diff options
| author | Johan Hovold <johan@kernel.org> | 2015-01-13 13:00:04 +0100 |
|---|---|---|
| committer | Luis Henriques <luis.henriques@canonical.com> | 2015-02-04 10:57:24 +0000 |
| commit | b3ab45dccc8fcb30ca6f700a8292c08a59c08538 (patch) | |
| tree | bcfada031079e4558eb9a4946028b3a12e2354c6 | |
| parent | 601255c093bba6b25ebd923ccf9783928acaad6e (diff) | |
| download | linux-stable-b3ab45dccc8fcb30ca6f700a8292c08a59c08538.tar.gz linux-stable-b3ab45dccc8fcb30ca6f700a8292c08a59c08538.tar.bz2 linux-stable-b3ab45dccc8fcb30ca6f700a8292c08a59c08538.zip | |
gpio: sysfs: fix gpio-chip device-attribute leak
commit 121b6a79955a3a3fd7bbb9b8cb88d5b9dad6283d upstream.
The gpio-chip device attributes were never destroyed when the device was
removed.
Fix by using device_create_with_groups() to create the device attributes
of the chip class device.
Note that this also fixes the attribute-creation race with userspace.
Fixes: d8f388d8dc8d ("gpio: sysfs interface")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
[ luis: backported to 3.16:
- file rename: drivers/gpio/gpiolib-sysfs.c -> drivers/gpio/gpiolib.c ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
| -rw-r--r-- | drivers/gpio/gpiolib.c | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index f3414d09267d..163dcf7285ba 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -681,16 +681,13 @@ static ssize_t chip_ngpio_show(struct device *dev, } static DEVICE_ATTR(ngpio, 0444, chip_ngpio_show, NULL); -static const struct attribute *gpiochip_attrs[] = { +static struct attribute *gpiochip_attrs[] = { &dev_attr_base.attr, &dev_attr_label.attr, &dev_attr_ngpio.attr, NULL, }; - -static const struct attribute_group gpiochip_attr_group = { - .attrs = (struct attribute **) gpiochip_attrs, -}; +ATTRIBUTE_GROUPS(gpiochip); /* * /sys/class/gpio/export ... write-only @@ -1031,13 +1028,13 @@ static int gpiochip_export(struct gpio_chip *chip) /* use chip->base for the ID; it's already known to be unique */ mutex_lock(&sysfs_lock); - dev = device_create(&gpio_class, chip->dev, MKDEV(0, 0), chip, - "gpiochip%d", chip->base); - if (!IS_ERR(dev)) { - status = sysfs_create_group(&dev->kobj, - &gpiochip_attr_group); - } else + dev = device_create_with_groups(&gpio_class, chip->dev, MKDEV(0, 0), + chip, gpiochip_groups, + "gpiochip%d", chip->base); + if (IS_ERR(dev)) status = PTR_ERR(dev); + else + status = 0; chip->exported = (status == 0); mutex_unlock(&sysfs_lock); |