linux-kernel - Re: [PATCH v2] staging: greybus: remove tabs to fix line length and merge lines

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Date:   Sun, 12 Mar 2023 18:01:03 -0700
From:   Ira Weiny <ira.weiny@...el.com>
To:     Khadija Kamran <kamrankhadijadj@...il.com>,
        <outreachy@...ts.linux.dev>
CC:     Vaibhav Hiremath <hvaibhav.linux@...il.com>,
        Johan Hovold <johan@...nel.org>, Alex Elder <elder@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        <greybus-dev@...ts.linaro.org>, <linux-staging@...ts.linux.dev>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] staging: greybus: remove tabs to fix line length and
 merge lines

Khadija Kamran wrote:
> In file drivers/staging/greybus/arche-platform.c,
> - Length of line 181 exceeds 100 columns, fix by removing tabs from the
>   line.
> - If condition and spin_unlock_...() call is split into two lines, join
> them to form a single line.
> 
> Signed-off-by: Khadija Kamran <kamrankhadijadj@...il.com>

Fundamentally the problem with arche_platform_wd_irq() is that the
indentation is too great.

"... if you need more than 3 levels of indentation, you’re screwed anyway,
and should fix your program."

	-- https://www.kernel.org/doc/html/v4.10/process/coding-style.html#indentation

I think a better solution would be to refactor the entire function.  This
would make the logic of the function more clear as well IMHO.

Here is another tip to help:

https://www.kernel.org/doc/html/v4.10/process/coding-style.html#centralized-exiting-of-functions

Do you think you could try that?
Ira

> ---
> Changes in v2:
>  - Change the subject and log message
>  - Merge if condition and spin_unlock...() from two lines to one 
>  drivers/staging/greybus/arche-platform.c | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/staging/greybus/arche-platform.c b/drivers/staging/greybus/arche-platform.c
> index fcbd5f71eff2..00ed5dfd7915 100644
> --- a/drivers/staging/greybus/arche-platform.c
> +++ b/drivers/staging/greybus/arche-platform.c
> @@ -176,12 +176,10 @@ static irqreturn_t arche_platform_wd_irq(int irq, void *devid)
>  				 * Check we are not in middle of irq thread
>  				 * already
>  				 */
> -				if (arche_pdata->wake_detect_state !=
> -						WD_STATE_COLDBOOT_START) {
> +				if (arche_pdata->wake_detect_state != WD_STATE_COLDBOOT_START) {
>  					arche_platform_set_wake_detect_state(arche_pdata,
> -									     WD_STATE_COLDBOOT_TRIG);
> -					spin_unlock_irqrestore(&arche_pdata->wake_lock,
> -							       flags);
> +						WD_STATE_COLDBOOT_TRIG);
> +					spin_unlock_irqrestore(&arche_pdata->wake_lock, flags);
>  					return IRQ_WAKE_THREAD;
>  				}
>  			}
> -- 
> 2.34.1
> 
>