[RFC v2 01/13] usb: misc: usb3503: Clean up on driver unbind

Javier Martinez Canillas
2016-05-05T18:32:16Z

Hello Krzysztof

Patch looks good to me, I just have a trivial comment below.

On 05/05/2016 08:34 AM, Krzysztof Kozlowski wrote:
> The driver should clean up after itself by unpreparing the clock when it
> is unbound.
>
> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
> ---
> drivers/usb/misc/usb3503.c | 28 ++++++++++++++++++++++++++++
> 1 file changed, 28 insertions(+)
>
> diff --git a/drivers/usb/misc/usb3503.c b/drivers/usb/misc/usb3503.c
> index b45cb77c0744..a464636675a6 100644
> --- a/drivers/usb/misc/usb3503.c
> +++ b/drivers/usb/misc/usb3503.c
> @@ -330,6 +330,19 @@ static int usb3503_i2c_probe(struct i2c_client *i2c,
> return usb3503_probe(hub);
> }
>
> +static int usb3503_i2c_remove(struct i2c_client *i2c)
> +{
> + struct usb3503 *hub;
> +
> + hub = i2c_get_clientdata(i2c);
> + if (hub) {
> + if (hub->clk)
> + clk_disable_unprepare(hub->clk);
> + }

I think the following is simpler and easier to read:

if (hub && hub->clk)
clk_disable_unprepare(hub->clk);

> +
> + return 0;
> +}
> +
> static int usb3503_platform_probe(struct platform_device *pdev)
> {
> struct usb3503 *hub;
> @@ -342,6 +355,19 @@ static int usb3503_platform_probe(struct platform_device *pdev)
> return usb3503_probe(hub);
> }
>
> +static int usb3503_platform_remove(struct platform_device *pdev)
> +{
> + struct usb3503 *hub;
> +
> + hub = platform_get_drvdata(pdev);
> + if (hub) {
> + if (hub->clk)
> + clk_disable_unprepare(hub->clk);
> + }
> +

Ditto.

> + return 0;
> +}
> +
> #ifdef CONFIG_PM_SLEEP
> static int usb3503_i2c_suspend(struct device *dev)
> {
> @@ -395,6 +421,7 @@ static struct i2c_driver usb3503_i2c_driver = {
> .of_match_table = of_match_ptr(usb3503_of_match),
> },
> .probe = usb3503_i2c_probe,
> + .remove = usb3503_i2c_remove,
> .id_table = usb3503_id,
> };
>
> @@ -404,6 +431,7 @@ static struct platform_driver usb3503_platform_driver = {
> .of_match_table = of_match_ptr(usb3503_of_match),
> },
> .probe = usb3503_platform_probe,
> + .remove = usb3503_platform_remove,
> };
>
> static int __init usb3503_init(void)
>

Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>

Best regards,
--
Javier Martinez Canillas
Open Source Group
Samsung Research America