In this driver LEDs are registered using devm_led_classdev_register()
so they are automatically unregistered after module's remove() is done.
led_classdev_unregister() calls module's led_set_brightness() to turn off
the LEDs and that callback uses resources which were destroyed already
in module's remove() so use devm API instead of remove().
Signed-off-by: George Stark <gnstark@xxxxxxxxxxxxxxxxx>
---
drivers/leds/leds-aw200xx.c | 36 +++++++++++++++++++++++++-----------
1 file changed, 25 insertions(+), 11 deletions(-)
diff --git a/drivers/leds/leds-aw200xx.c b/drivers/leds/leds-aw200xx.c
index 1d3943f86f7f..b1a097c7c879 100644
--- a/drivers/leds/leds-aw200xx.c
+++ b/drivers/leds/leds-aw200xx.c
@@ -10,6 +10,7 @@
#include <linux/bitfield.h>
#include <linux/bits.h>
#include <linux/container_of.h>
+#include <linux/devm-helpers.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/leds.h>
@@ -530,6 +531,20 @@ static const struct regmap_config aw200xx_regmap_config = {
.disable_locking = true,
};
+static void aw200xx_chip_reset_action(void *data)
+{
+ const struct aw200xx *chip = (struct aw200xx *)data;
+
+ aw200xx_chip_reset(chip);
+}
+
+static void aw200xx_disable_action(void *data)
+{
+ const struct aw200xx *chip = (struct aw200xx *)data;
+
+ aw200xx_disable(chip);
+}
+
static int aw200xx_probe(struct i2c_client *client)
{
const struct aw200xx_chipdef *cdef;
@@ -568,11 +583,16 @@ static int aw200xx_probe(struct i2c_client *client)
aw200xx_enable(chip);
+ ret = devm_add_action(&client->dev, aw200xx_disable_action, chip);
+ if (ret)
+ return ret;
+
ret = aw200xx_chip_check(chip);
if (ret)
return ret;
- mutex_init(&chip->mutex);
+ if (devm_mutex_init(&client->dev, &chip->mutex))
+ return -ENOMEM;
/* Need a lock now since after call aw200xx_probe_fw, sysfs nodes created */
mutex_lock(&chip->mutex);
@@ -581,6 +601,10 @@ static int aw200xx_probe(struct i2c_client *client)
if (ret)
goto out_unlock;
+ ret = devm_add_action(&client->dev, aw200xx_chip_reset_action, chip);
+ if (ret)
+ goto out_unlock;
+
ret = aw200xx_probe_fw(&client->dev, chip);
if (ret)
goto out_unlock;
@@ -595,15 +619,6 @@ static int aw200xx_probe(struct i2c_client *client)
return ret;
}
-static void aw200xx_remove(struct i2c_client *client)
-{
- struct aw200xx *chip = i2c_get_clientdata(client);
-
- aw200xx_chip_reset(chip);
- aw200xx_disable(chip);
- mutex_destroy(&chip->mutex);
-}
-
static const struct aw200xx_chipdef aw20036_cdef = {
.channels = 36,
.display_size_rows_max = 3,
@@ -652,7 +667,6 @@ static struct i2c_driver aw200xx_driver = {
.of_match_table = aw200xx_match_table,
},
.probe_new = aw200xx_probe,
- .remove = aw200xx_remove,
.id_table = aw200xx_id,
};
module_i2c_driver(aw200xx_driver);
--
2.38.4
