerialState *s = opaque;
+ uint8_t fcr;
if(version_id > 2)
return -EINVAL;
@@ -730,8 +731,13 @@ static int serial_load(QEMUFile *f, void
qemu_get_8s(f,&s->lsr);
qemu_get_8s(f,&s->msr);
qemu_get_8s(f,&s->scr);
- qemu_get_8s(f,&s->fcr);
-
+ if (version_id >= 2)
+ qemu_get_8s(f,&fcr);
+ else
+ fcr = 0; // disable fifos
+
+ /* Initialize fcr via setter to perform essential side-effects */
+ serial_ioport_write(s, 0x02, fcr);
return 0;
}
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