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* [PATCH] video: fbdev: imxfb: Fix an error message
@ 2021-05-06 18:57 Christophe JAILLET
  2021-05-07  5:05 ` Uwe Kleine-König
  0 siblings, 1 reply; 5+ messages in thread
From: Christophe JAILLET @ 2021-05-06 18:57 UTC (permalink / raw)
  To: s.hauer, kernel, shawnguo, festevam, linux-imx, j.beisert, krzysztof.h1
  Cc: linux-fbdev, linux-arm-kernel, dri-devel, linux-kernel,
	kernel-janitors, Christophe JAILLET

'ret' is known to be 0 here.
No error code is available, so just remove it from the error message.

Fixes: 72330b0eeefc ("i.MX Framebuffer: Use readl/writel instead of direct pointer deref")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
 drivers/video/fbdev/imxfb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/video/fbdev/imxfb.c b/drivers/video/fbdev/imxfb.c
index 7f8debd2da06..ad598257ab38 100644
--- a/drivers/video/fbdev/imxfb.c
+++ b/drivers/video/fbdev/imxfb.c
@@ -992,7 +992,7 @@ static int imxfb_probe(struct platform_device *pdev)
 	info->screen_buffer = dma_alloc_wc(&pdev->dev, fbi->map_size,
 					   &fbi->map_dma, GFP_KERNEL);
 	if (!info->screen_buffer) {
-		dev_err(&pdev->dev, "Failed to allocate video RAM: %d\n", ret);
+		dev_err(&pdev->dev, "Failed to allocate video RAM\n");
 		ret = -ENOMEM;
 		goto failed_map;
 	}
-- 
2.30.2


^ permalink raw reply	[flat|nested] 5+ messages in thread

* Re: [PATCH] video: fbdev: imxfb: Fix an error message
  2021-05-06 18:57 [PATCH] video: fbdev: imxfb: Fix an error message Christophe JAILLET
@ 2021-05-07  5:05 ` Uwe Kleine-König
  2021-05-07  7:11   ` Christophe JAILLET
  2021-05-07 16:34   ` Daniel Vetter
  0 siblings, 2 replies; 5+ messages in thread
From: Uwe Kleine-König @ 2021-05-07  5:05 UTC (permalink / raw)
  To: Christophe JAILLET
  Cc: s.hauer, kernel, shawnguo, festevam, linux-imx, j.beisert,
	krzysztof.h1, linux-fbdev, kernel-janitors, linux-kernel,
	dri-devel, linux-arm-kernel

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Hello Christophe,

On Thu, May 06, 2021 at 08:57:05PM +0200, Christophe JAILLET wrote:
> 'ret' is known to be 0 here.
> No error code is available, so just remove it from the error message.
> 
> Fixes: 72330b0eeefc ("i.MX Framebuffer: Use readl/writel instead of direct pointer deref")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> ---
>  drivers/video/fbdev/imxfb.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/video/fbdev/imxfb.c b/drivers/video/fbdev/imxfb.c
> index 7f8debd2da06..ad598257ab38 100644
> --- a/drivers/video/fbdev/imxfb.c
> +++ b/drivers/video/fbdev/imxfb.c
> @@ -992,7 +992,7 @@ static int imxfb_probe(struct platform_device *pdev)
>  	info->screen_buffer = dma_alloc_wc(&pdev->dev, fbi->map_size,
>  					   &fbi->map_dma, GFP_KERNEL);
>  	if (!info->screen_buffer) {
> -		dev_err(&pdev->dev, "Failed to allocate video RAM: %d\n", ret);
> +		dev_err(&pdev->dev, "Failed to allocate video RAM\n");
>  		ret = -ENOMEM;
>  		goto failed_map;
>  	}

Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

Are you using this driver, or did you find that problem using some
static checker?

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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^ permalink raw reply	[flat|nested] 5+ messages in thread

* Re: [PATCH] video: fbdev: imxfb: Fix an error message
  2021-05-07  5:05 ` Uwe Kleine-König
@ 2021-05-07  7:11   ` Christophe JAILLET
  2021-05-07  8:20     ` Uwe Kleine-König
  2021-05-07 16:34   ` Daniel Vetter
  1 sibling, 1 reply; 5+ messages in thread
From: Christophe JAILLET @ 2021-05-07  7:11 UTC (permalink / raw)
  To: Uwe Kleine-König
  Cc: s.hauer, kernel, shawnguo, festevam, linux-imx, j.beisert,
	krzysztof.h1, linux-fbdev, kernel-janitors, linux-kernel,
	dri-devel, linux-arm-kernel

Le 07/05/2021 à 07:05, Uwe Kleine-König a écrit :
> Hello Christophe,
> 
> On Thu, May 06, 2021 at 08:57:05PM +0200, Christophe JAILLET wrote:
>> 'ret' is known to be 0 here.
>> No error code is available, so just remove it from the error message.
>>
>> Fixes: 72330b0eeefc ("i.MX Framebuffer: Use readl/writel instead of direct pointer deref")
>> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
>> ---
>>   drivers/video/fbdev/imxfb.c | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/video/fbdev/imxfb.c b/drivers/video/fbdev/imxfb.c
>> index 7f8debd2da06..ad598257ab38 100644
>> --- a/drivers/video/fbdev/imxfb.c
>> +++ b/drivers/video/fbdev/imxfb.c
>> @@ -992,7 +992,7 @@ static int imxfb_probe(struct platform_device *pdev)
>>   	info->screen_buffer = dma_alloc_wc(&pdev->dev, fbi->map_size,
>>   					   &fbi->map_dma, GFP_KERNEL);
>>   	if (!info->screen_buffer) {
>> -		dev_err(&pdev->dev, "Failed to allocate video RAM: %d\n", ret);
>> +		dev_err(&pdev->dev, "Failed to allocate video RAM\n");
>>   		ret = -ENOMEM;
>>   		goto failed_map;
>>   	}
> 
> Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
> 
> Are you using this driver, or did you find that problem using some
> static checker?
> 

No, I'm not using this driver AFAIK.

It has been spotted by coccinelle with a hand-made script which tries to 
find places where error code is used before being initialized.

The script in it-self is not really interesting. It is easy to write and 
my own version trigger way to much false positives.

CJ

> Best regards
> Uwe
> 


^ permalink raw reply	[flat|nested] 5+ messages in thread

* Re: [PATCH] video: fbdev: imxfb: Fix an error message
  2021-05-07  7:11   ` Christophe JAILLET
@ 2021-05-07  8:20     ` Uwe Kleine-König
  0 siblings, 0 replies; 5+ messages in thread
From: Uwe Kleine-König @ 2021-05-07  8:20 UTC (permalink / raw)
  To: Christophe JAILLET
  Cc: linux-fbdev, shawnguo, s.hauer, kernel-janitors, dri-devel,
	linux-kernel, j.beisert, linux-imx, kernel, festevam,
	linux-arm-kernel

[-- Attachment #1: Type: text/plain, Size: 1870 bytes --]

Hello Christophe,

[dropping krzysztof.h1@poczta.fm from recipents, the address doesn't
seem to exist]

On Fri, May 07, 2021 at 09:11:19AM +0200, Christophe JAILLET wrote:
> Le 07/05/2021 à 07:05, Uwe Kleine-König a écrit :
> > On Thu, May 06, 2021 at 08:57:05PM +0200, Christophe JAILLET wrote:
> > > 'ret' is known to be 0 here.
> > > No error code is available, so just remove it from the error message.
> > > 
> > > Fixes: 72330b0eeefc ("i.MX Framebuffer: Use readl/writel instead of direct pointer deref")
> > > Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> > > ---
> > >   drivers/video/fbdev/imxfb.c | 2 +-
> > >   1 file changed, 1 insertion(+), 1 deletion(-)
> > > 
> > > diff --git a/drivers/video/fbdev/imxfb.c b/drivers/video/fbdev/imxfb.c
> > > index 7f8debd2da06..ad598257ab38 100644
> > > --- a/drivers/video/fbdev/imxfb.c
> > > +++ b/drivers/video/fbdev/imxfb.c
> > > @@ -992,7 +992,7 @@ static int imxfb_probe(struct platform_device *pdev)
> > >   	info->screen_buffer = dma_alloc_wc(&pdev->dev, fbi->map_size,
> > >   					   &fbi->map_dma, GFP_KERNEL);
> > >   	if (!info->screen_buffer) {
> > > -		dev_err(&pdev->dev, "Failed to allocate video RAM: %d\n", ret);
> > > +		dev_err(&pdev->dev, "Failed to allocate video RAM\n");
> > >   		ret = -ENOMEM;
> > >   		goto failed_map;
> > >   	}
> > 
> > Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
> > 
> > Are you using this driver, or did you find that problem using some
> > static checker?
> 
> No, I'm not using this driver AFAIK.

OK, thanks. (We're working on a DRM driver for this hardware. So you
could have been an interested tester.)

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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^ permalink raw reply	[flat|nested] 5+ messages in thread

* Re: [PATCH] video: fbdev: imxfb: Fix an error message
  2021-05-07  5:05 ` Uwe Kleine-König
  2021-05-07  7:11   ` Christophe JAILLET
@ 2021-05-07 16:34   ` Daniel Vetter
  1 sibling, 0 replies; 5+ messages in thread
From: Daniel Vetter @ 2021-05-07 16:34 UTC (permalink / raw)
  To: Uwe Kleine-König
  Cc: Christophe JAILLET, linux-fbdev, shawnguo, s.hauer,
	kernel-janitors, krzysztof.h1, dri-devel, linux-kernel,
	j.beisert, linux-imx, kernel, linux-arm-kernel

On Fri, May 07, 2021 at 07:05:03AM +0200, Uwe Kleine-König wrote:
> Hello Christophe,
> 
> On Thu, May 06, 2021 at 08:57:05PM +0200, Christophe JAILLET wrote:
> > 'ret' is known to be 0 here.
> > No error code is available, so just remove it from the error message.
> > 
> > Fixes: 72330b0eeefc ("i.MX Framebuffer: Use readl/writel instead of direct pointer deref")
> > Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> > ---
> >  drivers/video/fbdev/imxfb.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/video/fbdev/imxfb.c b/drivers/video/fbdev/imxfb.c
> > index 7f8debd2da06..ad598257ab38 100644
> > --- a/drivers/video/fbdev/imxfb.c
> > +++ b/drivers/video/fbdev/imxfb.c
> > @@ -992,7 +992,7 @@ static int imxfb_probe(struct platform_device *pdev)
> >  	info->screen_buffer = dma_alloc_wc(&pdev->dev, fbi->map_size,
> >  					   &fbi->map_dma, GFP_KERNEL);
> >  	if (!info->screen_buffer) {
> > -		dev_err(&pdev->dev, "Failed to allocate video RAM: %d\n", ret);
> > +		dev_err(&pdev->dev, "Failed to allocate video RAM\n");
> >  		ret = -ENOMEM;
> >  		goto failed_map;
> >  	}
> 
> Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

Thanks for patch& review, queued for 5.14 in drm-misc-next.
-Daniel

> 
> Are you using this driver, or did you find that problem using some
> static checker?
> 
> Best regards
> Uwe
> 
> -- 
> Pengutronix e.K.                           | Uwe Kleine-König            |
> Industrial Linux Solutions                 | https://www.pengutronix.de/ |



-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

^ permalink raw reply	[flat|nested] 5+ messages in thread

end of thread, other threads:[~2021-05-07 16:34 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-05-06 18:57 [PATCH] video: fbdev: imxfb: Fix an error message Christophe JAILLET
2021-05-07  5:05 ` Uwe Kleine-König
2021-05-07  7:11   ` Christophe JAILLET
2021-05-07  8:20     ` Uwe Kleine-König
2021-05-07 16:34   ` Daniel Vetter

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