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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2022-07-12 12:08:36 +0200
committerPavel Machek <pavel@ucw.cz>2022-08-02 16:43:31 +0200
commite1af5c8155867e6773474649c76e5c68940008d5 (patch)
treed777e38296dcff67e32d7de55d3da8f1295caf47 /drivers/leds
parentleds: is31fl319x: Make use of dev_err_probe() (diff)
downloadlinux-e1af5c8155867e6773474649c76e5c68940008d5.tar.xz
linux-e1af5c8155867e6773474649c76e5c68940008d5.zip
leds: is31fl319x: Fix devm vs. non-devm ordering
When non-devm resources are allocated they mustn't be followed by devm allocations, otherwise it will break the tear down ordering and might lead to crashes or other bugs during ->remove() stage. Fix this by wrapping mutex_destroy() call with devm_add_action_or_reset(). Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vincent Knecht <vincent.knecht@mailoo.org> Signed-off-by: Pavel Machek <pavel@ucw.cz>
Diffstat (limited to 'drivers/leds')
-rw-r--r--drivers/leds/leds-is31fl319x.c32
1 files changed, 9 insertions, 23 deletions
diff --git a/drivers/leds/leds-is31fl319x.c b/drivers/leds/leds-is31fl319x.c
index d9cf70505c43..233ed67830a3 100644
--- a/drivers/leds/leds-is31fl319x.c
+++ b/drivers/leds/leds-is31fl319x.c
@@ -511,10 +511,13 @@ static int is31fl319x_probe(struct i2c_client *client,
return -ENOMEM;
mutex_init(&is31->lock);
+ err = devm_add_action(dev, (void (*)(void *))mutex_destroy, &is31->lock);
+ if (err)
+ return err;
err = is31fl319x_parse_fw(&client->dev, is31);
if (err)
- goto free_mutex;
+ return err;
if (is31->shutdown_gpio) {
gpiod_direction_output(is31->shutdown_gpio, 0);
@@ -524,19 +527,15 @@ static int is31fl319x_probe(struct i2c_client *client,
is31->client = client;
is31->regmap = devm_regmap_init_i2c(client, is31->cdef->is31fl319x_regmap_config);
- if (IS_ERR(is31->regmap)) {
- err = dev_err_probe(dev, PTR_ERR(is31->regmap), "failed to allocate register map\n");
- goto free_mutex;
- }
+ if (IS_ERR(is31->regmap))
+ return dev_err_probe(dev, PTR_ERR(is31->regmap), "failed to allocate register map\n");
i2c_set_clientdata(client, is31);
/* check for write-reply from chip (we can't read any registers) */
err = regmap_write(is31->regmap, is31->cdef->reset_reg, 0x00);
- if (err < 0) {
- err = dev_err_probe(dev, err, "no response from chip write\n");
- goto free_mutex;
- }
+ if (err < 0)
+ return dev_err_probe(dev, err, "no response from chip write\n");
/*
* Kernel conventions require per-LED led-max-microamp property.
@@ -568,22 +567,10 @@ static int is31fl319x_probe(struct i2c_client *client,
err = devm_led_classdev_register(&client->dev, &led->cdev);
if (err < 0)
- goto free_mutex;
+ return err;
}
return 0;
-
-free_mutex:
- mutex_destroy(&is31->lock);
- return err;
-}
-
-static int is31fl319x_remove(struct i2c_client *client)
-{
- struct is31fl319x_chip *is31 = i2c_get_clientdata(client);
-
- mutex_destroy(&is31->lock);
- return 0;
}
/*
@@ -611,7 +598,6 @@ static struct i2c_driver is31fl319x_driver = {
.of_match_table = of_is31fl319x_match,
},
.probe = is31fl319x_probe,
- .remove = is31fl319x_remove,
.id_table = is31fl319x_id,
};