diff options
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/touchscreen/tsc2005.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/input/touchscreen/tsc2005.c b/drivers/input/touchscreen/tsc2005.c index 2a9a7260fe8e..cbf0ff322676 100644 --- a/drivers/input/touchscreen/tsc2005.c +++ b/drivers/input/touchscreen/tsc2005.c @@ -477,7 +477,14 @@ static void tsc2005_esd_work(struct work_struct *work) int error; u16 r; - mutex_lock(&ts->mutex); + if (!mutex_trylock(&ts->mutex)) { + /* + * If the mutex is taken, it means that disable or enable is in + * progress. In that case just reschedule the work. If the work + * is not needed, it will be canceled by disable. + */ + goto reschedule; + } if (time_is_after_jiffies(ts->last_valid_interrupt + msecs_to_jiffies(ts->esd_timeout))) @@ -510,11 +517,12 @@ static void tsc2005_esd_work(struct work_struct *work) tsc2005_start_scan(ts); out: + mutex_unlock(&ts->mutex); +reschedule: /* re-arm the watchdog */ schedule_delayed_work(&ts->esd_work, round_jiffies_relative( msecs_to_jiffies(ts->esd_timeout))); - mutex_unlock(&ts->mutex); } static int tsc2005_open(struct input_dev *input) |