pinctrl: fix pinmux_check_ops error checking

Do not use get_functions_count before checking.

Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Dong Aisheng <dong.aisheng@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/pinctrl/pinmux.c b/drivers/pinctrl/pinmux.c
index 375b214..8849830 100644 (file)
--- a/drivers/pinctrl/pinmux.c
+++ b/drivers/pinctrl/pinmux.c
@@ -33,11 +33,12 @@
 int pinmux_check_ops(struct pinctrl_dev *pctldev)
 {
        const struct pinmux_ops *ops = pctldev->desc->pmxops;
-       unsigned nfuncs = ops->get_functions_count(pctldev);
+       unsigned nfuncs;
        unsigned selector = 0;
 
        /* Check that we implement required operations */
-       if (!ops->get_functions_count ||
+       if (!ops ||
+           !ops->get_functions_count ||
            !ops->get_function_name ||
            !ops->get_function_groups ||
            !ops->enable ||
@@ -45,11 +46,12 @@ int pinmux_check_ops(struct pinctrl_dev *pctldev)
                return -EINVAL;
 
        /* Check that all functions registered have names */
+       nfuncs = ops->get_functions_count(pctldev);
        while (selector < nfuncs) {
                const char *fname = ops->get_function_name(pctldev,
                                                           selector);
                if (!fname) {
-                       pr_err("pinmux ops has no name for function%u\n",
+                       dev_err(pctldev->dev, "pinmux ops has no name for function%u\n",
                                selector);
                        return -EINVAL;
                }