Commit b718fbfe authored by Kent Gibson's avatar Kent Gibson Committed by Bartosz Golaszewski
Browse files

gpiolib: cdev: allocate linereq using kvzalloc() 



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: default avatarKent Gibson <warthog618@gmail.com>
Signed-off-by: default avatarBartosz Golaszewski <bartosz.golaszewski@linaro.org>
parent ede7511e

drivers/gpio/gpiolib-cdev.c

+2 −2
Original line number Diff line number Diff line
@@ -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;