From: Kent Gibson <warthog618@gmail.com>
Date: Thu, 21 Dec 2023 01:20:38 +0000 (+0800)
Subject: gpiolib: cdev: allocate linereq using kvzalloc()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=b718fbfea9df4f715ddd4c61a671226fb11bb232;p=linux.git

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: Kent Gibson <warthog618@gmail.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---

diff --git a/drivers/gpio/gpiolib-cdev.c b/drivers/gpio/gpiolib-cdev.c
index 942fe115b7265..5424c878627ef 100644
--- a/drivers/gpio/gpiolib-cdev.c
+++ b/drivers/gpio/gpiolib-cdev.c
@@ -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;