Input: synaptics_i2c - remove redundant spinlock

Remove a leftover spinlock.

This was required back when mod_delayed_work() did not exist, and had to
be implemented with a cancel + queue. 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>

1 files changed, 4 insertions, 18 deletions

diff --git a/drivers/input/mouse/synaptics_i2c.c b/drivers/input/mouse/synaptics_i2c.c
index 8538318d332c..fa304648d611 100644
--- a/drivers/input/mouse/synaptics_i2c.c
+++ b/drivers/input/mouse/synaptics_i2c.c
@@ -219,7 +219,6 @@ struct synaptics_i2c {
         struct i2c_client       *client;
         struct input_dev        *input;
         struct delayed_work     dwork;
-        spinlock_t              lock;
         int                     no_data_count;
         int                     no_decel_param;
         int                     reduce_report_param;
@@ -369,23 +368,11 @@ static bool synaptics_i2c_get_input(struct synaptics_i2c *touch)
         return xy_delta || gesture;
 }
 
-static void synaptics_i2c_reschedule_work(struct synaptics_i2c *touch,
-                                          unsigned long delay)
-{
-        unsigned long flags;
-
-        spin_lock_irqsave(&touch->lock, flags);
-
-        mod_delayed_work(system_wq, &touch->dwork, delay);
-
-        spin_unlock_irqrestore(&touch->lock, flags);
-}
-
 static irqreturn_t synaptics_i2c_irq(int irq, void *dev_id)
 {
         struct synaptics_i2c *touch = dev_id;
 
-        synaptics_i2c_reschedule_work(touch, 0);
+        mod_delayed_work(system_wq, &touch->dwork, 0);
 
         return IRQ_HANDLED;
 }
@@ -461,7 +448,7 @@ static void synaptics_i2c_work_handler(struct work_struct *work)
          * We poll the device once in THREAD_IRQ_SLEEP_SECS and
          * if error is detected, we try to reset and reconfigure the touchpad.
          */
-        synaptics_i2c_reschedule_work(touch, delay);
+        mod_delayed_work(system_wq, &touch->dwork, delay);
 }
 
 static int synaptics_i2c_open(struct input_dev *input)
@@ -474,7 +461,7 @@ static int synaptics_i2c_open(struct input_dev *input)
                 return ret;
 
         if (polling_req)
-                synaptics_i2c_reschedule_work(touch,
+                mod_delayed_work(system_wq, &touch->dwork,
                                 msecs_to_jiffies(NO_DATA_SLEEP_MSECS));
 
         return 0;
@@ -530,7 +517,6 @@ static struct synaptics_i2c *synaptics_i2c_touch_create(struct i2c_client *clien
         touch->scan_rate_param = scan_rate;
         set_scan_rate(touch, scan_rate);
         INIT_DELAYED_WORK(&touch->dwork, synaptics_i2c_work_handler);
-        spin_lock_init(&touch->lock);
 
         return touch;
 }
@@ -637,7 +623,7 @@ static int __maybe_unused synaptics_i2c_resume(struct device *dev)
         if (ret)
                 return ret;
 
-        synaptics_i2c_reschedule_work(touch,
+        mod_delayed_work(system_wq, &touch->dwork,
                                 msecs_to_jiffies(NO_DATA_SLEEP_MSECS));
 
         return 0;