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gpio: sysfs: fix gpio-chip device-attribute leak

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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: d8f388d8dc ("gpio: sysfs interface")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2015-01-13 13:00:04 +01:00 committed by Greg Kroah-Hartman
parent 5d53369ea5
commit aa35a48704
1 changed files with 3 additions and 2 deletions
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5
drivers/gpio/gpiolib.c
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@ -627,7 +627,7 @@ 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,
@ -635,7 +635,7 @@ static const struct attribute *gpiochip_attrs[] = {
};
static const struct attribute_group gpiochip_attr_group = {
.attrs = (struct attribute **) gpiochip_attrs,
.attrs = gpiochip_attrs,
};
/*
@ -1036,6 +1036,7 @@ static void gpiochip_unexport(struct gpio_chip *chip)
mutex_lock(&sysfs_lock);
dev = class_find_device(&gpio_class, NULL, chip, match_export);
if (dev) {
sysfs_remove_group(&dev->kobj, &gpiochip_attr_group);
put_device(dev);
device_unregister(dev);
chip->exported = 0;