Hi Guenter, On Wed, 14 Jan 2015 08:24:43 -0800, Guenter Roeck wrote: > On Wed, Jan 14, 2015 at 04:15:25PM +0100, Jean Delvare wrote: > > I did that. On my system the i2c-i801 driver instantiates an > > i2c-mux-gpio device. Unloading the i2c-i801 driver removes that device > > and it works fine. Note however that I am not able to unload module > > i2c-i801 immediately, I have to unload module i2c-mux-gpio first, as > > the latter holds a reference to the former. This is because > > i2c-mux-gpio calls i2c_get_adapter() on the parent I2C bus segment at > > probing time. > > > > I see that i2c-mux-pinctrl does the same, but i2c-mux-pca954x and > > i2c-mux-pca9541 do not. This might be an issue. I doubt this is related > > to your problem though, as these are module references and not device > > references. > > Should we add get/put functions to those drivers ? I'm not sure. If you unload a driver which instantiated a pca9540-like device, without unloading i2c-mux-pca954x first, does something bad happen? -- Jean Delvare SUSE L3 Support -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
