Re: [PATCH 1/2] usb: misc: onboard_usb_hub: Add support for clock input

[Frieder Schrempf <frieder.schrempf@kontron.de>]

Hi Greg, hi Uwe,

thanks for reviewing!

On 23.11.23 18:36, Uwe Kleine-König wrote:
> Hello,
> 
> On Thu, Nov 23, 2023 at 01:55:57PM +0000, Greg Kroah-Hartman wrote:
>> On Thu, Nov 23, 2023 at 02:47:20PM +0100, Frieder Schrempf wrote:
>>> +	err = clk_prepare_enable(hub->clk);
>>> +	if (err) {
>>> +		dev_err(hub->dev, "failed to enable clock: %d\n", err);
>>> +		return err;
> 
> I suggest to use %pe (and ERR_PTR(err)) here.

Ok, I added this in v2. I also added a patch to convert the other error
logs to be consistent within the driver.

> 
>>> +	}
>>
>> But what happens if clk is not set here?
> 
> clk_prepare_enable() just does "return 0" if the clk argument is NULL.

Exactly!

> 
>> And doesn't clk_prepare_enable() print out a message if it fails?
> 
> clk_prepare_enable is silent on errors.

Right!

Thanks
Frieder