rtc: rx8025: Convert to threaded IRQ

The driver currently emulates the concept of threaded IRQ using a
workqueue, switch to threaded IRQ instead.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

1 files changed, 4 insertions, 33 deletions

diff --git a/drivers/rtc/rtc-rx8025.c b/drivers/rtc/rtc-rx8025.c
index a943e1c08263..d8737713135d 100644
--- a/drivers/rtc/rtc-rx8025.c
+++ b/drivers/rtc/rtc-rx8025.c
@@ -71,9 +71,7 @@ MODULE_DEVICE_TABLE(i2c, rx8025_id);
 struct rx8025_data {
         struct i2c_client *client;
         struct rtc_device *rtc;
-        struct work_struct work;
         u8 ctrl1;
-        unsigned exiting:1;
 };
 
 static int rx8025_read_reg(struct i2c_client *client, int number, u8 *value)
@@ -128,26 +126,12 @@ static int rx8025_write_regs(struct i2c_client *client,
         return ret;
 }
 
-static irqreturn_t rx8025_irq(int irq, void *dev_id)
+static irqreturn_t rx8025_handle_irq(int irq, void *dev_id)
 {
         struct i2c_client *client = dev_id;
         struct rx8025_data *rx8025 = i2c_get_clientdata(client);
-
-        disable_irq_nosync(irq);
-        schedule_work(&rx8025->work);
-        return IRQ_HANDLED;
-}
-
-static void rx8025_work(struct work_struct *work)
-{
-        struct rx8025_data *rx8025 = container_of(work, struct rx8025_data,
-                                                  work);
-        struct i2c_client *client = rx8025->client;
-        struct mutex *lock = &rx8025->rtc->ops_lock;
         u8 status;
 
-        mutex_lock(lock);
-
         if (rx8025_read_reg(client, RX8025_REG_CTRL2, &status))
                 goto out;
 
@@ -175,10 +159,7 @@ static void rx8025_work(struct work_struct *work)
                          status | RX8025_BIT_CTRL2_XST);
 
 out:
-        if (!rx8025->exiting)
-                enable_irq(client->irq);
-
-        mutex_unlock(lock);
+        return IRQ_HANDLED;
 }
 
 static int rx8025_get_time(struct device *dev, struct rtc_time *dt)
@@ -550,7 +531,6 @@ static int rx8025_probe(struct i2c_client *client,
 
         rx8025->client = client;
         i2c_set_clientdata(client, rx8025);
-        INIT_WORK(&rx8025->work, rx8025_work);
 
         err = rx8025_init_client(client, &need_reset);
         if (err)
@@ -574,7 +554,7 @@ static int rx8025_probe(struct i2c_client *client,
 
         if (client->irq > 0) {
                 dev_info(&client->dev, "IRQ %d supplied\n", client->irq);
-                err = request_irq(client->irq, rx8025_irq,
+                err = request_threaded_irq(client->irq, NULL, rx8025_handle_irq,
                                   0, "rx8025", client);
                 if (err) {
                         dev_err(&client->dev, "unable to request IRQ\n");
@@ -602,17 +582,8 @@ errout:
 
 static int rx8025_remove(struct i2c_client *client)
 {
-        struct rx8025_data *rx8025 = i2c_get_clientdata(client);
-        struct mutex *lock = &rx8025->rtc->ops_lock;
-
-        if (client->irq > 0) {
-                mutex_lock(lock);
-                rx8025->exiting = 1;
-                mutex_unlock(lock);
-
+        if (client->irq > 0)
                 free_irq(client->irq, client);
-                cancel_work_sync(&rx8025->work);
-        }
 
         rx8025_sysfs_unregister(&client->dev);
         return 0;