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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2017-02-15 02:02:06 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2017-03-06 14:35:21 +0100 |
| commit | fa6256db033067b57318decdc1c583512a1f8f68 (patch) | |
| tree | c0d0cbce48775859ff1800c2b0a3ca301e5eb13a /drivers/gpio | |
| parent | 9ce9f7999741f342eeffd036ab09213a2fa93040 (diff) | |
| download | linux-stable-fa6256db033067b57318decdc1c583512a1f8f68.tar.gz linux-stable-fa6256db033067b57318decdc1c583512a1f8f68.tar.bz2 linux-stable-fa6256db033067b57318decdc1c583512a1f8f68.zip | |
gpio: mockup: return -EFAULT if copy_from_user() fails
copy_from_user() returns the number of bytes remaining to be copied but
we want to return negative error codes on failue.
Fixes: 9202ba2397d1 ("gpio: mockup: implement event injecting over debugfs")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-mockup.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/gpio/gpio-mockup.c b/drivers/gpio/gpio-mockup.c index 06dac72cb69c..d99338689213 100644 --- a/drivers/gpio/gpio-mockup.c +++ b/drivers/gpio/gpio-mockup.c @@ -197,7 +197,7 @@ static ssize_t gpio_mockup_event_write(struct file *file, struct seq_file *sfile; struct gpio_desc *desc; struct gpio_chip *gc; - int status, val; + int val; char buf; sfile = file->private_data; @@ -206,9 +206,8 @@ static ssize_t gpio_mockup_event_write(struct file *file, chip = priv->chip; gc = &chip->gc; - status = copy_from_user(&buf, usr_buf, 1); - if (status) - return status; + if (copy_from_user(&buf, usr_buf, 1)) + return -EFAULT; if (buf == '0') val = 0; |