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| author | Sven Van Asbroeck <TheSven73@gmail.com> | 2019-02-11 14:15:54 -0800 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2019-02-16 21:39:42 -0800 |
| commit | bab4a6cca024dc202b1e893edbe34f58f1d43f3e (patch) | |
| tree | 59f04d942adf96534195a5b48db8a6fae3b341f7 | |
| parent | 16ab4f43eb953277e915115c1d811d2a518d6bf2 (diff) | |
| download | linux-bab4a6cca024dc202b1e893edbe34f58f1d43f3e.tar.gz | |
Input: qt2160 - remove redundant spinlock
Remove a spinlock which prevents schedule_delayed_work() and
mod_delayed_work() from executing concurrently.
This was required back when mod_delayed_work() did not exist,
and had to be implemented with a cancel + schedule. See
commit e7c2f967445d ("workqueue: use mod_delayed_work() instead of
__cancel + queue")
schedule_delayed_work() and mod_delayed_work() can now be used
concurrently. So the spinlock is no longer needed.
Signed-off-by: Sven Van Asbroeck <TheSven73@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
| -rw-r--r-- | drivers/input/keyboard/qt2160.c | 9 |
1 files changed, 0 insertions, 9 deletions
diff --git a/drivers/input/keyboard/qt2160.c b/drivers/input/keyboard/qt2160.c index 43b86482dda0..23dc7c0c7d78 100644 --- a/drivers/input/keyboard/qt2160.c +++ b/drivers/input/keyboard/qt2160.c @@ -69,7 +69,6 @@ struct qt2160_data { struct i2c_client *client; struct input_dev *input; struct delayed_work dwork; - spinlock_t lock; /* Protects canceling/rescheduling of dwork */ unsigned short keycodes[ARRAY_SIZE(qt2160_key2code)]; u16 key_matrix; #ifdef CONFIG_LEDS_CLASS @@ -221,22 +220,15 @@ static int qt2160_get_key_matrix(struct qt2160_data *qt2160) static irqreturn_t qt2160_irq(int irq, void *_qt2160) { struct qt2160_data *qt2160 = _qt2160; - unsigned long flags; - - spin_lock_irqsave(&qt2160->lock, flags); mod_delayed_work(system_wq, &qt2160->dwork, 0); - spin_unlock_irqrestore(&qt2160->lock, flags); - return IRQ_HANDLED; } static void qt2160_schedule_read(struct qt2160_data *qt2160) { - spin_lock_irq(&qt2160->lock); schedule_delayed_work(&qt2160->dwork, QT2160_CYCLE_INTERVAL); - spin_unlock_irq(&qt2160->lock); } static void qt2160_worker(struct work_struct *work) @@ -406,7 +398,6 @@ static int qt2160_probe(struct i2c_client *client, qt2160->client = client; qt2160->input = input; INIT_DELAYED_WORK(&qt2160->dwork, qt2160_worker); - spin_lock_init(&qt2160->lock); input->name = "AT42QT2160 Touch Sense Keyboard"; input->id.bustype = BUS_I2C; |