linux-kernel - Re: [PATCH 2/5] drivers/video/gbefb.c: use devm

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Date:	Thu, 23 Aug 2012 20:37:44 +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 2/5] drivers/video/gbefb.c: use devm_ functions

On 07/31/2012 04:39 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/gbefb.c |   15 +++++----------
>  1 file changed, 5 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/video/gbefb.c b/drivers/video/gbefb.c
> index 7e7b7a9..9b79d38 100644
> --- a/drivers/video/gbefb.c
> +++ b/drivers/video/gbefb.c
> @@ -1156,7 +1156,8 @@ static int __devinit gbefb_probe(struct platform_device *p_dev)
>  		goto out_release_framebuffer;
>  	}
>  
> -	gbe = (struct sgi_gbe *) ioremap(GBE_BASE, sizeof(struct sgi_gbe));
> +	gbe = (struct sgi_gbe *) devm_ioremap(&p_dev->dev, GBE_BASE,
> +					      sizeof(struct sgi_gbe));
>  	if (!gbe) {
>  		printk(KERN_ERR "gbefb: couldn't map mmio region\n");
>  		ret = -ENXIO;
> @@ -1170,12 +1171,13 @@ static int __devinit gbefb_probe(struct platform_device *p_dev)
>  	if (!gbe_tiles.cpu) {
>  		printk(KERN_ERR "gbefb: couldn't allocate tiles table\n");
>  		ret = -ENOMEM;
> -		goto out_unmap;
> +		goto out_release_mem_region;
>  	}
>  
>  	if (gbe_mem_phys) {
>  		/* memory was allocated at boot time */
> -		gbe_mem = ioremap_nocache(gbe_mem_phys, gbe_mem_size);
> +		gbe_mem = devm_ioremap_nocache(&p_dev->dev, gbe_mem_phys,
> +					       gbe_mem_size);
>  		if (!gbe_mem) {
>  			printk(KERN_ERR "gbefb: couldn't map framebuffer\n");
>  			ret = -ENOMEM;
> @@ -1241,13 +1243,9 @@ static int __devinit gbefb_probe(struct platform_device *p_dev)
>  out_gbe_unmap:
>  	if (gbe_dma_addr)
>  		dma_free_coherent(NULL, gbe_mem_size, gbe_mem, gbe_mem_phys);
> -	else
> -		iounmap(gbe_mem);
>  out_tiles_free:
>  	dma_free_coherent(NULL, GBE_TLB_SIZE * sizeof(uint16_t),
>  			  (void *)gbe_tiles.cpu, gbe_tiles.dma);
> -out_unmap:
> -	iounmap(gbe);
>  out_release_mem_region:
>  	release_mem_region(GBE_BASE, sizeof(struct sgi_gbe));
>  out_release_framebuffer:
> @@ -1264,12 +1262,9 @@ static int __devexit gbefb_remove(struct platform_device* p_dev)
>  	gbe_turn_off();
>  	if (gbe_dma_addr)
>  		dma_free_coherent(NULL, gbe_mem_size, gbe_mem, gbe_mem_phys);
> -	else
> -		iounmap(gbe_mem);
>  	dma_free_coherent(NULL, GBE_TLB_SIZE * sizeof(uint16_t),
>  			  (void *)gbe_tiles.cpu, gbe_tiles.dma);
>  	release_mem_region(GBE_BASE, sizeof(struct sgi_gbe));
> -	iounmap(gbe);
>  	gbefb_remove_sysfs(&p_dev->dev);
>  	framebuffer_release(info);
>  
> 
> 

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