pinctrl: handle zero found dt pinconfig properties better

This adds a shortcut when no valid pinconf properties are found
in the parsed dt node, to set the values immediately and return.

Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/pinctrl/pinconf-generic.c b/drivers/pinctrl/pinconf-generic.c
index dcf03714de90..ea9da1752252 100644
--- a/drivers/pinctrl/pinconf-generic.c
+++ b/drivers/pinctrl/pinconf-generic.c
@@ -208,6 +208,13 @@ int pinconf_generic_parse_dt_config(struct device_node *np,
                 ncfg++;
         }
 
+        /* no configs found at all */
+        if (ncfg == 0) {
+                *configs = NULL;
+                *nconfigs = 0;
+                return 0;
+        }
+
         /*
          * Now limit the number of configs to the real number of
          * found properties.