diff options
| -rw-r--r-- | drivers/devfreq/governor_bw_hwmon.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/devfreq/governor_bw_hwmon.c b/drivers/devfreq/governor_bw_hwmon.c index b997e79e3d73..972de02ca549 100644 --- a/drivers/devfreq/governor_bw_hwmon.c +++ b/drivers/devfreq/governor_bw_hwmon.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2013-2016, The Linux Foundation. All rights reserved. + * Copyright (c) 2013-2017, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -86,6 +86,8 @@ static DEFINE_SPINLOCK(irq_lock); static LIST_HEAD(hwmon_list); static DEFINE_MUTEX(list_lock); +static DEFINE_MUTEX(sync_lock); + static int use_cnt; static DEFINE_MUTEX(state_lock); @@ -846,6 +848,7 @@ static int devfreq_bw_hwmon_ev_handler(struct devfreq *df, break; case DEVFREQ_GOV_INTERVAL: + mutex_lock(&sync_lock); sample_ms = *(unsigned int *)data; sample_ms = max(MIN_MS, sample_ms); sample_ms = min(MAX_MS, sample_ms); @@ -865,6 +868,7 @@ static int devfreq_bw_hwmon_ev_handler(struct devfreq *df, "Unable to resume HW monitor (%d)\n", ret); return ret; } + mutex_unlock(&sync_lock); break; case DEVFREQ_GOV_SUSPEND: |