…
+++ b/drivers/i2c/busses/i2c-rtl9300.c…
@@ -0,0 +1,422 @@
+static int rtl9300_i2c_smbus_xfer(struct i2c_adapter *adap, u16 addr, unsigned short flags,…
+ char read_write, u8 command, int size,
+ union i2c_smbus_data *data)
+{
+ mutex_lock(&i2c->lock);…
+ if (chan->sda_pin != i2c->sda_pin) {
+out_unlock:…
+ mutex_unlock(&i2c->lock);
+
+ return ret;
+}
Under which circumstances would you become interested to apply a statement
like “guard(mutex)(&i2c->lock);”?
https://elixir.bootlin.com/linux/v6.11/source/include/linux/mutex.h#L196