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[ Upstream commit6ba2fd391a] This commit adds a check on ops pointer to avoid a kernel panic when ops->strict is used. Indeed, on some pinctrl driver (at least for pinctrl-stmfx) the pinmux ops is not implemented. Let's assume than gpio can be used in this case. Fixes:472a61e777("pinctrl/gpio: Take MUX usage into account") Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com> Link: https://lore.kernel.org/r/20191204144106.10876-1-alexandre.torgue@st.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Sasha Levin <sashal@kernel.org>