put_user() may fail, if so return -EFAULT.
Signed-off-by: Vasiliy Kulikov <segoon@xxxxxxxxxxxx>
---
Compile tested only.
drivers/staging/cs5535_gpio/cs5535_gpio.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/drivers/staging/cs5535_gpio/cs5535_gpio.c b/drivers/staging/cs5535_gpio/cs5535_gpio.c
index 0cf1e5f..b25f9d1 100644
--- a/drivers/staging/cs5535_gpio/cs5535_gpio.c
+++ b/drivers/staging/cs5535_gpio/cs5535_gpio.c
@@ -146,7 +146,8 @@ static ssize_t cs5535_gpio_read(struct file *file, char __user *buf,
/* add a line-feed if there is room */
if ((i == ARRAY_SIZE(rm)) && (count < len)) {
- put_user('\n', buf + count);
+ if (put_user('\n', buf + count))
+ return -EFAULT;
count++;
}
--
1.7.0.4
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