[PATCH 8/10] drivers/video/imxfb.c: add missing clk_put

[PATCH 8/10] drivers/video/imxfb.c: add missing clk_put

[Julia Lawall]

From: Julia Lawall <julia@diku.dk>

Reorder the labels at the end of the function to correspond to the order in
which the resources are allocated.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@r exists@
expression e1,e2;
statement S;
@@

e1 = clk_get@p1(...);
... when != e1 = e2
    when != clk_put(e1)
    when any
if (...) { ... when != clk_put(e1)
               when != if (...) { ... clk_put(e1) ... }
* return@p3 ...;
 } else S
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>

---
 drivers/video/imxfb.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/video/imxfb.c b/drivers/video/imxfb.c
index d2ccfd6..f135dbe 100644
--- a/drivers/video/imxfb.c
+++ b/drivers/video/imxfb.c
@@ -856,10 +856,10 @@ failed_platform_init:
 		dma_free_writecombine(&pdev->dev,fbi->map_size,fbi->map_cpu,
 			fbi->map_dma);
 failed_map:
-	clk_put(fbi->clk);
-failed_getclock:
 	iounmap(fbi->regs);
 failed_ioremap:
+	clk_put(fbi->clk);
+failed_getclock:
 	release_mem_region(res->start, resource_size(res));
 failed_req:
 	kfree(info->pseudo_palette);

[PATCH 10/10] drivers/video/pxa168fb.c: add missing clk_put

[Julia Lawall]

From: Julia Lawall <julia@diku.dk>

Add a label for error-handling code in the case where only clk_get has
succeeded.  Rename the label failed to be consistent with the rest.

A simplified version of the semantic match that finds the missing clk_put
is as follows: (http://coccinelle.lip6.fr/)

// <smpl>
@r exists@
expression e1,e2;
statement S;
@@

e1 = clk_get@p1(...);
... when != e1 = e2
    when != clk_put(e1)
    when any
if (...) { ... when != clk_put(e1)
               when != if (...) { ... clk_put(e1) ... }
* return@p3 ...;
 } else S
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>

---
 drivers/video/pxa168fb.c |   17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/drivers/video/pxa168fb.c b/drivers/video/pxa168fb.c
index 35f61dd..bb95ec5 100644
--- a/drivers/video/pxa168fb.c
+++ b/drivers/video/pxa168fb.c
@@ -623,19 +623,21 @@ static int __devinit pxa168fb_probe(struct platform_device *pdev)
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (res = NULL) {
 		dev_err(&pdev->dev, "no IO memory defined\n");
-		return -ENOENT;
+		ret = -ENOENT;
+		goto failed_put_clk;
 	}
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0) {
 		dev_err(&pdev->dev, "no IRQ defined\n");
-		return -ENOENT;
+		ret = -ENOENT;
+		goto failed_put_clk;
 	}
 
 	info = framebuffer_alloc(sizeof(struct pxa168fb_info), &pdev->dev);
 	if (info = NULL) {
-		clk_put(clk);
-		return -ENOMEM;
+		ret = -ENOMEM;
+		goto failed_put_clk;
 	}
 
 	/* Initialize private data */
@@ -671,7 +673,7 @@ static int __devinit pxa168fb_probe(struct platform_device *pdev)
 	fbi->reg_base = ioremap_nocache(res->start, resource_size(res));
 	if (fbi->reg_base = NULL) {
 		ret = -ENOMEM;
-		goto failed;
+		goto failed_free_info;
 	}
 
 	/*
@@ -683,7 +685,7 @@ static int __devinit pxa168fb_probe(struct platform_device *pdev)
 						&fbi->fb_start_dma, GFP_KERNEL);
 	if (info->screen_base = NULL) {
 		ret = -ENOMEM;
-		goto failed;
+		goto failed_free_info;
 	}
 
 	info->fix.smem_start = (unsigned long)fbi->fb_start_dma;
@@ -772,8 +774,9 @@ failed_free_clk:
 failed_free_fbmem:
 	dma_free_coherent(fbi->dev, info->fix.smem_len,
 			info->screen_base, fbi->fb_start_dma);
-failed:
+failed_free_info:
 	kfree(info);
+failed_put_clk:
 	clk_put(clk);
 
 	dev_err(&pdev->dev, "frame buffer device init failed with %d\n", ret);

Re: [PATCH 8/10] drivers/video/imxfb.c: add missing clk_put

[Sascha Hauer]

On Wed, Jun 01, 2011 at 07:10:11PM +0200, Julia Lawall wrote:
> From: Julia Lawall <julia@diku.dk>
> 
> Reorder the labels at the end of the function to correspond to the order in
> which the resources are allocated.
> 
> A simplified version of the semantic match that finds this problem is as
> follows: (http://coccinelle.lip6.fr/)
> 
> // <smpl>
> @r exists@
> expression e1,e2;
> statement S;
> @@
> 
> e1 = clk_get@p1(...);
> ... when != e1 = e2
>     when != clk_put(e1)
>     when any
> if (...) { ... when != clk_put(e1)
>                when != if (...) { ... clk_put(e1) ... }
> * return@p3 ...;
>  } else S
> // </smpl>
> 
> Signed-off-by: Julia Lawall <julia@diku.dk>

Acked-by: Sascha Hauer <s.hauer@pengutronix.de>

> 
> ---
>  drivers/video/imxfb.c |    4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/video/imxfb.c b/drivers/video/imxfb.c
> index d2ccfd6..f135dbe 100644
> --- a/drivers/video/imxfb.c
> +++ b/drivers/video/imxfb.c
> @@ -856,10 +856,10 @@ failed_platform_init:
>  		dma_free_writecombine(&pdev->dev,fbi->map_size,fbi->map_cpu,
>  			fbi->map_dma);
>  failed_map:
> -	clk_put(fbi->clk);
> -failed_getclock:
>  	iounmap(fbi->regs);
>  failed_ioremap:
> +	clk_put(fbi->clk);
> +failed_getclock:
>  	release_mem_region(res->start, resource_size(res));
>  failed_req:
>  	kfree(info->pseudo_palette);
> 
> 

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Re: [PATCH 8/10] drivers/video/imxfb.c: add missing clk_put

[Paul Mundt]

On Wed, Jun 01, 2011 at 07:10:11PM +0200, Julia Lawall wrote:
>  drivers/video/imxfb.c |    4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

On Wed, Jun 01, 2011 at 07:10:13PM +0200, Julia Lawall wrote:
>  drivers/video/pxa168fb.c |   17 ++++++++++-------
>  1 file changed, 10 insertions(+), 7 deletions(-)
> 
Both applied, thanks.