gpiolib: fix filtering out unwanted events

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commit ad537b8225 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: 61f922db72 ("gpio: userspace ABI for reading GPIO line events")
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Bartosz Golaszewski 2017-06-23 13:45:16 +02:00 • committed by Greg Kroah-Hartman

parent cb2c6fdf62

commit 78c4244f8b

1 changed files with 2 additions and 1 deletions

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drivers/gpio/gpiolib.c

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