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gpiolib: cdev: allocate linereq using kvzalloc()

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The size of struct linereq may exceed a page, so allocate space for
it using kvzalloc() instead of kzalloc() to handle the case where
memory is heavily fragmented and kzalloc() cannot find a sufficient
contiguous region.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
This commit is contained in:
Kent Gibson 2023-12-21 09:20:38 +08:00 committed by Bartosz Golaszewski
parent ede7511e7c
commit b718fbfea9
1 changed files with 2 additions and 2 deletions
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4
drivers/gpio/gpiolib-cdev.c
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@ -1723,7 +1723,7 @@ static void linereq_free(struct linereq *lr)
kfifo_free(&lr->events);
kfree(lr->label);
gpio_device_put(lr->gdev);
kfree(lr);
kvfree(lr);
}
static int linereq_release(struct inode *inode, struct file *file)
@ -1788,7 +1788,7 @@ static int linereq_create(struct gpio_device *gdev, void __user *ip)
if (ret)
return ret;
lr = kzalloc(struct_size(lr, lines, ulr.num_lines), GFP_KERNEL);
lr = kvzalloc(struct_size(lr, lines, ulr.num_lines), GFP_KERNEL);
if (!lr)
return -ENOMEM;
lr->num_lines = ulr.num_lines;