linux-kernel - Re: [PATCH 3/5] drivers/video/jz4740_fb.c: use devm

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Date:	Thu, 23 Aug 2012 20:41:03 +0000
From:	Florian Tobias Schandinat <FlorianSchandinat@....de>
To:	Damien Cassou <damien.cassou@...l.fr>
CC:	kernel-janitors@...r.kernel.org, linux-fbdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/5] drivers/video/jz4740_fb.c: use devm_ functions

On 08/03/2012 03:40 PM, Damien Cassou wrote:
> From: Damien Cassou <damien.cassou@...l.fr>
> 
> The various devm_ functions allocate memory that is released when a driver
> detaches. This patch uses these functions for data that is allocated in the
> probe function of a platform device and is only freed in the remove function.
> 
> Signed-off-by: Damien Cassou <damien.cassou@...l.fr>

Applied.


Thanks,

Florian Tobias Schandinat

> 
> ---
>  drivers/video/jz4740_fb.c |   22 ++++++----------------
>  1 file changed, 6 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/video/jz4740_fb.c b/drivers/video/jz4740_fb.c
> index de36693..7669770 100644
> --- a/drivers/video/jz4740_fb.c
> +++ b/drivers/video/jz4740_fb.c
> @@ -659,25 +659,25 @@ static int __devinit jzfb_probe(struct platform_device *pdev)
>  	jzfb->pdata = pdata;
>  	jzfb->mem = mem;
> 
> -	jzfb->ldclk = clk_get(&pdev->dev, "lcd");
> +	jzfb->ldclk = devm_clk_get(&pdev->dev, "lcd");
>  	if (IS_ERR(jzfb->ldclk)) {
>  		ret = PTR_ERR(jzfb->ldclk);
>  		dev_err(&pdev->dev, "Failed to get lcd clock: %d\n", ret);
>  		goto err_framebuffer_release;
>  	}
> 
> -	jzfb->lpclk = clk_get(&pdev->dev, "lcd_pclk");
> +	jzfb->lpclk = devm_clk_get(&pdev->dev, "lcd_pclk");
>  	if (IS_ERR(jzfb->lpclk)) {
>  		ret = PTR_ERR(jzfb->lpclk);
>  		dev_err(&pdev->dev, "Failed to get lcd pixel clock: %d\n", ret);
> -		goto err_put_ldclk;
> +		goto err_framebuffer_release;
>  	}
> 
> -	jzfb->base = ioremap(mem->start, resource_size(mem));
> +	jzfb->base = devm_ioremap(&pdev->dev, mem->start, resource_size(mem));
>  	if (!jzfb->base) {
>  		dev_err(&pdev->dev, "Failed to ioremap register memory region\n");
>  		ret = -EBUSY;
> -		goto err_put_lpclk;
> +		goto err_framebuffer_release;
>  	}
> 
>  	platform_set_drvdata(pdev, jzfb);
> @@ -693,7 +693,7 @@ static int __devinit jzfb_probe(struct platform_device *pdev)
>  	ret = jzfb_alloc_devmem(jzfb);
>  	if (ret) {
>  		dev_err(&pdev->dev, "Failed to allocate video memory\n");
> -		goto err_iounmap;
> +		goto err_framebuffer_release;
>  	}
> 
>  	fb->fix = jzfb_fix;
> @@ -734,12 +734,6 @@ err_free_devmem:
> 
>  	fb_dealloc_cmap(&fb->cmap);
>  	jzfb_free_devmem(jzfb);
> -err_iounmap:
> -	iounmap(jzfb->base);
> -err_put_lpclk:
> -	clk_put(jzfb->lpclk);
> -err_put_ldclk:
> -	clk_put(jzfb->ldclk);
>  err_framebuffer_release:
>  	framebuffer_release(fb);
>  err_release_mem_region:
> @@ -756,7 +750,6 @@ static int __devexit jzfb_remove(struct platform_device *pdev)
>  	jz_gpio_bulk_free(jz_lcd_ctrl_pins, jzfb_num_ctrl_pins(jzfb));
>  	jz_gpio_bulk_free(jz_lcd_data_pins, jzfb_num_data_pins(jzfb));
> 
> -	iounmap(jzfb->base);
>  	release_mem_region(jzfb->mem->start, resource_size(jzfb->mem));
> 
>  	fb_dealloc_cmap(&jzfb->fb->cmap);
> @@ -764,9 +757,6 @@ static int __devexit jzfb_remove(struct platform_device *pdev)
> 
>  	platform_set_drvdata(pdev, NULL);
> 
> -	clk_put(jzfb->lpclk);
> -	clk_put(jzfb->ldclk);
> -
>  	framebuffer_release(jzfb->fb);
> 
>  	return 0;
> 

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