power: supply: bq27xxx: Fix I2C IRQ race on remove

commit 444ff00734f3878cd54ddd1ed5e2e6dbea9326d5 upstream.

devm_request_threaded_irq() requested IRQs are only free-ed after
the driver's remove function has ran. So the IRQ could trigger and
call bq27xxx_battery_update() after bq27xxx_battery_teardown() has
already run.

Switch to explicitly free-ing the IRQ in bq27xxx_battery_i2c_remove()
to fix this.

Fixes: 2ba575a761cd ("power: bq27xxx_battery: Add interrupt handling support")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/power/supply/bq27xxx_battery_i2c.c b/drivers/power/supply/bq27xxx_battery_i2c.c
index 34229c1f43e31ccd19d203c9aac6301251d47916..01800cd97e3af36351496e631858b01488e2e872 100644 (file)
--- a/drivers/power/supply/bq27xxx_battery_i2c.c
+++ b/drivers/power/supply/bq27xxx_battery_i2c.c
@@ -187,7 +187,7 @@ static int bq27xxx_battery_i2c_probe(struct i2c_client *client,
        i2c_set_clientdata(client, di);
 
        if (client->irq) {
-               ret = devm_request_threaded_irq(&client->dev, client->irq,
+               ret = request_threaded_irq(client->irq,
                                NULL, bq27xxx_battery_irq_handler_thread,
                                IRQF_ONESHOT,
                                di->name, di);
@@ -217,6 +217,7 @@ static int bq27xxx_battery_i2c_remove(struct i2c_client *client)
 {
        struct bq27xxx_device_info *di = i2c_get_clientdata(client);
 
+       free_irq(client->irq, di);
        bq27xxx_battery_teardown(di);
 
        mutex_lock(&battery_mutex);