2014-07-07 20:22:35

by Rickard Strandqvist

Subject: [PATCH v2] video: fbdev: sis: init.c: Cleaning up variable that is never used

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 | 26 ++++++--------------------
1 file changed, 6 insertions(+), 20 deletions(-)

diff --git a/drivers/video/fbdev/sis/init.c b/drivers/video/fbdev/sis/init.c
index bd40f5e..1948b623 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;
@@ -2659,11 +2659,8 @@ 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);
- if(ModeNo > 0x13) {
- infoflag = SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag;
- }
+ } else if (ModeNo > 0x13) {
+ infoflag = SiS_Pr->SiS_RefIndex[RRTI].Ext_InfoFlag;
}

/* Disable DPMS */
@@ -3539,16 +3536,15 @@ 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 +3554,6 @@ 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 +3587,6 @@ 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 +3604,6 @@ 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

2014-07-08 05:59:37

by Dan Carpenter

Subject: Re: [PATCH v2] video: fbdev: sis: init.c: Cleaning up variable that is never used

On Mon, Jul 07, 2014 at 10:23:47PM +0200, Rickard Strandqvist wrote:
> 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]>

Thanks.

Reviewed-by: Dan Carpenter <[email protected]>

regards,
dan carpenter