2014-07-05 12:47:13

by Rickard Strandqvist

[permalink] [raw]
Subject: [PATCH] video: fbdev: sis: init.c: Cleaning up variable that is never used

From: Rickard Strandqvist <[email protected]>

Variable ar assigned a value that is never used.
I have also removed all the code that thereby serves no purpose.

This was found using a static code analysis program called cppcheck

Signed-off-by: Rickard Strandqvist <[email protected]>
---
drivers/video/fbdev/sis/init.c | 21 +++++----------------
1 file changed, 5 insertions(+), 16 deletions(-)

diff --git a/drivers/video/fbdev/sis/init.c b/drivers/video/fbdev/sis/init.c
index bd40f5e..3ba446c 100644
--- a/drivers/video/fbdev/sis/init.c
+++ b/drivers/video/fbdev/sis/init.c
@@ -2649,7 +2649,7 @@ static void
SiS_SetCRT1ModeRegs(struct SiS_Private *SiS_Pr, unsigned short ModeNo,
unsigned short ModeIdIndex, unsigned short RRTI)
{
- unsigned short data, infoflag = 0, modeflag, resindex;
+ unsigned short data, infoflag = 0, modeflag;
#ifdef CONFIG_FB_SIS_315
unsigned char *ROMAddr = SiS_Pr->VirtualRomBase;
unsigned short data2, data3;
@@ -2660,7 +2660,7 @@ SiS_SetCRT1ModeRegs(struct SiS_Private *SiS_Pr, unsigned short ModeNo,
if(SiS_Pr->UseCustomMode) {
infoflag = SiS_Pr->CInfoFlag;
} else {
- resindex = SiS_GetResInfo(SiS_Pr, ModeNo, ModeIdIndex);
+ SiS_GetResInfo(SiS_Pr, ModeNo, ModeIdIndex);
if(ModeNo > 0x13) {
infoflag = SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag;
}
@@ -3539,16 +3539,15 @@ SiS_Generic_ConvertCRData(struct SiS_Private *SiS_Pr, unsigned char *crdata,
struct fb_var_screeninfo *var, bool writeres
)
{
- unsigned short HRE, HBE, HRS, HBS, HDE, HT;
- unsigned short VRE, VBE, VRS, VBS, VDE, VT;
+ unsigned short HRE, HBE, HRS, HDE, HT;
+ unsigned short VRE, VBE, VRS, VDE, VT;
unsigned char sr_data, cr_data, cr_data2;
- int A, B, C, D, E, F, temp;
+ int B, C, D, E, F, temp;

sr_data = crdata[14];

/* Horizontal total */
HT = crdata[0] | ((unsigned short)(sr_data & 0x03) << 8);
- A = HT + 5;

/* Horizontal display enable end */
HDE = crdata[1] | ((unsigned short)(sr_data & 0x0C) << 6);
@@ -3558,9 +3557,6 @@ SiS_Generic_ConvertCRData(struct SiS_Private *SiS_Pr, unsigned char *crdata,
HRS = crdata[4] | ((unsigned short)(sr_data & 0xC0) << 2);
F = HRS - E - 3;

- /* Horizontal blank start */
- HBS = crdata[2] | ((unsigned short)(sr_data & 0x30) << 4);
-
sr_data = crdata[15];
cr_data = crdata[5];

@@ -3594,7 +3590,6 @@ SiS_Generic_ConvertCRData(struct SiS_Private *SiS_Pr, unsigned char *crdata,
((unsigned short)(cr_data & 0x01) << 8) |
((unsigned short)(cr_data & 0x20) << 4) |
((unsigned short)(sr_data & 0x01) << 10);
- A = VT + 2;

/* Vertical display enable end */
VDE = crdata[10] |
@@ -3612,12 +3607,6 @@ SiS_Generic_ConvertCRData(struct SiS_Private *SiS_Pr, unsigned char *crdata,

cr_data2 = (crdata[16] & 0x01) << 5;

- /* Vertical blank start */
- VBS = crdata[11] |
- ((unsigned short)(cr_data & 0x08) << 5) |
- ((unsigned short)(cr_data2 & 0x20) << 4) |
- ((unsigned short)(sr_data & 0x04) << 8);
-
/* Vertical blank end */
VBE = crdata[12] | ((unsigned short)(sr_data & 0x10) << 4);
temp = VBE - ((E - 1) & 511);
--
1.7.10.4


2014-07-05 19:26:26

by Dan Carpenter

[permalink] [raw]
Subject: Re: [PATCH] video: fbdev: sis: init.c: Cleaning up variable that is never used

On Sat, Jul 05, 2014 at 02:48:27PM +0200, Rickard Strandqvist wrote:
> From: Rickard Strandqvist <[email protected]>

These for lines are for when you are sending on someone else's behalf.

>
> Variable ar assigned a value that is never used.
> I have also removed all the code that thereby serves no purpose.
>
> This was found using a static code analysis program called cppcheck
>
> Signed-off-by: Rickard Strandqvist <[email protected]>
> ---
> drivers/video/fbdev/sis/init.c | 21 +++++----------------
> 1 file changed, 5 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/video/fbdev/sis/init.c b/drivers/video/fbdev/sis/init.c
> index bd40f5e..3ba446c 100644
> --- a/drivers/video/fbdev/sis/init.c
> +++ b/drivers/video/fbdev/sis/init.c
> @@ -2649,7 +2649,7 @@ static void
> SiS_SetCRT1ModeRegs(struct SiS_Private *SiS_Pr, unsigned short ModeNo,
> unsigned short ModeIdIndex, unsigned short RRTI)
> {
> - unsigned short data, infoflag = 0, modeflag, resindex;
> + unsigned short data, infoflag = 0, modeflag;
> #ifdef CONFIG_FB_SIS_315
> unsigned char *ROMAddr = SiS_Pr->VirtualRomBase;
> unsigned short data2, data3;
> @@ -2660,7 +2660,7 @@ SiS_SetCRT1ModeRegs(struct SiS_Private *SiS_Pr, unsigned short ModeNo,
> if(SiS_Pr->UseCustomMode) {
> infoflag = SiS_Pr->CInfoFlag;
> } else {
> - resindex = SiS_GetResInfo(SiS_Pr, ModeNo, ModeIdIndex);
> + SiS_GetResInfo(SiS_Pr, ModeNo, ModeIdIndex);

Remove this whole line.

regards,
dan carpenter

2014-07-05 19:44:59

by Geert Uytterhoeven

[permalink] [raw]
Subject: Re: [PATCH] video: fbdev: sis: init.c: Cleaning up variable that is never used

On Sat, Jul 5, 2014 at 9:23 PM, Dan Carpenter <[email protected]> wrote:
> On Sat, Jul 05, 2014 at 02:48:27PM +0200, Rickard Strandqvist wrote:
>> From: Rickard Strandqvist <[email protected]>
>
> These for lines are for when you are sending on someone else's behalf.

Or for when you are sending the patches from a different email address
than the one that should be recorded in git.

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds

2014-07-05 20:07:44

by Dan Carpenter

[permalink] [raw]
Subject: Re: [PATCH] video: fbdev: sis: init.c: Cleaning up variable that is never used

On Sat, Jul 05, 2014 at 09:44:56PM +0200, Geert Uytterhoeven wrote:
> On Sat, Jul 5, 2014 at 9:23 PM, Dan Carpenter <[email protected]> wrote:
> > On Sat, Jul 05, 2014 at 02:48:27PM +0200, Rickard Strandqvist wrote:
> >> From: Rickard Strandqvist <[email protected]>
> >
> > These for lines are for when you are sending on someone else's behalf.
>
> Or for when you are sending the patches from a different email address
> than the one that should be recorded in git.
>

Yeah. But it's better to fix your email client so we can at least
verify that the signed off matches the author tag.

I know a lot of people have trouble configuring email but in the end
everyone pretty much manages when we ask them to.

regards,
dan carpenter

2014-07-05 20:13:25

by Dan Carpenter

[permalink] [raw]
Subject: Re: [PATCH] video: fbdev: sis: init.c: Cleaning up variable that is never used

Verifying the email address is not 100% fool proof so it's not a massive
deal either way. The only reason I mentioned it here was because this
patch wasn't correct anyway and had to be redone regardless.

regards,
dan carpenter