diff options
Diffstat (limited to 'drivers/hv/hv_util.c')
| -rw-r--r-- | drivers/hv/hv_util.c | 20 |
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 |