4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ricardo Ribalda Delgado <ricardo.riba...@gmail.com>
commit 19a4fbffc94e41abaa2a623a25ce2641d69eccf0 upstream.
The current code only frees N-1 gpios if an error occurs during
gpiod_set_transitory, gpiod_direction_output or gpiod_direction_input.
Leading to gpios that cannot be used by userspace nor other drivers.
Cc: Timur Tabi <ti...@codeaurora.org>
Cc: sta...@vger.kernel.org
Fixes: ab3dbcf78f60f46d ("gpioib: do not free unrequested descriptors)
Reported-by: Jan Lorenzen <j...@newtec.dk>
Reported-by: Jim Paris <j...@jtan.com>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.riba...@gmail.com>
Signed-off-by: Linus Walleij <linus.wall...@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/gpio/gpiolib.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -471,7 +471,7 @@ static int linehandle_create(struct gpio
if (ret)
goto out_free_descs;
lh->descs[i] = desc;
- count = i;
+ count = i + 1;
if (lflags & GPIOHANDLE_REQUEST_ACTIVE_LOW)
set_bit(FLAG_ACTIVE_LOW, &desc->flags);
