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Diffstat (limited to 'drivers/hv/hv_util.c')
-rw-r--r--drivers/hv/hv_util.c20
1 files changed, 7 insertions, 13 deletions
diff --git a/drivers/hv/hv_util.c b/drivers/hv/hv_util.c
index b27a8ee3de57..4002b717c777 100644
--- a/drivers/hv/hv_util.c
+++ b/drivers/hv/hv_util.c
@@ -198,29 +198,23 @@ static void hv_set_host_time(struct work_struct *work)
* ICTIMESYNCFLAG_SYNC flag bit indicates reboot, restore events of the VM.
* After reboot the flag ICTIMESYNCFLAG_SYNC is included in the first time
* message after the timesync channel is opened. Since the hv_utils module is
- * loaded after hv_vmbus, the first message is usually missed. The other
- * thing is, systime is automatically set to emulated hardware clock which may
- * not be UTC time or in the same time zone. So, to override these effects, we
- * use the first 50 time samples for initial system time setting.
+ * loaded after hv_vmbus, the first message is usually missed. This bit is
+ * considered a hard request to discipline the clock.
+ *
+ * ICTIMESYNCFLAG_SAMPLE bit indicates a time sample from host. This is
+ * typically used as a hint to the guest. The guest is under no obligation
+ * to discipline the clock.
*/
static inline void adj_guesttime(u64 hosttime, u8 flags)
{
struct adj_time_work *wrk;
- static s32 scnt = 50;
wrk = kmalloc(sizeof(struct adj_time_work), GFP_ATOMIC);
if (wrk == NULL)
return;
wrk->host_time = hosttime;
- if ((flags & ICTIMESYNCFLAG_SYNC) != 0) {
- INIT_WORK(&wrk->work, hv_set_host_time);
- schedule_work(&wrk->work);
- return;
- }
-
- if ((flags & ICTIMESYNCFLAG_SAMPLE) != 0 && scnt > 0) {
- scnt--;
+ if ((flags & (ICTIMESYNCFLAG_SYNC | ICTIMESYNCFLAG_SAMPLE)) != 0) {
INIT_WORK(&wrk->work, hv_set_host_time);
schedule_work(&wrk->work);
} else