[PATCH] staging: xgifb: vb_init: Removed variables that is never used

[PATCH] staging: xgifb: vb_init: Removed variables that is never used

[Rickard Strandqvist]

Variable was assigned a value that was 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 <rickard_strandqvist@spectrumdigital.se>
---
 drivers/staging/xgifb/vb_init.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/staging/xgifb/vb_init.c b/drivers/staging/xgifb/vb_init.c
index 2b233af..6384077 100644
--- a/drivers/staging/xgifb/vb_init.c
+++ b/drivers/staging/xgifb/vb_init.c
@@ -1187,7 +1187,7 @@ unsigned char XGIInitNew(struct pci_dev *pdev)
 	struct xgi_hw_device_info *HwDeviceExtension = &xgifb_info->hw_info;
 	struct vb_device_info VBINF;
 	struct vb_device_info *pVBInfo = &VBINF;
-	unsigned char i, temp = 0, temp1;
+	unsigned char i, temp = 0;
 
 	pVBInfo->FBAddr = HwDeviceExtension->pjVideoMemoryAddress;
 
@@ -1286,8 +1286,6 @@ unsigned char XGIInitNew(struct pci_dev *pdev)
 		/* disable VideoCapture */
 		xgifb_reg_and_or(pVBInfo->Part0Port, 0x3F, 0xEF, 0x00);
 		xgifb_reg_set(pVBInfo->Part1Port, 0x00, 0x00);
-		/* chk if BCLK>=100MHz */
-		temp1 = xgifb_reg_get(pVBInfo->P3d4, 0x7B);
 
 		xgifb_reg_set(pVBInfo->Part1Port,
 			      0x02, XGI330_CRT2Data_1_2);
-- 
1.7.10.4

Re: [PATCH] staging: xgifb: vb_init: Removed variables that is never used

[Greg Kroah-Hartman]

On Sat, Jan 31, 2015 at 04:20:48PM +0100, Rickard Strandqvist wrote:
> Variable was assigned a value that was 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 <rickard_strandqvist@spectrumdigital.se>
> ---
>  drivers/staging/xgifb/vb_init.c |    4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/staging/xgifb/vb_init.c b/drivers/staging/xgifb/vb_init.c
> index 2b233af..6384077 100644
> --- a/drivers/staging/xgifb/vb_init.c
> +++ b/drivers/staging/xgifb/vb_init.c
> @@ -1187,7 +1187,7 @@ unsigned char XGIInitNew(struct pci_dev *pdev)
>  	struct xgi_hw_device_info *HwDeviceExtension = &xgifb_info->hw_info;
>  	struct vb_device_info VBINF;
>  	struct vb_device_info *pVBInfo = &VBINF;
> -	unsigned char i, temp = 0, temp1;
> +	unsigned char i, temp = 0;
>  
>  	pVBInfo->FBAddr = HwDeviceExtension->pjVideoMemoryAddress;
>  
> @@ -1286,8 +1286,6 @@ unsigned char XGIInitNew(struct pci_dev *pdev)
>  		/* disable VideoCapture */
>  		xgifb_reg_and_or(pVBInfo->Part0Port, 0x3F, 0xEF, 0x00);
>  		xgifb_reg_set(pVBInfo->Part1Port, 0x00, 0x00);
> -		/* chk if BCLK>=100MHz */
> -		temp1 = xgifb_reg_get(pVBInfo->P3d4, 0x7B);

With hardware, you can't just remove all 'read' calls and expect things
to work because a static code checker things something is not right.

I'm going to drop _all_ of the patches you sent me in the past few days
as I really think they all are wrong.  Please be more careful and work
on fixing real problems, not just ones that random tools think might be
wrong.  Weeding out false-positives should not be my job, that's not
scalable at all.

sorry,

greg k-h