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Subject[PATCH v2 3/5] gpiolib: cdev: allocate linereq using kvzalloc()
Date
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 --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;
--
2.39.2

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