4.11-stable review patch. If anyone has any objections, please let me know.
------------------ From: Bartosz Golaszewski <[email protected]> commit ad537b822577fcc143325786cd6ad50d7b9df31c upstream. GPIOEVENT_REQUEST_BOTH_EDGES is not a single flag, but a binary OR of GPIOEVENT_REQUEST_RISING_EDGE and GPIOEVENT_REQUEST_FALLING_EDGE. The expression 'le->eflags & GPIOEVENT_REQUEST_BOTH_EDGES' we'll get evaluated to true even if only one event type was requested. Fix it by checking both RISING & FALLING flags explicitly. Fixes: 61f922db7221 ("gpio: userspace ABI for reading GPIO line events") Signed-off-by: Bartosz Golaszewski <[email protected]> Signed-off-by: Linus Walleij <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/gpio/gpiolib.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -708,7 +708,8 @@ static irqreturn_t lineevent_irq_thread( ge.timestamp = ktime_get_real_ns(); - if (le->eflags & GPIOEVENT_REQUEST_BOTH_EDGES) { + if (le->eflags & GPIOEVENT_REQUEST_RISING_EDGE + && le->eflags & GPIOEVENT_REQUEST_FALLING_EDGE) { int level = gpiod_get_value_cansleep(le->desc); if (level)
