linux-kernel - Re: [PATCH v2 4/7] usb: dwc3: Program GFLADJ

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Date:   Tue, 25 Jan 2022 08:17:37 +0200
From:   Felipe Balbi <balbi@...nel.org>
To:     Thinh Nguyen <Thinh.Nguyen@...opsys.com>
Cc:     Sean Anderson <sean.anderson@...o.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        Balaji Prakash J <bjagadee@...eaurora.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Robert Hancock <robert.hancock@...ian.com>,
        Baruch Siach <baruch@...s.co.il>
Subject: Re: [PATCH v2 4/7] usb: dwc3: Program GFLADJ


Hi,

Thinh Nguyen <Thinh.Nguyen@...opsys.com> writes:
>> On 1/24/22 5:46 PM, Thinh Nguyen wrote:
>>> Sean Anderson wrote:
>>>> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
>>>> index 5214daceda86..883e119377f0 100644
>>>> --- a/drivers/usb/dwc3/core.c
>>>> +++ b/drivers/usb/dwc3/core.c
>>>> @@ -348,7 +348,7 @@ static void dwc3_frame_length_adjustment(struct dwc3 *dwc)
>>>>  static void dwc3_ref_clk_period(struct dwc3 *dwc)
>>>>  {
>>>>  	u32 reg;
>>>> -	unsigned long rate, period;
>>>> +	unsigned long decr, fladj, rate, period;
>>>
>>> Minor style nit: Felipe prefers to keep the declaration on separate
>>> lines, let's keep it consistent with the rest in this driver.
>> 
>> So 
>> 
>> unsigned int decr;
>> unsigned int fladj;
>> unsigned int rate;
>> unsigned int period;
>> 
>> ?
>> 
>> Frankly that seems rather verbose.
>
> A couple of the benefits of having it like this is to help with viewing
> git-blame if we introduce new variables and help with backporting fix

it also prevents single lines from being constantly modified just
because we're adding a new variable. In the diff, adding a new variable
should look like a new line being added, rather than modified.

> patch a bit simpler. Mainly I'm just following Felipe's style and keep

it's part of the kernel coding style, actually :-)

-- 
balbi