diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2023-03-21 16:54:11 +0300 |
|---|---|---|
| committer | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2023-03-29 19:11:12 +0300 |
| commit | 79736429c97f517247645e73e75c956efd09ad03 (patch) | |
| tree | 271f16e1caf6a4cf527fe0748c8f3b3ecb200cc7 /drivers/gpio | |
| parent | 2093bcd872321a5301470978231b23cc121e3476 (diff) | |
| download | linux-79736429c97f517247645e73e75c956efd09ad03.tar.xz | |
gpiolib: Replace open coded krealloc()
gpiod_get_array() does a new allocation in some cases, followed
by copying previously allocated placeholder for the descriptors.
Replace that with krealloc(__GFP_ZERO), since it was kzalloc()
originally.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpiolib.c | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 9451a627dacd..65253dbde03e 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -4277,12 +4277,14 @@ struct gpio_descs *__must_check gpiod_get_array(struct device *dev, struct gpio_array *array_info = NULL; struct gpio_chip *gc; int count, bitmap_size; + size_t descs_size; count = gpiod_count(dev, con_id); if (count < 0) return ERR_PTR(count); - descs = kzalloc(struct_size(descs, desc, count), GFP_KERNEL); + descs_size = struct_size(descs, desc, count); + descs = kzalloc(descs_size, GFP_KERNEL); if (!descs) return ERR_PTR(-ENOMEM); @@ -4306,20 +4308,17 @@ struct gpio_descs *__must_check gpiod_get_array(struct device *dev, bitmap_size = BITS_TO_LONGS(gc->ngpio > count ? gc->ngpio : count); - array = kzalloc(struct_size(descs, desc, count) + - struct_size(array_info, invert_mask, - 3 * bitmap_size), GFP_KERNEL); + array = krealloc(descs, descs_size + + struct_size(array_info, invert_mask, 3 * bitmap_size), + GFP_KERNEL | __GFP_ZERO); if (!array) { gpiod_put_array(descs); return ERR_PTR(-ENOMEM); } - memcpy(array, descs, - struct_size(descs, desc, descs->ndescs + 1)); - kfree(descs); - descs = array; - array_info = (void *)(descs->desc + count); + + array_info = (void *)descs + descs_size; array_info->get_mask = array_info->invert_mask + bitmap_size; array_info->set_mask = array_info->get_mask + |