[PATCH] pinctrl: do not init debugfs entries for unimplemented functionalities

From: Florian Vaussard
Date: Wed Feb 05 2014 - 01:52:23 EST

Commit c420619 "pinctrl: pinconf: remove checks on ops->pin_config_get"
removed the check on (ops != NULL) when performing pinconf_pins_show() or
pinconf_groups_show(). As these entries are always enabled, even if
pinconf is not supported, reading will result in an oops due to NULL

Instead of checking for ops, remove the corresponding debugfs entries if
pinconf and/or pinmux are not implemented.

Tested on OMAP3 (pinctrl-single).

Signed-off-by: Florian Vaussard <florian.vaussard@xxxxxxx>
drivers/pinctrl/core.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
index 5ee61a4..3f64c01 100644
--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -1642,8 +1642,10 @@ static void pinctrl_init_device_debugfs(struct pinctrl_dev *pctldev)
device_root, pctldev, &pinctrl_groups_ops);
debugfs_create_file("gpio-ranges", S_IFREG | S_IRUGO,
device_root, pctldev, &pinctrl_gpioranges_ops);
- pinmux_init_device_debugfs(device_root, pctldev);
- pinconf_init_device_debugfs(device_root, pctldev);
+ if (pctldev->desc->pmxops)
+ pinmux_init_device_debugfs(device_root, pctldev);
+ if (pctldev->desc->confops)
+ pinconf_init_device_debugfs(device_root, pctldev);

static void pinctrl_remove_device_debugfs(struct pinctrl_dev *pctldev)

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