diff options
| author | Bartosz Golaszewski <brgl@bgdev.pl> | 2017-12-14 15:29:20 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2017-12-20 09:16:39 +0100 |
| commit | fcf273e5807976009dbb5ffb00bd5b9091843fe6 (patch) | |
| tree | bf5d05ee0bbd17904fc7efa59cfe45068e914df6 /drivers/gpio/gpiolib.c | |
| parent | gpiolib: constify label in gpio_device (diff) | |
| download | linux-fcf273e5807976009dbb5ffb00bd5b9091843fe6.tar.xz linux-fcf273e5807976009dbb5ffb00bd5b9091843fe6.zip | |
gpiolib: use kstrdup_const() for gpio_device label
Users often pass a pointer to a static string to gpiochip_add_data()
family of functions. Avoid unnecessary memory allocations with the
provided helper routine.
While at it: use a ternary operator instead of an if else for brevity.
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to '')
| -rw-r--r-- | drivers/gpio/gpiolib.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 56eec094184c..e9ec44ffaaaf 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1062,7 +1062,7 @@ static void gpiodevice_release(struct device *dev) list_del(&gdev->list); ida_simple_remove(&gpio_ida, gdev->id); - kfree(gdev->label); + kfree_const(gdev->label); kfree(gdev->descs); kfree(gdev); } @@ -1170,10 +1170,7 @@ int gpiochip_add_data_with_key(struct gpio_chip *chip, void *data, goto err_free_descs; } - if (chip->label) - gdev->label = kstrdup(chip->label, GFP_KERNEL); - else - gdev->label = kstrdup("unknown", GFP_KERNEL); + gdev->label = kstrdup_const(chip->label ?: "unknown", GFP_KERNEL); if (!gdev->label) { status = -ENOMEM; goto err_free_descs; @@ -1294,7 +1291,7 @@ err_remove_from_list: list_del(&gdev->list); spin_unlock_irqrestore(&gpio_lock, flags); err_free_label: - kfree(gdev->label); + kfree_const(gdev->label); err_free_descs: kfree(gdev->descs); err_free_gdev: |