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Linus Walleij authored
The bgpio_get_set() call should return a value clamped to [0,1], the current code will return a negative value if reading bit 31, which turns the value negative as this is a signed value and thus gets interpreted as an error by the gpiolib core. Found on the gpio-mxc but applies to any MMIO driver. Cc: stable@vger.kernel.org # 4.3+ Cc: kernel@pengutronix.de Cc: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> Fixes: e20538b8 ("gpio: Propagate errors from chip->get()") Reported-by:
Clemens Gruber <clemens.gruber@pqgruber.com> Signed-off-by:
Linus Walleij <linus.walleij@linaro.org>
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