linux-kernel - Re: [PATCH] video: fbdev: sis: init.c: Cleaning up redundant condition is always true

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Date:	Mon, 7 Jul 2014 22:36:38 +0200
From:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
To:	Noralf Tronnes <notro@...nnes.org>
Cc:	Dan Carpenter <dan.carpenter@...cle.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	Jingoo Han <jg1.han@...sung.com>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	Mauro Carvalho Chehab <m.chehab@...sung.com>,
	"Chen, Gong" <gong.chen@...ux.intel.com>,
	Linux Fbdev development list <linux-fbdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] video: fbdev: sis: init.c: Cleaning up redundant
 condition is always true

2014-07-07 11:23 GMT+02:00 Noralf Tronnes <notro@...nnes.org>:
> Den 07.07.2014 09:57, skrev Dan Carpenter:
>
>> On Thu, Jul 03, 2014 at 11:15:21PM +0200, Rickard Strandqvist wrote:
>>>
>>> diff --git a/drivers/video/fbdev/sis/init.c
>>> b/drivers/video/fbdev/sis/init.c
>>> index bd40f5e..9e2dd96 100644
>>> --- a/drivers/video/fbdev/sis/init.c
>>> +++ b/drivers/video/fbdev/sis/init.c
>>> @@ -355,12 +355,12 @@ SiS_GetModeID(int VGAEngine, unsigned int VBFlags,
>>> int HDisplay, int VDisplay,
>>>                 }
>>>                 break;
>>>         case 400:
>>> -               if((!(VBFlags & CRT1_LCDA)) || ((LCDwidth >= 800) &&
>>> (LCDwidth >= 600))) {
>>> +               if ((!(VBFlags & CRT1_LCDA)) || (LCDwidth >= 600)) {
>>
>>
>> It might be that this was supposed to be:
>>
>>                 if((!(VBFlags & CRT1_LCDA)) || ((LCDwidth <= 800) &&
>> (LCDwidth >= 600))) {
>>
>> But why would people write a range from high to low?  That's crazy
>> people who write backwards code...
>
> The numbers 800x600 (1024x768) indicate that LCDheight is meant to be used:
>                  if((!(VBFlags & CRT1_LCDA)) || ((LCDwidth >= 800) &&
> (LCDheight >= 600))) {
>
> regards,
> Noralf Tronnes

Hi

Nice, this is what is the point of fix this type of minor errors.
Sometimes you can find something more serious :)

New patch on the way!

Kind regards
Rickard Strandqvist
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