Commit 6ebe0373 authored by Axel Lin's avatar Axel Lin Committed by Greg Kroah-Hartman

gpio: adnp: Fix testing wrong value in adnp_gpio_direction_input

commit c5bc6e52 upstream.

Current code test wrong value so it does not verify if the written
data is correctly read back. Fix it.
Also make it return -EPERM if read value does not match written bit,
just like it done for adnp_gpio_direction_output().

Fixes: 5e969a40 ("gpio: Add Avionic Design N-bit GPIO expander support")
Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarAxel Lin <axel.lin@ingics.com>
Reviewed-by: default avatarThierry Reding <thierry.reding@gmail.com>
Signed-off-by: default avatarBartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b26f7e86
......@@ -132,8 +132,10 @@ static int adnp_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
if (err < 0)
goto out;
if (err & BIT(pos))
err = -EACCES;
if (value & BIT(pos)) {
err = -EPERM;
goto out;
}
err = 0;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment