linux-kernel - Re: [PATCH] staging: rts5208: Replace instances of udelay by usleep

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Message-ID: <c3c211c1c99cd19f86fb801576c55b2ae2216c6f.camel@perches.com>
Date:   Wed, 19 Oct 2022 21:40:31 -0700
From:   Joe Perches <joe@...ches.com>
To:     Tanjuate Brunostar <tanjubrunostar0@...il.com>,
        gregkh@...uxfoundation.org, linux-staging@...ts.linux.dev,
        linux-kernel@...r.kernel.org, outreachy@...ts.linux.dev
Subject: Re: [PATCH] staging: rts5208: Replace instances of udelay by
 usleep_range

On Tue, 2022-10-18 at 14:04 +0000, Tanjuate Brunostar wrote:
> Replace the use of udelay by usleep_range as suggested by checkpatch:
> 
> CHECK: usleep_range is preferred over udelay; see Documentation/timers/timers-howto.rst
> +               udelay(30);
[]
> diff --git a/drivers/staging/rts5208/ms.c b/drivers/staging/rts5208/ms.c
[]
> @@ -3235,7 +3235,7 @@ static int ms_write_multiple_pages(struct rtsx_chip *chip, u16 old_blk,
>  			return STATUS_FAIL;
>  		}
>  
> -		udelay(30);
> +		usleep_range(30, 30);

This isn't useful.  Please read the Documentation/timers.