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gpio: syscon: Fix possible NULL ptr usage

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[ Upstream commit 70728c29465bc4bfa7a8c14304771eab77e923c7 ]

The priv->data->set can be NULL while flags contains GPIO_SYSCON_FEAT_OUT
and chip->set is valid pointer. This happens in case the controller uses
the default GPIO setter. Always use chip->set to access the setter to avoid
possible NULL pointer dereferencing.

Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Marek Vasut 2018-10-04 00:52:52 +02:00 committed by Greg Kroah-Hartman
parent f1dda24ada
commit 4d7ddcdbdf
1 changed files with 1 additions and 1 deletions
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2
drivers/gpio/gpio-syscon.c
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@ -122,7 +122,7 @@ static int syscon_gpio_dir_out(struct gpio_chip *chip, unsigned offset, int val)
BIT(offs % SYSCON_REG_BITS));
}
priv->data->set(chip, offset, val);
chip->set(chip, offset, val);
return 0;
}