linux-kernel - Re: [PATCH] FBTFT: Changed delay function.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Sun, 3 Nov 2019 16:59:03 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Rama Kumar <ramakumar.kanasundara@...il.com>
Cc:     devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        nishadkamdar@...il.com
Subject: Re: [PATCH] FBTFT: Changed delay function.

On Sun, Nov 03, 2019 at 09:40:03AM -0600, Rama Kumar wrote:
> 
> Hi,
> 
> Changed udelay() to usleep_range() based on the document in the path, "Documentation/timers/timers-howto.rst". It was suggested to use usleep_range() function for sleeping duration between 10us - 20 ms. original code used udelay() for sleeping 20 us.
>  
> ---
> drivers/staging/fbtft/fb_agm1264k-fl.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/staging/fbtft/fb_agm1264k-fl.c b/drivers/staging/fbtft/fb_agm1264k-fl.c
> index eeeeec97ad27..471a145e3c00 100644
> --- a/drivers/staging/fbtft/fb_agm1264k-fl.c
> +++ b/drivers/staging/fbtft/fb_agm1264k-fl.c
> @@ -85,7 +85,7 @@ static void reset(struct fbtft_par *par)
>  	dev_dbg(par->info->device, "%s()\n", __func__);
>  
>  	gpiod_set_value(par->gpio.reset, 0);
> -	udelay(20);
> +	usleep_range(20,20);
>  	gpiod_set_value(par->gpio.reset, 1);
>  	mdelay(120);
>  }
> -- 
> Signed-off-by: Rama Kumar <ramakumar.kanasundara@...il.com>

Always run checkptch.pl on patches you send out so you don't get grumpy
maintainers telling you to run checkpatch.pl on your patch :)

thanks,

greg k-h