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staging: cs5535_gpio: check put_user() return code

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put_user() may fail, if so return -EFAULT.

Signed-off-by: Vasiliy Kulikov <segoon@openwall.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Vasiliy Kulikov 2011-01-17 13:08:49 +03:00 committed by Greg Kroah-Hartman
parent 2f644ccfc5
commit 01ebd764da
1 changed files with 2 additions and 1 deletions
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3
drivers/staging/cs5535_gpio/cs5535_gpio.c
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@ -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++;
}