diff options
Diffstat (limited to 'drivers/hv/hv_balloon.c')
| -rw-r--r-- | drivers/hv/hv_balloon.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c index cb5b7dc9797f..8a725cd69ad7 100644 --- a/drivers/hv/hv_balloon.c +++ b/drivers/hv/hv_balloon.c @@ -567,7 +567,9 @@ static int hv_memory_notifier(struct notifier_block *nb, unsigned long val, case MEM_ONLINE: dm_device.num_pages_onlined += mem->nr_pages; case MEM_CANCEL_ONLINE: - mutex_unlock(&dm_device.ha_region_mutex); + if (val == MEM_ONLINE || + mutex_is_locked(&dm_device.ha_region_mutex)) + mutex_unlock(&dm_device.ha_region_mutex); if (dm_device.ha_waiting) { dm_device.ha_waiting = false; complete(&dm_device.ol_waitevent); |