Input: synaptics_i2c - replace use of system_wq with system_dfl_wq

Currently if a user enqueues a work item using schedule_delayed_work() the
used wq is "system_wq" (per-cpu wq) while queue_delayed_work() use
WORK_CPU_UNBOUND (used when a cpu is not specified). The same applies to
schedule_work() that is using system_wq and queue_work(), that makes use
again of WORK_CPU_UNBOUND.

This lack of consistency cannot be addressed without refactoring the API.

This patch continues the effort to refactor worqueue APIs, which has begun
with the change introducing new workqueues and a new alloc_workqueue flag:

commit 128ea9f6ccfb ("workqueue: Add system_percpu_wq and system_dfl_wq")
commit 930c2ea566af ("workqueue: Add new WQ_PERCPU flag")

This specific workload do not benefit from a per-cpu workqueue, so use
the default unbound workqueue (system_dfl_wq) instead.

Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Marco Crivellari <marco.crivellari@suse.com>
Link: https://patch.msgid.link/20251106141955.218911-4-marco.crivellari@suse.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/mouse/synaptics_i2c.c b/drivers/input/mouse/synaptics_i2c.c
index a0d707e47d932dd219effbcc88b5054edd30d5f0..c8ddfff2605ffd5ebaef543ddc365bf0dd6a2cde 100644 (file)
--- a/drivers/input/mouse/synaptics_i2c.c
+++ b/drivers/input/mouse/synaptics_i2c.c
@@ -372,7 +372,7 @@ static irqreturn_t synaptics_i2c_irq(int irq, void *dev_id)
 {
        struct synaptics_i2c *touch = dev_id;
 
-       mod_delayed_work(system_wq, &touch->dwork, 0);
+       mod_delayed_work(system_dfl_wq, &touch->dwork, 0);
 
        return IRQ_HANDLED;
 }
@@ -448,7 +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.
         */
-       mod_delayed_work(system_wq, &touch->dwork, delay);
+       mod_delayed_work(system_dfl_wq, &touch->dwork, delay);
 }
 
 static int synaptics_i2c_open(struct input_dev *input)
@@ -461,7 +461,7 @@ static int synaptics_i2c_open(struct input_dev *input)
                return ret;
 
        if (polling_req)
-               mod_delayed_work(system_wq, &touch->dwork,
+               mod_delayed_work(system_dfl_wq, &touch->dwork,
                                msecs_to_jiffies(NO_DATA_SLEEP_MSECS));
 
        return 0;
@@ -620,7 +620,7 @@ static int synaptics_i2c_resume(struct device *dev)
        if (ret)
                return ret;
 
-       mod_delayed_work(system_wq, &touch->dwork,
+       mod_delayed_work(system_dfl_wq, &touch->dwork,
                                msecs_to_jiffies(NO_DATA_SLEEP_MSECS));
 
        return 0;