Simplify driver error paths by adding devm_typec_mux_register() which
will unregister the typec mux when the parent device is unbound.
Cc: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: <linux-usb@xxxxxxxxxxxxxxx>
Cc: Pin-yen Lin <treapking@xxxxxxxxxxxx>
Signed-off-by: Stephen Boyd <swboyd@xxxxxxxxxxxx>
---
drivers/usb/typec/mux.c | 35 +++++++++++++++++++++++++++++++++++
include/linux/usb/typec_mux.h | 7 +++++++
2 files changed, 42 insertions(+)
diff --git a/drivers/usb/typec/mux.c b/drivers/usb/typec/mux.c
index 49926d6e72c7..db644bec862c 100644
--- a/drivers/usb/typec/mux.c
+++ b/drivers/usb/typec/mux.c
@@ -457,6 +457,41 @@ void typec_mux_unregister(struct typec_mux_dev *mux_dev)
}
EXPORT_SYMBOL_GPL(typec_mux_unregister);
+static void devm_typec_mux_unregister(void *mux_dev)
+{
+ typec_mux_unregister(mux_dev);
+}
+
+/**
+ * devm_typec_mux_register - resource managed typec_mux_register()
+ * @parent: Parent device
+ * @desc: Multiplexer description
+ *
+ * Register a typec mux and automatically unregister the typec mux
+ * when @parent is unbound from its driver.
+ *
+ * The arguments to this function are identical to typec_mux_register().
+ *
+ * Return: the typec_mux_dev structure on success or error pointer on error.
+ */
+struct typec_mux_dev *
+devm_typec_mux_register(struct device *parent, const struct typec_mux_desc *desc)
+{
+ int ret;
+ struct typec_mux_dev *mux_dev;
+
+ mux_dev = typec_mux_register(parent, desc);
+ if (IS_ERR(mux_dev))
+ return mux_dev;
+
+ ret = devm_add_action_or_reset(parent, devm_typec_mux_unregister, mux_dev);
+ if (ret)
+ return ERR_PTR(ret);
+
+ return mux_dev;
+}
+EXPORT_SYMBOL_GPL(devm_typec_mux_register);
+
void typec_mux_set_drvdata(struct typec_mux_dev *mux_dev, void *data)
{
dev_set_drvdata(&mux_dev->dev, data);
diff --git a/include/linux/usb/typec_mux.h b/include/linux/usb/typec_mux.h
index efb5ed32b813..08431f0896d5 100644
--- a/include/linux/usb/typec_mux.h
+++ b/include/linux/usb/typec_mux.h
@@ -99,6 +99,8 @@ int typec_mux_set(struct typec_mux *mux, struct typec_mux_state *state);
struct typec_mux_dev *
typec_mux_register(struct device *parent, const struct typec_mux_desc *desc);
+struct typec_mux_dev *
+devm_typec_mux_register(struct device *parent, const struct typec_mux_desc *desc);
void typec_mux_unregister(struct typec_mux_dev *mux);
void typec_mux_set_drvdata(struct typec_mux_dev *mux, void *data);
@@ -123,6 +125,11 @@ typec_mux_register(struct device *parent, const struct typec_mux_desc *desc)
{
return ERR_PTR(-EOPNOTSUPP);
}
+static inline struct typec_mux_dev *
+devm_typec_mux_register(struct device *parent, const struct typec_mux_desc *desc)
+{
+ return typec_mux_register(parent, desc);
+}
static inline void typec_mux_unregister(struct typec_mux_dev *mux) {}
static inline void typec_mux_set_drvdata(struct typec_mux_dev *mux, void *data) {}
--
https://chromeos.dev
