diff mbox series

[v2,3/5] gpiolib: cdev: allocate linereq using kvzalloc()

Message ID 20231221012040.17763-4-warthog618@gmail.com
State Accepted
Commit b718fbfea9df4f715ddd4c61a671226fb11bb232
Headers show
Series gpiolib: cdev: guard tidying | expand

Commit Message

Kent Gibson Dec. 21, 2023, 1:20 a.m. UTC 
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>
---
 drivers/gpio/gpiolib-cdev.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/gpio/gpiolib-cdev.c b/drivers/gpio/gpiolib-cdev.c
index 942fe115b726..5424c878627e 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;