[PATCH 1/4] pinctrl: Free debugfs entries when unloading a pinmux driver

[Tony Lindgren <tony@atomide.com>]

Free debugfs entries when unloading a pinmux driver

Signed-off-by: Tony Lindgren <tony@atomide.com>
---
 drivers/pinctrl/core.c |   14 +++++++++++++-
 drivers/pinctrl/core.h |    3 +++
 2 files changed, 16 insertions(+), 1 deletions(-)

diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
index 569bdb3..d9d35fc 100644
--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -510,10 +510,12 @@ static struct dentry *debugfs_root;
 
 static void pinctrl_init_device_debugfs(struct pinctrl_dev *pctldev)
 {
-	static struct dentry *device_root;
+	struct dentry *device_root;
 
 	device_root = debugfs_create_dir(dev_name(pctldev->dev),
 					 debugfs_root);
+	pctldev->device_root = device_root;
+
 	if (IS_ERR(device_root) || !device_root) {
 		pr_warn("failed to create debugfs directory for %s\n",
 			dev_name(pctldev->dev));
@@ -529,6 +531,11 @@ static void pinctrl_init_device_debugfs(struct pinctrl_dev *pctldev)
 	pinconf_init_device_debugfs(device_root, pctldev);
 }
 
+static void pinctrl_remove_device_debugfs(struct pinctrl_dev *pctldev)
+{
+	debugfs_remove_recursive(pctldev->device_root);
+}
+
 static void pinctrl_init_debugfs(void)
 {
 	debugfs_root = debugfs_create_dir("pinctrl", NULL);
@@ -553,6 +560,10 @@ static void pinctrl_init_debugfs(void)
 {
 }
 
+static void pinctrl_remove_device_debugfs(struct pinctrl_dev *pctldev)
+{
+}
+
 #endif
 
 /**
@@ -641,6 +652,7 @@ void pinctrl_unregister(struct pinctrl_dev *pctldev)
 	if (pctldev == NULL)
 		return;
 
+	pinctrl_remove_device_debugfs(pctldev);
 	pinmux_unhog_maps(pctldev);
 	/* TODO: check that no pinmuxes are still active? */
 	mutex_lock(&pinctrldev_list_mutex);
diff --git a/drivers/pinctrl/core.h b/drivers/pinctrl/core.h
index 177a331..cfa86da 100644
--- a/drivers/pinctrl/core.h
+++ b/drivers/pinctrl/core.h
@@ -41,6 +41,9 @@ struct pinctrl_dev {
 	struct device *dev;
 	struct module *owner;
 	void *driver_data;
+#ifdef CONFIG_DEBUG_FS
+	struct dentry *device_root;
+#endif
 #ifdef CONFIG_PINMUX
 	struct mutex pinmux_hogs_lock;
 	struct list_head pinmux_hogs;