[PATCH 4/6] vmd: reset i8253 input latch on new counter writes
ssnf <[email protected]>
| Newsgroups | gmane.os.openbsd.tech |
|---|---|
| Message-ID | <[email protected]> |
A new LSB/MSB counter write must replace the previous programmed
value.
The first byte is currently OR'ed into ilatch, leaving bits from
the previous divisor set and potentially programming the wrong
count.
---
usr.sbin/vmd/i8253.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/usr.sbin/vmd/i8253.c b/usr.sbin/vmd/i8253.c
index 917def18b75..3723bcde639 100644
--- a/usr.sbin/vmd/i8253.c
+++ b/usr.sbin/vmd/i8253.c
@@ -287,7 +287,7 @@ vcpu_exit_i8253(struct vm_run_params *vrp)
if (vei->vei.vei_dir == VEI_DIR_OUT) { /* OUT instruction */
if (i8253_channel[sel].last_w == 0) {
- i8253_channel[sel].ilatch |= (out_data & 0xff);
+ i8253_channel[sel].ilatch = out_data & 0xff;
i8253_channel[sel].last_w = 1;
} else {
i8253_channel[sel].ilatch |=
--
2.51.0