Re: [PATCH v2 01/11] driver: platform: add and use helper for safer setting of driver_override

On Wed, Feb 23, 2022 at 08:13:00PM +0100, Krzysztof Kozlowski wrote:

Several core drivers and buses expect that driver_override is a dynamically allocated memory thus later they can kfree() it. ...

• • set_driver_override() - Helper to set or clear driver override.

Doesn't match actual function name.

• • @dev: Device to change
• • @override: Address of string to change (e.g. &device->driver_override);

• •        The contents will be freed and hold newly allocated override.
    

• • @s: NULL terminated string, new driver name to force a match, pass empty

• • string to clear it
    

• • Helper to setr or clear driver override in a device, intended for the cases
• • when the driver_override field is allocated by driver/bus code.

s/setr/set/

• • Returns: 0 on success or a negative error code on failure.
• */

+int driver_set_override(struct device *dev, char **override, const char *s) +{