From 8c9312a925ad859daefd0f443ef3b6dc7157d881 Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Wed, 6 Nov 2019 22:21:01 +0100 Subject: i2c: add helper to check if a client has a driver attached As a preparation for an API conversion, factor out something frequently used in the media subsystem. As an improvement, it bails out on both, NULL and ERRPTR to handle the old and new API. Signed-off-by: Wolfram Sang Signed-off-by: Wolfram Sang --- include/linux/i2c.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux/i2c.h') diff --git a/include/linux/i2c.h b/include/linux/i2c.h index 91954324f985..582ef05ec07e 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -851,6 +851,11 @@ extern void i2c_del_driver(struct i2c_driver *driver); #define i2c_add_driver(driver) \ i2c_register_driver(THIS_MODULE, driver) +static inline bool i2c_client_has_driver(struct i2c_client *client) +{ + return !IS_ERR_OR_NULL(client) && client->dev.driver; +} + /* call the i2c_client->command() of all attached clients with * the given arguments */ extern void i2c_clients_command(struct i2c_adapter *adap, -- cgit v1.2.3-58-ga151