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(parent: 7fda910) | patch
gpio: sysfs: correct error handling on 'value' attribute read.
authorChristophe Leroy <christophe.leroy@c-s.fr>
Mon, 18 Dec 2017 10:08:31 +0000 (11:08 +0100)
committerLinus Walleij <linus.walleij@linaro.org>
Wed, 20 Dec 2017 09:33:21 +0000 (10:33 +0100)
commit9295c01253b4eda5dc0b5a5b2e0fd321fe57010c
tree779f856770f7759d7f15bd29c9717e44208be691tree | snapshot
parent7fda9100bb8258bbdff90f3db5079d28eb9b0013commit | diff
gpio: sysfs: correct error handling on 'value' attribute read.

'value' attribute is supposed to only return 0 or 1 according to
the documentation.
With today's implementation, if gpiod_get_value_cansleep() fails
the printed 'value' is a negative value.

This patch ensures that an error is returned on read instead.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
drivers/gpio/gpiolib-sysfs.c diff | blob | history
John Crispins staging tree